Re: [Elecraft] KX3 2M transverter

[Chris Cox, N0UK]

Yes, Steve, all modes supported by the KX3 are usable on all bands, including 
those using either internal or external transverters.

I am using my KX3 now primarily as the I/f for my 10GHz rig and have used it on 
multiple modes including CW, SSB, FM, AM, and digital.
Chris Cox, N0UK
chr...@chris.org
https://www.credly.com/go/IR77aRbH2rFDdOiymuxu2w



> On Dec 28, 2023, at 12:01, Steve McKee  wrote:
> 
> Is it possible to transmit on 2M in the SSB or AM modes??
> Couldn’t see an option for those except FM.
> 
> KE0RSI
> null
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[Elecraft] KX3 2M transverter

[Steve McKee]

Is it possible to transmit on 2M in the SSB or AM modes??
Couldn’t see an option for those except FM.

KE0RSI
null
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[Elecraft] SOLD> Elecraft KX3-2M Transverter Board Option.

[ken057581]

Sold. Thanks all! Happy Holidays...
Ken

Hello all,
I have the KX3-2M Transverter option board for sale. It's about four years old.
I don't need the board for 2m FM and putting up a large outdoor beam for SSB at 
this HOA location isn't possible. 
During testing, it receives and transmits fine on my attic vertical into local 
repeaters.
Removed it from the KX3 while following the manual and ESD procedures.
A hard copy of the installation/operating manual is included.
Photos available.
I think Elecraft is up to $300.00 for this board!
No returns or refunds for all the standard reasons.

$185.00 shipped to CONUS only.
Shipping prices are just out of site now!
PayPal, friends/family, Zelle, Postal Money order or a cleared personal check 
are all ok.
Thanks for looking,
Ken, W2GIW


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Re: [Elecraft] SALE > Elecraft KX3-2M Transverter Board Option.

[QRP5W]

Hey guys,

The transverter is sensitive enough to hear low Earth orbiting
satellites with a 3-element hand-held yagi clearly. I'd jump on it,
but I already have one.
72
Howard Kraus, K2UD

-From: ken057...@gmail.com
To: elecraft@mailman.qth.net
Cc: 
Sent: Friday December 22 2023 3:58:20PM
Subject: [Elecraft] SALE > Elecraft KX3-2M Transverter Board Option.

 Hello all,
 I have the KX3-2M Transverter option board for sale. It's about four
years old.
 I don't need the board for 2m FM and putting up a large outdoor beam
for SSB at this HOA location isn't possible.
 During testing, it receives and transmits fine on my attic vertical
into local repeaters.
 Removed it from the KX3 while following the manual and ESD
procedures.
 A hard copy of the installation/operating manual is included.
 Photos available.
 I think Elecraft is up to $300.00 for this board!
 No returns or refunds for all the standard reasons.

 $185.00 shipped to CONUS only.
 Shipping prices are just out of site now!
 PayPal, friends/family, Zelle, Postal Money order or a cleared
personal check are all ok.
 Thanks for looking,
 Ken, W2GIW

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 Elecraft mailing list
 Home: http://mailman.qth.net/mailman/listinfo/elecraft
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 This list hosted by: http://www.qsl.net [1]
 Please help support this email list: http://www.qsl.net/donate.html
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Links:
--
[1] http://www.qsl.net

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Re: [Elecraft] SALE > Elecraft KX3-2M Transverter Board Option.

[David Satterwhite via Elecraft]

So... it's not for sale? 

Sent from Yahoo Mail on Android 
 
  On Fri, Dec 22, 2023 at 13:37, Jerry Moore wrote:   I 
still haven't taken the time to get the value of my setup.. maybe after the 
first of the year. 


-Original Message-
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of ken057...@gmail.com
Sent: Friday, December 22, 2023 3:57 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] SALE > Elecraft KX3-2M Transverter Board Option.

Hello all,
I have the KX3-2M Transverter option board for sale. It's about four years old.
I don't need the board for 2m FM and putting up a large outdoor beam for SSB at 
this HOA location isn't possible. 
During testing, it receives and transmits fine on my attic vertical into local 
repeaters.
Removed it from the KX3 while following the manual and ESD procedures.
A hard copy of the installation/operating manual is included.
Photos available.
I think Elecraft is up to $300.00 for this board!
No returns or refunds for all the standard reasons.

$185.00 shipped to CONUS only.
Shipping prices are just out of site now!
PayPal, friends/family, Zelle, Postal Money order or a cleared personal check 
are all ok.
Thanks for looking,
Ken, W2GIW


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Re: [Elecraft] SALE > Elecraft KX3-2M Transverter Board Option.

[Jerry Moore]

I still haven't taken the time to get the value of my setup.. maybe after the 
first of the year. 


-Original Message-
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of ken057...@gmail.com
Sent: Friday, December 22, 2023 3:57 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] SALE > Elecraft KX3-2M Transverter Board Option.

Hello all,
I have the KX3-2M Transverter option board for sale. It's about four years old.
I don't need the board for 2m FM and putting up a large outdoor beam for SSB at 
this HOA location isn't possible. 
During testing, it receives and transmits fine on my attic vertical into local 
repeaters.
Removed it from the KX3 while following the manual and ESD procedures.
A hard copy of the installation/operating manual is included.
Photos available.
I think Elecraft is up to $300.00 for this board!
No returns or refunds for all the standard reasons.

$185.00 shipped to CONUS only.
Shipping prices are just out of site now!
PayPal, friends/family, Zelle, Postal Money order or a cleared personal check 
are all ok.
Thanks for looking,
Ken, W2GIW


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[Elecraft] SALE > Elecraft KX3-2M Transverter Board Option.

[ken057581]

Hello all,
I have the KX3-2M Transverter option board for sale. It's about four years old.
I don't need the board for 2m FM and putting up a large outdoor beam for SSB at 
this HOA location isn't possible. 
During testing, it receives and transmits fine on my attic vertical into local 
repeaters.
Removed it from the KX3 while following the manual and ESD procedures.
A hard copy of the installation/operating manual is included.
Photos available.
I think Elecraft is up to $300.00 for this board!
No returns or refunds for all the standard reasons.

$185.00 shipped to CONUS only.
Shipping prices are just out of site now!
PayPal, friends/family, Zelle, Postal Money order or a cleared personal check 
are all ok.
Thanks for looking,
Ken, W2GIW


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[Elecraft] KX3 2M amp

[Bob McGraw]

I use an external VHF amp with my transverter.  Works great!   Do be 
mindful of the amp switching time. The relay switching time is about 15 
ms.   I prefer to use hardwire PTT as opposed to using RF detection to 
switch the amp.


73

Bob, K4TAX

On 12/4/2023 8:07 AM, elecraft-requ...@mailman.qth.net wrote:

Message: 1
Date: Sun, 3 Dec 2023 09:37:09 -0700
From: Steve McKee
To:elecraft@mailman.qth.net
Subject: [Elecraft] KX3 2M amp
Message-ID:

Content-Type: text/plain; charset="UTF-8"

Hello,
I?ve have the 2 meter module in my KX3, and am wondering if I can hook a
small VHF amplifier to it, to increase power output??
I?m planning on purchasing the KXPA 100 for the HF side?.
Course these are both for in home use, not in the field?QRP in the field?

Thank You, 73?s


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Re: [Elecraft] KX3 2M amp

[Tim Tucker]

Yes, of course. Works fine.

On Sun, Dec 3, 2023, 8:37 AM Steve McKee  wrote:

> Hello,
> I’ve have the 2 meter module in my KX3, and am wondering if I can hook a
> small VHF amplifier to it, to increase power output??
> I’m planning on purchasing the KXPA 100 for the HF side….
> Course these are both for in home use, not in the field…QRP in the field…
>
> Thank You, 73’s
>
>
> null
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[Elecraft] KX3 2M amp

[Steve McKee]

Hello,
I’ve have the 2 meter module in my KX3, and am wondering if I can hook a
small VHF amplifier to it, to increase power output??
I’m planning on purchasing the KXPA 100 for the HF side….
Course these are both for in home use, not in the field…QRP in the field…

Thank You, 73’s


null
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[Elecraft] KX3 2m module problem instable working like autoscillation

[Aurelio via Elecraft]

 hi to all 
i have just installed 2m module into my KX3, it works very fine in rx but when 
i go to transmit i listen noise very high into speaker e during the trasmission 
the noise change e appear the hi current indication like an autoscillating of 
final stage. 
apparently all work, in rx position che current is about 0,300 mA when transmit 
1,8 Amper but about more second late the current groven up to hi current 
indication, the output is about 3,5 watt! 
i didn't find the schematic of module, because i want to check the currente 
bias setting. 
have you an indication to solve the problem? 


 is it bias problem? or is ground problem? 



what is the correct bias and where i can check it? 



tks 
Aurelio IZ8EGM 

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Re: [Elecraft] KX3-2M TO-220 Retainer and Nylon Screw

[Steve Zabarnick]

*I also have a KX3 that does not use the TO-220 retainer.*

*This is SN 2829. *

*Steve N9SZ*



*>Subject:    [Elecraft] KX3-2M TO-220 Retainer and Nylon Screw
>From:   AL7CR  
><https://marc.info/?a=14712142161&r=1&w=2>
>Date:   2020-07-20 3:37:22 <https://marc.info/?l=elecraft&r=1&w=2&b=202007>
>Message-ID: 7b6bdb8d-3089-4116-b28b-01f820ac6286 () www ! fastmail ! com 
><https://marc.info/?i=7b6bdb8d-3089-4116-b28b-01f820ac6286%20()%20www%20!%20fastmail%20!%20com>
>[Download RAW message <https://marc.info/?l=elecraft&m=159521638214632&q=mbox> 
>or body <https://marc.info/?l=elecraft&m=159521638214632&q=raw>]*
>
>Does anyone know if these parts are a recent change?  My pal is sending me his 
>board and it did not have these parts.  The heat sink was attached to the case 
>directly with a metal screw and the nylon screw was not present and the hole 
>for it empty.
>
>If the parts are strictly required I will try and get them from the factory 
>tomorrow.
>
>Thanks for the help.
>
>AL7CR
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[Elecraft] KX3 2m sensitivity issues

[Richard Penc]

All:

I completed the builds of two Elecraft KX3 kits with all the bells and
whistles including 2m. I have run receive sensitivity tests using the XG3
and XG3 and XG50, and there are no appreciable differences on any of the
bands. However, the 2m Wx radio sensitivity differs by 1.5 S units between
the two, same parameters set. The preamp is on and set to 20dB on both. Any
ideas? I have gotten nothing substantive from Elecraft on this issue. I'm
wondering if it is because it is FM mode and the sig gens are CW (or square
wave). Haven't gotten on 2m yet. Any pointers would be appreciated. I'm
perplexed to say the least.

de Rich, WK2A

-- 

*Richard S. Penc*

*(402) 953-5043 (h), (402) 699-9800 (m)*

"It does not make sense to hire smart people and then tell them what to do.
We hire smart people to tell us what to do." Steve Jobs
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Re: [Elecraft] KX3 2m module

[Dave Erickson]

On 8/31/2020 5:45 PM, Dave Erickson wrote:

On 8/31/2020 5:24 PM, 1lasportsman 1lasportsman wrote:

I installed a 2m   for the KX3  and it all appeared to set up great.

The only problem is it will not select the 2 meter antenna (antenna 2).

do I need to somehow tell radio that 2 meters is on antenna 2 .

I have read the manual and no where can I find This.

Asking before opening radio up again

Bill

WF9M


Bill,

The 2m module can ONLY use ant2 and should automatically select it as 
soon as you switch to the 2m band on the KX3.


Also, this should not be confused with ANT2 which is only available if 
you have a KXPA-100 connected.


--
Dave Erickson
k0dom
73

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Re: [Elecraft] KX3 2m module

[Dave Erickson]

On 8/31/2020 5:24 PM, 1lasportsman 1lasportsman wrote:

I installed a 2m   for the KX3  and it all appeared to set up great.

The only problem is it will not select the 2 meter antenna (antenna 2).

do I need to somehow tell radio that 2 meters is on antenna 2 .

I have read the manual and no where can I find This.

Asking before opening radio up again

Bill

WF9M


Bill,

The 2m module can ONLY use ant2 and should automatically select it as 
soon as you switch to the 2m band on the KX3.


--
Dave Erickson
k0dom
73

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[Elecraft] KX3 2m module

[1lasportsman 1lasportsman]

I installed a 2m   for the KX3  and it all appeared to set up great.

The only problem is it will not select the 2 meter antenna (antenna 2).

do I need to somehow tell radio that 2 meters is on antenna 2 .

I have read the manual and no where can I find This.

Asking before opening radio up again

Bill

WF9M
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[Elecraft] KX3-2M TO-220 Retainer and Nylon Screw

[AL7CR]

Does anyone know if these parts are a recent change?  My pal is sending me his 
board and it did not have these parts.  The heat sink was attached to the case 
directly with a metal screw and the nylon screw was not present and the hole 
for it empty.

If the parts are strictly required I will try and get them from the factory 
tomorrow.

Thanks for the help.

AL7CR
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[Elecraft] KX3 2m Transverter Error

[David Thompson via Elecraft]

Good evening all,

When I powered up my KX3 this evening, it displayed ERR 2M on VFO B and d=004 
on VFO A. If I turn off the 2m transverter in the configuration menu, the unit 
powers up without error. 

I pulled the back and reseated the ribbon cable. This did not correct the 
issue. 

I’m looking for some guidance on troubleshooting the radio. Any input is 
appreciated.

Best...

David Thompson, AG7TX
Jack of All Trades
Master of None
dbthomp...@me.com




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Re: [Elecraft] KX3/2m driving an SG-Labs 1296Mhz transverter configuration question

[Paul Gacek via Elecraft]

Just to close this out it turns out that the incorrect setting I had was 
XV2(Adr) = trn1.

Per Elecraft support I should have selected XV2(Adr) = int.trn0

The correct settings (which are different than configuring a K3) are;

XV2 (on) = Yes
XV2 (RF) = 1296
XV2 (IF) = 50
XV2 (Pwr) = 3.0
XV2 (OFS) = 0
XV2 (Adr) = int.trn0

Now works!!

Thanks to everyone that offered up suggestions.

Paul
W6PNG/M0SNA

> On May 9, 2019, at 3:13 PM, Paul Gacek via Elecraft 
>  wrote:
> 
> I have had the KX3/2m and SG Labs successfully working by simply selecting 
> the KX3 2m band (i.e the KX3 VFO displays 144.200Mhz etc) and driving the 
> SGLabs box with 144Mhz signals.
> 
> …and if interested in prior UK adventure with my KX3/SGLabs box check out 
> https://w6png.wordpress.com/2018/10/14/black-is-black 
> 
> 
> As a SOTA guy mental arithmetic on a peak can be faulty and so I would prefer 
> to configure one of the spare XVn (2-9) for 1296Mhz display/operation.
> 
> I have left the 2m XV1 parameters untouched and set the XV2 parameters as 
> follows;
> 
> XV2 (on) = Yes
> XV2 (RF) = 1296
> XV2 (IF) = 50
> XV2 (Pwr) = 3.0
> XV2 (OFS) = 0
> XV2 (Adr) = trn1 
> 
> Unfortunately I am not driving the SG-Lab transverter with these XV2 settings 
> and the band set to XV2 (i.e the one between 144 and 1.8Mhz
> 
> What have I misconfigured?
> 
> Paul
> W6PNG/M0SNA
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Re: [Elecraft] KX3/2m driving an SG-Labs 1296Mhz transverter configuration question

[w4sc]

Dave,

Try:

XV2 (on) = Yes 
XV2 (RF) = 1296  1296 your transverter band RF freq.
XV2 (IF) = 5050 MHz for the KX3-2M option 
XV2 (Pwr) = 3.0
XV2 (OFS) = 0
XV2 (Adr) = INT trn1 Selects INTERNAL transverter.

I would be interested to know how the above works for you.

73 de Ben W4SC.

Sent from Mail for Windows 10

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Re: [Elecraft] KX3/2m driving an SG-Labs 1296Mhz transverter configuration question

[Paul Gacek via Elecraft]

Thanks but 144 does not show up as an option when I select XV2 IF. Options are 
7,14,28 and 50.

Do I need to enable something else to get 144 as an option?

Paul

> On May 9, 2019, at 7:44 PM, Don Wilhelm  wrote:
> 
> Paul,
> 
> You are telling the KX3 to use the 50 MHz output (on the BNC connector) and 
> not the 144 MHz output from the 2 meter option.
> Change the XV2 IF parameter to 144.
> 
> The XV2 ADR parameter gives the band decode that will be sent when that 
> transverter is selected, and can be used to activate your 1296 transverter if 
> you decode the band data correctly.
> 
> 73,
> Don W3FPR
> 
>> On 5/9/2019 10:13 AM, Paul Gacek via Elecraft wrote:
>> I have had the KX3/2m and SG Labs successfully working by simply selecting 
>> the KX3 2m band (i.e the KX3 VFO displays 144.200Mhz etc) and driving the 
>> SGLabs box with 144Mhz signals.
>> …and if interested in prior UK adventure with my KX3/SGLabs box check out 
>> https://w6png.wordpress.com/2018/10/14/black-is-black 
>> 
>> As a SOTA guy mental arithmetic on a peak can be faulty and so I would 
>> prefer to configure one of the spare XVn (2-9) for 1296Mhz display/operation.
>> I have left the 2m XV1 parameters untouched and set the XV2 parameters as 
>> follows;
>> XV2 (on) = Yes
>> XV2 (RF) = 1296
>> XV2 (IF) = 50
>> XV2 (Pwr) = 3.0
>> XV2 (OFS) = 0
>> XV2 (Adr) = trn1
>> Unfortunately I am not driving the SG-Lab transverter with these XV2 
>> settings and the band set to XV2 (i.e the one between 144 and 1.8Mhz
>> What have I misconfigured?

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Re: [Elecraft] KX3/2m driving an SG-Labs 1296Mhz transverter configuration question

[Don Wilhelm]

Paul,

You are telling the KX3 to use the 50 MHz output (on the BNC connector) 
and not the 144 MHz output from the 2 meter option.

Change the XV2 IF parameter to 144.

The XV2 ADR parameter gives the band decode that will be sent when that 
transverter is selected, and can be used to activate your 1296 
transverter if you decode the band data correctly.


73,
Don W3FPR

On 5/9/2019 10:13 AM, Paul Gacek via Elecraft wrote:

I have had the KX3/2m and SG Labs successfully working by simply selecting the 
KX3 2m band (i.e the KX3 VFO displays 144.200Mhz etc) and driving the SGLabs 
box with 144Mhz signals.

…and if interested in prior UK adventure with my KX3/SGLabs box check out 
https://w6png.wordpress.com/2018/10/14/black-is-black 


As a SOTA guy mental arithmetic on a peak can be faulty and so I would prefer 
to configure one of the spare XVn (2-9) for 1296Mhz display/operation.

I have left the 2m XV1 parameters untouched and set the XV2 parameters as 
follows;

XV2 (on) = Yes
XV2 (RF) = 1296
XV2 (IF) = 50
XV2 (Pwr) = 3.0
XV2 (OFS) = 0
XV2 (Adr) = trn1

Unfortunately I am not driving the SG-Lab transverter with these XV2 settings 
and the band set to XV2 (i.e the one between 144 and 1.8Mhz

What have I misconfigured?


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[Elecraft] KX3/2m driving an SG-Labs 1296Mhz transverter configuration question

[w4sc]

Paul,

Try setting the XV2 (Adr) = INT trn1 if it is available in the menu.


My KX3 is stored away currently, so I can’t check it,, however The K3 works as 
follows…  Reference P68 of K3S manual for more detail.

• XVn ADR specifies a transverter select address. Use INT. TRN0-9 with the 
K144XV (see XVn ADR description for details).

I hope the KX3-144 is implemented like the K3 in this regard, as I plan to use 
mine as a uWave IF along with a PX3 also.

Anyone here have answer??

73 de Ben W4SC


Sent from Mail for Windows 10

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[Elecraft] KX3/2m driving an SG-Labs 1296Mhz transverter configuration question

[Paul Gacek via Elecraft]

I have had the KX3/2m and SG Labs successfully working by simply selecting the 
KX3 2m band (i.e the KX3 VFO displays 144.200Mhz etc) and driving the SGLabs 
box with 144Mhz signals.

…and if interested in prior UK adventure with my KX3/SGLabs box check out 
https://w6png.wordpress.com/2018/10/14/black-is-black 


As a SOTA guy mental arithmetic on a peak can be faulty and so I would prefer 
to configure one of the spare XVn (2-9) for 1296Mhz display/operation.

I have left the 2m XV1 parameters untouched and set the XV2 parameters as 
follows;

XV2 (on) = Yes
XV2 (RF) = 1296
XV2 (IF) = 50
XV2 (Pwr) = 3.0
XV2 (OFS) = 0
XV2 (Adr) = trn1 

Unfortunately I am not driving the SG-Lab transverter with these XV2 settings 
and the band set to XV2 (i.e the one between 144 and 1.8Mhz

What have I misconfigured?

Paul
W6PNG/M0SNA
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Re: [Elecraft] KX3 2m module, SMA connector to big for cutout

[Bill Johnson]

You do know you have to match the flat portion of the connector to the flat 
portion of the case?

73,
Bill
K9YEQ

https://wrj-tech.com/

-Original Message-
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of K7KY
Sent: Friday, November 23, 2018 4:54 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] KX3 2m module, SMA connector to big for cutout

I'm installing the 2m module in my KX3, but the SMA connector will not pass 
through the case cutout.  I've scraped paint off the hole rim, but it's still 
no-go.  Either the hole is too small or the connector a bit too big. I can't 
just enlarge the hole without getting metal dust inside or dismantling the 
radio. Has anyone encountered this issue when installing the 2m module?
Thanks, Doug K7KY
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[Elecraft] KX3 2m module, SMA connector to big for cutout

[K7KY]

I'm installing the 2m module in my KX3, but the SMA connector will not 
pass through the case cutout.  I've scraped paint off the hole rim, but 
it's still no-go.  Either the hole is too small or the connector a bit 
too big. I can't just enlarge the hole without getting metal dust inside 
or dismantling the radio. Has anyone encountered this issue when 
installing the 2m module?

Thanks, Doug K7KY
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Re: [Elecraft] KX3 2m external amplifier

[Petr, OK1RP/M0SIS]

Dear Tim

where did you bought these 320Gs please? I am looking for them too but no
luck here in EU.

Thanks,



-
73 - Petr, OK1RP 
"Apple & Elecraft freak" 
B:http://ok1rp.blogspot.com
G+:http://goo.gl/w3u2s9
G+: http://goo.gl/gP99xq
--
Sent from: http://elecraft.365791.n2.nabble.com/
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Re: [Elecraft] KX3 2M module SMA connector loosening

[Petr, OK1RP/M0SIS]

Dear Ryan,

in order to avoid the torqueing or breaking the SMA I can recommend to use
SMA coaxial jumper.
https://plus.google.com/100312042524727617304/posts/b4hvsciD3qG?hl=eng
...available on eBay, but be careful to get high quality only, PTFE
recommended.
Never use adapter or even set of few adapters directly.

73 - Petr, OK1RP



-
http://ok1rp.blogspot.com
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Re: [Elecraft] KX3 2M module SMA connector loosening

[Ryan Noguchi via Elecraft]

 Yes, there is very limited space in that area so it's difficult to tighten 
that nut unless you have a very compact tool. My thinnest, smallest crescent 
spanner couldn't fit (much less turn) in that space, but rather than put the 
project on hold to find the right-sized tool, which in retrospect would have 
been the best course of action, I used a wrench to hold the outer (fixed) nut 
stationary while using the pliers to tighten the inner (free) nut. The Elecraft 
tech uses only a pair of needlenose pliers in their Youtube video that 
demonstrates their recommended installation procedure. 

The multi-size spanner that KY5G suggested seems even larger, so likely would 
be too large to fit in that space. The problem is not so much thickness, but 
width. However, it is inexpensive and might be worth getting and trying. That 
torque wrench he suggested is probably small enough to fit and work, with its 
narrow "tuning fork" shape rather than a "crescent" shape, but at $115 is 
insanely expensive for something that I may only ever use again if I install a 
second transverter in my second KX3. I think what I'll do at this point is 
first see if I can find a suitable tool that isn't nearly that expensive. 

BTW, I am using a coax jumper to reduce torque on the connector, but my 
application is pedestrian portable, not base-station or "picnic table" 
portable. 

I appreciate the advice and the leads. I'll have to chew on this some before 
taking action. 

Thanks and 73, Ryan AI6DO




  
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Re: [Elecraft] KX3 2M module SMA connector loosening

[kstover]

All,

SMA's are also supposed to be torqued to 9 lb./in.. They make break over open 
end torque wrenches to do just that 
They are spendy so unless your installing hundreds of the things I'd use a deep 
well socket and a thin combination wrench of appropriate size.
I haven't looked at the transverter install procedure but can’t imagine trying 
to get the connector tight with the radio full of "stuff".

R. Kevin StoverAC0H

ARRL, FISTS, SKCC, NAQCC.
One of the guys that made sneakernet irrelevant, in my little corner of the 
world.
“If it doesn’t work the first time you push the button it won’t work the 
20th…Just stop.”

-Original Message-
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of Clay Autery
Sent: Saturday, May 26, 2018 3:50 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KX3 2M module SMA connector loosening

THIS!  There is no substitute for having the correct tools for the job!!

There are multi-size thin spanner wrenches made JUST for SMA and other small 
connectors...  Here is a link to the one that comes with my SDR-Kits DQ8SAQ 
VNWA:

https://www.sdr-kits.net/Flat%20Spanner

They sell it separately.  Of course, you could also buy a super expensive set 
of thin spanners...  

Additionally, as I study up on using my VNA, I have become more acutely aware 
that connectors have make/break cycle limits.   They DO wear out, especially if 
you over-torque them.  On PCB soldered connectors, it is a pain to replace 
them, so one might consider extending the lifespan by placing a sacrificial SMA 
Plug to SMA jack adapter in between the SMA jack on the radio and the 
feed-line  IMHO, especially on portable radios/devices that are setup and 
taken down repeatedly, it is worth the additional insertion loss.  Just buy 
Amphenol or better quality ones and that is minimized.  Here's a link to a good 
one.

https://www.sdr-kits.net/sma-male-to-female

A good adapter will give you 500+ make/break cycles and still remain in spec.  
Then, you just buy a new adapter rather than have to desolder and re-solder the 
PCB soldered, end-firing SMA jack assuming you can find the right one.
Thus the make/break cycle on your device only increments by 1 instead of 
500+.

Additionally, there IS a torque spec for SMA connectors...  It's about 4 Lb-in 
for a brass connector, a little higher for stainless steel.  When mating 
stainless steel and brass fittings together, use the lower torque figure.  You 
CAN get fixed torque wrenches for connectors; they are not cheap.  I use my 
thin spanner or a flare fitting wrench and a Lyman trigger pull scale IF/WHEN I 
want an exact torque.  Main deal... don't over torque a connector.  I WOULD 
torque the adapter to the device jack using some method of measurement system.  
Then, connect the feedline with the spanner...  The jack side of the adapter 
will spin on the rubber seal before reaching 4LB-in built-in over-torque 
protection.

Here's an example of an SMA torque wrench a very reasonably priced one all 
things considered:

https://www.sdr-kits.net/Torque-Wrench

73,

__
Clay Autery, KY5G
(318) 518-1389

On 05/26/18 15:16, Don Wilhelm wrote:
> Ryan,
>
> You need 2 wrenches (not pliers) - preferably thin ones.  Tighten the 
> nut down until the lockwashers bite into the KX3 enclosure metal so 
> the teeth have good conductivity to the enclosure.
>
> 73,
> Don W3FPR
>
> On 5/26/2018 11:01 AM, Ryan Noguchi via Elecraft wrote:
>> I recently bought and installed the KX3-2M transverter module in one 
>> of my KX3s and am enjoying a much better experience receiving the 
>> downlink from the Mode B AMSAT birds, compared to the TH-F6A I was 
>> using previously. Sensitivity and ergonomics are a huge improvement.
>> Unfortunately, I find that the SMA connector loosens very quickly. 
>> I've already had to open the case and almost completely uninstall the 
>> transverter once (undoing and redoing everything except the internal 
>> coax connections) just to retighten the nut, and it's already worked 
>> itself loose again. Does anyone have a trick they used to keep the 
>> nut from loosening? I can't get a lot of leverage with needlenose 
>> pliers
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Re: [Elecraft] KX3 2M module SMA connector loosening

[Clay Autery]

THIS!  There is no substitute for having the correct tools for the job!!

There are multi-size thin spanner wrenches made JUST for SMA and other 
small connectors...  Here is a link to the one that comes with my 
SDR-Kits DQ8SAQ VNWA:


https://www.sdr-kits.net/Flat%20Spanner

They sell it separately.  Of course, you could also buy a super 
expensive set of thin spanners...  


Additionally, as I study up on using my VNA, I have become more acutely 
aware that connectors have make/break cycle limits.   They DO wear out, 
especially if you over-torque them.  On PCB soldered connectors, it is a 
pain to replace them, so one might consider extending the lifespan by 
placing a sacrificial SMA Plug to SMA jack adapter in between the SMA 
jack on the radio and the feed-line  IMHO, especially on portable 
radios/devices that are setup and taken down repeatedly, it is worth the 
additional insertion loss.  Just buy Amphenol or better quality ones and 
that is minimized.  Here's a link to a good one.


https://www.sdr-kits.net/sma-male-to-female

A good adapter will give you 500+ make/break cycles and still remain in 
spec.  Then, you just buy a new adapter rather than have to desolder and 
re-solder the PCB soldered, end-firing SMA jack assuming you can 
find the right one.
Thus the make/break cycle on your device only increments by 1 instead of 
500+.


Additionally, there IS a torque spec for SMA connectors...  It's about 4 
Lb-in for a brass connector, a little higher for stainless steel.  When 
mating stainless steel and brass fittings together, use the lower torque 
figure.  You CAN get fixed torque wrenches for connectors; they are not 
cheap.  I use my thin spanner or a flare fitting wrench and a Lyman 
trigger pull scale IF/WHEN I want an exact torque.  Main deal... don't 
over torque a connector.  I WOULD torque the adapter to the device jack 
using some method of measurement system.  Then, connect the feedline 
with the spanner...  The jack side of the adapter will spin on the 
rubber seal before reaching 4LB-in built-in over-torque protection.


Here's an example of an SMA torque wrench a very reasonably priced 
one all things considered:


https://www.sdr-kits.net/Torque-Wrench

73,

__
Clay Autery, KY5G
(318) 518-1389

On 05/26/18 15:16, Don Wilhelm wrote:

Ryan,

You need 2 wrenches (not pliers) - preferably thin ones.  Tighten the 
nut down until the lockwashers bite into the KX3 enclosure metal so 
the teeth have good conductivity to the enclosure.


73,
Don W3FPR

On 5/26/2018 11:01 AM, Ryan Noguchi via Elecraft wrote:
I recently bought and installed the KX3-2M transverter module in one 
of my KX3s and am enjoying a much better experience receiving the 
downlink from the Mode B AMSAT birds, compared to the TH-F6A I was 
using previously. Sensitivity and ergonomics are a huge improvement.
Unfortunately, I find that the SMA connector loosens very quickly. 
I've already had to open the case and almost completely uninstall the 
transverter once (undoing and redoing everything except the internal 
coax connections) just to retighten the nut, and it's already worked 
itself loose again. Does anyone have a trick they used to keep the 
nut from loosening? I can't get a lot of leverage with needlenose pliers 

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Re: [Elecraft] KX3 2M module SMA connector loosening

[Don Wilhelm]

Ryan,

You need 2 wrenches (not pliers) - preferably thin ones.  Tighten the 
nut down until the lockwashers bite into the KX3 enclosure metal so the 
teeth have good conductivity to the enclosure.


73,
Don W3FPR

On 5/26/2018 11:01 AM, Ryan Noguchi via Elecraft wrote:

I recently bought and installed the KX3-2M transverter module in one of my KX3s 
and am enjoying a much better experience receiving the downlink from the Mode B 
AMSAT birds, compared to the TH-F6A I was using previously. Sensitivity and 
ergonomics are a huge improvement.
Unfortunately, I find that the SMA connector loosens very quickly. I've already had to open the case and almost completely uninstall the transverter once (undoing and redoing everything except the internal coax connections) just to retighten the nut, and it's already worked itself loose again. Does anyone have a trick they used to keep the nut from loosening? I can't get a lot of leverage with needlenose pliers 

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Re: [Elecraft] KX3 2M module SMA connector loosening

[Scott via Elecraft]

I agree with Mike, 
 
Because of Arrow-induced self-flagellation, I'm using a SMA to BNC cable when I 
do satellite work, with the adapter cable secured with a little homemade clamp 
at the knurled KX3 cabinet screw to keep stress and torque off the KX3 
connector.
 
73 Scott ka9p
 
 
 
 
-Original Message-
From: Mike Parkes 
To: Ryan Noguchi ; elecraft 
Sent: Sat, May 26, 2018 1:14 pm
Subject: Re: [Elecraft] KX3 2M module SMA connector loosening

Ryan,
Another option is to use a short length of coax, sma male to sma female, to
avoid the issue of something torquing the SMA jack on the KX3 loose.
Something like this?

https://www.amazon.com/DHT-Electronics-coaxial-assembly-female/dp/B00COJWS32/ref=sr_1_5?ie=UTF8&qid=1527357956&sr=8-5&keywords=sma+male+to+sma+female+cable


On Sat, May 26, 2018 at 10:51 AM, Ryan Noguchi  wrote:

> Thanks for your email, Mike.
>
> I was thinking of trying to keep the Loctite on just one side of the
> connector (leaving the other side with metal-to-metal contact) and possibly
> also shaving off some paint from the outside of the KX3 case to provide
> better contact on that side. I think I'll hold off on that thought for now,
> as I'm not sure that's such a great idea.
>
> I'll let you know if I get any ideas or offline suggestions.
>
> 73, Ryan AI6DO
>
>
> On Saturday, May 26, 2018, 9:36:26 AM PDT, Mike Parkes 
> wrote:
>
>
> Ryan,
> I experienced the same issue on my kx3 also. I was able to tighten it down
> enough with a wrench to keep it snug so far, but still keep an eye on it. I
> also thought abt locktite but didn't like the idea of introducing non
> conductive material between the case and the jack.
> 73's Mike AB7RU
>
> On May 26, 2018 8:01 AM, "Ryan Noguchi via Elecraft" <
> elecraft@mailman.qth.net> wrote:
>
> I recently bought and installed the KX3-2M transverter module in one of my
> KX3s and am enjoying a much better experience receiving the downlink from
> the Mode B AMSAT birds, compared to the TH-F6A I was using previously.
> Sensitivity and ergonomics are a huge improvement.
> Unfortunately, I find that the SMA connector loosens very quickly. I've
> already had to open the case and almost completely uninstall the
> transverter once (undoing and redoing everything except the internal coax
> connections) just to retighten the nut, and it's already worked itself
> loose again. Does anyone have a trick they used to keep the nut from
> loosening? I can't get a lot of leverage with needlenose pliers with such a
> skinny nut in such close proximity to fragile components, and the thin
> lockwasher doesn't seem to be very effective. I thought I had cranked it
> down pretty tight, but apparently not tight enough.
> I seems that it would have been better to have the separate nut on the
> outside end of the connector (like the connectors on the PX3), since those
> can be tightened up very easily from the outside.
> One option might be to use Blue Loctite. I don't think I'd ever need to
> remove it unless Elecraft comes up with a dual-band (2M and 70CM) internal
> transverter to replace it, but this option would likely be  permanent since
> I don't think I could get enough mechanical leverage to break the Loctite
> and don't think heating up the connector to loosen the Loctite would be a
> good idea.
> Any better ideas?
> Thanks and 73, Ryan AI6DO
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>
>
>
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Re: [Elecraft] KX3 2M module SMA connector loosening

[Mike Parkes]

Ryan,
Another option is to use a short length of coax, sma male to sma female, to
avoid the issue of something torquing the SMA jack on the KX3 loose.
Something like this?

https://www.amazon.com/DHT-Electronics-coaxial-assembly-female/dp/B00COJWS32/ref=sr_1_5?ie=UTF8&qid=1527357956&sr=8-5&keywords=sma+male+to+sma+female+cable


On Sat, May 26, 2018 at 10:51 AM, Ryan Noguchi  wrote:

> Thanks for your email, Mike.
>
> I was thinking of trying to keep the Loctite on just one side of the
> connector (leaving the other side with metal-to-metal contact) and possibly
> also shaving off some paint from the outside of the KX3 case to provide
> better contact on that side. I think I'll hold off on that thought for now,
> as I'm not sure that's such a great idea.
>
> I'll let you know if I get any ideas or offline suggestions.
>
> 73, Ryan AI6DO
>
>
> On Saturday, May 26, 2018, 9:36:26 AM PDT, Mike Parkes 
> wrote:
>
>
> Ryan,
> I experienced the same issue on my kx3 also. I was able to tighten it down
> enough with a wrench to keep it snug so far, but still keep an eye on it. I
> also thought abt locktite but didn't like the idea of introducing non
> conductive material between the case and the jack.
> 73's Mike AB7RU
>
> On May 26, 2018 8:01 AM, "Ryan Noguchi via Elecraft" <
> elecraft@mailman.qth.net> wrote:
>
> I recently bought and installed the KX3-2M transverter module in one of my
> KX3s and am enjoying a much better experience receiving the downlink from
> the Mode B AMSAT birds, compared to the TH-F6A I was using previously.
> Sensitivity and ergonomics are a huge improvement.
> Unfortunately, I find that the SMA connector loosens very quickly. I've
> already had to open the case and almost completely uninstall the
> transverter once (undoing and redoing everything except the internal coax
> connections) just to retighten the nut, and it's already worked itself
> loose again. Does anyone have a trick they used to keep the nut from
> loosening? I can't get a lot of leverage with needlenose pliers with such a
> skinny nut in such close proximity to fragile components, and the thin
> lockwasher doesn't seem to be very effective. I thought I had cranked it
> down pretty tight, but apparently not tight enough.
> I seems that it would have been better to have the separate nut on the
> outside end of the connector (like the connectors on the PX3), since those
> can be tightened up very easily from the outside.
> One option might be to use Blue Loctite. I don't think I'd ever need to
> remove it unless Elecraft comes up with a dual-band (2M and 70CM) internal
> transverter to replace it, but this option would likely be  permanent since
> I don't think I could get enough mechanical leverage to break the Loctite
> and don't think heating up the connector to loosen the Loctite would be a
> good idea.
> Any better ideas?
> Thanks and 73, Ryan AI6DO
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Re: [Elecraft] KX3 2M module SMA connector loosening

[Mike Parkes]

Ryan,
I experienced the same issue on my kx3 also. I was able to tighten it down
enough with a wrench to keep it snug so far, but still keep an eye on it. I
also thought abt locktite but didn't like the idea of introducing non
conductive material between the case and the jack.
73's Mike AB7RU

On May 26, 2018 8:01 AM, "Ryan Noguchi via Elecraft" <
elecraft@mailman.qth.net> wrote:

I recently bought and installed the KX3-2M transverter module in one of my
KX3s and am enjoying a much better experience receiving the downlink from
the Mode B AMSAT birds, compared to the TH-F6A I was using previously.
Sensitivity and ergonomics are a huge improvement.
Unfortunately, I find that the SMA connector loosens very quickly. I've
already had to open the case and almost completely uninstall the
transverter once (undoing and redoing everything except the internal coax
connections) just to retighten the nut, and it's already worked itself
loose again. Does anyone have a trick they used to keep the nut from
loosening? I can't get a lot of leverage with needlenose pliers with such a
skinny nut in such close proximity to fragile components, and the thin
lockwasher doesn't seem to be very effective. I thought I had cranked it
down pretty tight, but apparently not tight enough.
I seems that it would have been better to have the separate nut on the
outside end of the connector (like the connectors on the PX3), since those
can be tightened up very easily from the outside.
One option might be to use Blue Loctite. I don't think I'd ever need to
remove it unless Elecraft comes up with a dual-band (2M and 70CM) internal
transverter to replace it, but this option would likely be  permanent since
I don't think I could get enough mechanical leverage to break the Loctite
and don't think heating up the connector to loosen the Loctite would be a
good idea.
Any better ideas?
Thanks and 73, Ryan AI6DO
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[Elecraft] KX3 2M module SMA connector loosening

[Ryan Noguchi via Elecraft]

I recently bought and installed the KX3-2M transverter module in one of my KX3s 
and am enjoying a much better experience receiving the downlink from the Mode B 
AMSAT birds, compared to the TH-F6A I was using previously. Sensitivity and 
ergonomics are a huge improvement.  
Unfortunately, I find that the SMA connector loosens very quickly. I've already 
had to open the case and almost completely uninstall the transverter once 
(undoing and redoing everything except the internal coax connections) just to 
retighten the nut, and it's already worked itself loose again. Does anyone have 
a trick they used to keep the nut from loosening? I can't get a lot of leverage 
with needlenose pliers with such a skinny nut in such close proximity to 
fragile components, and the thin lockwasher doesn't seem to be very effective. 
I thought I had cranked it down pretty tight, but apparently not tight enough. 
I seems that it would have been better to have the separate nut on the outside 
end of the connector (like the connectors on the PX3), since those can be 
tightened up very easily from the outside. 
One option might be to use Blue Loctite. I don't think I'd ever need to remove 
it unless Elecraft comes up with a dual-band (2M and 70CM) internal transverter 
to replace it, but this option would likely be  permanent since I don't think I 
could get enough mechanical leverage to break the Loctite and don't think 
heating up the connector to loosen the Loctite would be a good idea. 
Any better ideas?
Thanks and 73, Ryan AI6DO
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[Elecraft] KX3 + 2m transverter + JT65

[phil]

Hi Everyone,

I've just joined the list to ask a quick question - Is there anyone here 
who has actually tried 2m JT65 using a KX3 with the 2m transverter module?


I understand that due to the KX3 temperature compensation system 
correcting drift in steps, that JT56 may not work on 2m, although I've 
been unable to find any reference to someone having actually just tried 
it to see if it works.


And if it doesn't work, if there are any workarounds - e.g. would 
operating the radio with the case open and a fan cooling the RF board 
help the situation?


I'm keen to have a go at EME and apart from this issue have everything I 
need sorted out, so I'm hoping this issue isn't going to be a deal-breaker.


Phil G4PWO


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Re: [Elecraft] KX3-2M SMA connector issue

[Mike Parkes]

James,
I ended up pulling out the 2 meter board and the tuner board (that was
about all it takes to get back to the SMA connector) and really tightened
the inside screw down a lot more torque than I did the first time. I think
I was over cautious when I first assembled the SMA connector. Sure didn't
want to start gouging out the opening in the case! So it has been fine
since then, however I have been a little more carful when moving the KX3
around with the sma right angle and the whip 2m/440 antenna. I think having
a right angle connector there is a little futzy. I have used the radio like
a handheld and just attached the whip antenna to the sma direct (wo the
right angle adapter) and that works fine. It is actually fun! The heaviest
biggest 2 meter ht I ever used since my first HT a Motorola brick lol/
Kinda makes me wish I had gone with the KX2 as It has a built in Mic which
is cool. But I love my KX3. I did design a little attachment that bolts to
the case and that works, but it is rinky dink. but it does make sure the
antenna is supported up from the base so that there is no way it can flop
over then. I will send a pic of that to you and the group if anyone wants
to see it.
Sri it took me a while to get back to you! I need to get my list
subscription back to individual emails, have not been able to keep up with
replies as easy when it is digest form. So Thank You! To anyone else who
replied on this issue (which isn't really an issue just a matter of making
sure the SMA connector is mounted securely).

I did notice that as I tightened it down snug that there was no evidence
that the outside flange (the flange/nut that Elecraft somehow made sure
would turn around the threads, don't ask me how they did that!) Anyway it
seems that the lock washers bite in pretty well and prevents the connector
from turning in the opening. The other option is to look for a beefier lock
washer... not sure if one of those split ring type lock washers would give
more tension? Anyway... I am shopping for some kind of external 2 meter
antenna now, so probably won't be using the whip antenna that much
eventually. Could make a j-pole. I am below ground here so it is a
challenge to get a good signal out on 2 meters. Anyway. thanks again.
probably told you way more than you wanted to read hihi.

73 Merry Christmas to you James~! hope you have a great holiday season. I
plan on Santa bringing me all kinds of ham test equipment. Signal
Generator, Freq counters antennas analyzers you name it.
Mike AB7RU

On Mon, Nov 27, 2017 at 9:01 AM, James Austin  wrote:

> Hi Mike,
>
> Did you get any useful off list replies to this question? I've had the
> same problem.
>
> Jim/KA2RVO
>
> On Sun, Nov 19, 2017 at 9:49 PM, Mike Parkes  wrote:
>
>> I ordered the *KX3*-*2M for the KX3 and installed it yesterday, seems to
>> be
>> working great. However... now I have an issue with the SMA connector
>> coming
>> loose one me after only a few times placing the Elecraft 2m/440 whip
>> antenna on and off.*
>>
>> *I was pretty careful to make sure the SMA antenna connector was mounted
>> securely. The instructions warned about overtightening. So I tightened it
>> down as much as seemed right. With lock washer compressed, I would have
>> thought it would be fine. Apparently not. *
>>
>> *So now I have to break the thing back down to get to the antenna mount
>> and
>> retighten. Anyone else have issues with this and how did you resolve? I
>> almost wonder if some locktite would help?*
>>
>> *Thanks! Mike AB7RU*
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>
>
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[Elecraft] KX3-2M SMA connector issue

[Mike Parkes]

I ordered the *KX3*-*2M for the KX3 and installed it yesterday, seems to be
working great. However... now I have an issue with the SMA connector coming
loose one me after only a few times placing the Elecraft 2m/440 whip
antenna on and off.*

*I was pretty careful to make sure the SMA antenna connector was mounted
securely. The instructions warned about overtightening. So I tightened it
down as much as seemed right. With lock washer compressed, I would have
thought it would be fine. Apparently not. *

*So now I have to break the thing back down to get to the antenna mount and
retighten. Anyone else have issues with this and how did you resolve? I
almost wonder if some locktite would help?*

*Thanks! Mike AB7RU*
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[Elecraft] KX3 + 2M For Sale -- Update SOLD

[Phil Hystad]

KX3 has been SOLD.

> Begin forwarded message:
> 
> From: Phil Hystad 
> Subject: KX3 + 2M For Sale -- Update
> Date: February 28, 2017 at 9:31:21 AM PST
> To: Elecraft Reflector Reflector 
> 
> I am selling my KX3 which includes the 2-meter option.  Full complement of 
> options and features include:
> 
> — KX3 160-6M Transceiver (Serial number #2148)
> — KXAT3 Internal wide range 20-watt automatic tuner
> — KXBC3 Internal NiMH Charger with Real-time Clock
> — KXFL3 Dual-Passband Roofing Filter
> — MH3 Hand-microphone
> — KXUSB USB Interface Cable
> — KX3-2M-AT 2-Meter Module for KX3 with ATU
> 
> A fully equipped KX3 in perfect operating condition with no dings, marks, or 
> other problems.  Of course a
> non-smoking environment.  
> 
> The 2-meter module was installed by Elecraft and calibrated and operates 
> perfectly.
> 
> In addition to the above list, the package will include all documentation 
> that came with the KX3 and the 2-meter option as well as various cables and 
> connectors. Also included is the Fred Cady Elecraft KX3 Manual.
> 
> Price:  $1375 OBO plus packing and shipping fees for CONUS delivery.
> 
> Please contact off of the group.
> 
> 73, phil, K7PEH

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[Elecraft] KX3 + 2M For Sale -- Update

[Phil Hystad]

I am selling my KX3 which includes the 2-meter option.  Full complement of 
options and features include:

— KX3 160-6M Transceiver (Serial number #2148)
— KXAT3 Internal wide range 20-watt automatic tuner
— KXBC3 Internal NiMH Charger with Real-time Clock
— KXFL3 Dual-Passband Roofing Filter
— MH3 Hand-microphone
— KXUSB USB Interface Cable
— KX3-2M-AT 2-Meter Module for KX3 with ATU

A fully equipped KX3 in perfect operating condition with no dings, marks, or 
other problems.  Of course a
non-smoking environment.  

The 2-meter module was installed by Elecraft and calibrated and operates 
perfectly.

In addition to the above list, the package will include all documentation that 
came with the KX3 and the 2-meter option as well as various cables and 
connectors. Also included is the Fred Cady Elecraft KX3 Manual.

Price:  $1375 OBO plus packing and shipping fees for CONUS delivery.

Please contact off of the group.

73, phil, K7PEH
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Re: [Elecraft] KX3 2M module install -- HELP

[GRANT YOUNGMAN]

Yes, several times.  Just looks like a minor glitch.  See my note below.

Thanks … Grant NQ5T


> On Feb 3, 2017, at 3:51 PM, GRANT YOUNGMAN  wrote:
> 
> Never mind …
> 
> Apparently it was just some garbage in VFO A.  VFO B was on 144.00 where it 
> should have been.  A swap and copy of VFOs fixed the problem.
> 
> 
>> On Feb 3, 2017, at 3:37 PM, GRANT YOUNGMAN  wrote:
>> 
>> Before I call tech support, thought I’d try here.
>> 
>> Just installed in the 2M module in my KX3. I’m on the latest firmware rev.  
>> Gone over the setup instructions several times, and the parameters are all 
>> set properly — enabled, 50 Mhz IF, in the band map, etc.
>> 
>> When I go to the 2M band, the display comes up 122.000.00  ?
>> 
>> Anyone have an idea?
>> 
>> Thanks ...
>> Grant NQ5T
>> K3 #2091, KX3 #8342
>> 
>> 
>> 
> 
> Grant NQ5T
> K3 #2091, KX3 #8342
> 

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Re: [Elecraft] KX3 2M module install -- HELP

[Bob N3MNT]

Have you shut down the radio and restarted it?




--
View this message in context: 
http://elecraft.365791.n2.nabble.com/KX3-2M-module-install-HELP-tp7626439p7626442.html
Sent from the Elecraft mailing list archive at Nabble.com.
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Re: [Elecraft] KX3 2M module install -- HELP

[GRANT YOUNGMAN]

Never mind …

Apparently it was just some garbage in VFO A.  VFO B was on 144.00 where it 
should have been.  A swap and copy of VFOs fixed the problem.


> On Feb 3, 2017, at 3:37 PM, GRANT YOUNGMAN  wrote:
> 
> Before I call tech support, thought I’d try here.
> 
> Just installed in the 2M module in my KX3. I’m on the latest firmware rev.  
> Gone over the setup instructions several times, and the parameters are all 
> set properly — enabled, 50 Mhz IF, in the band map, etc.
> 
> When I go to the 2M band, the display comes up 122.000.00  ?
> 
> Anyone have an idea?
> 
> Thanks ...
> Grant NQ5T
> K3 #2091, KX3 #8342
> 
> 
> 

Grant NQ5T
K3 #2091, KX3 #8342



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[Elecraft] KX3 2M module install -- HELP

[GRANT YOUNGMAN]

Before I call tech support, thought I’d try here.

Just installed in the 2M module in my KX3. I’m on the latest firmware rev.  
Gone over the setup instructions several times, and the parameters are all set 
properly — enabled, 50 Mhz IF, in the band map, etc.

When I go to the 2M band, the display comes up 122.000.00  ?

Anyone have an idea?

Thanks ...
Grant NQ5T
K3 #2091, KX3 #8342



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Re: [Elecraft] KX3 2M External amp -- go linear!

[Edward R Cole]

Joel and all:

The 80w amplifier I build is the Klitzing amp described, below.

I purchase the unpopulated pc board from Jim and order all other 
components.  I install them in  Hammond enclosure with same heat sink 
Jim recommends, plus a 120mm square fan controlled by a 
thermistor-based ckt.  I also add a bar meter which indicates 
relative output.  I also use the ALC kit from Jim to sample RF power 
for the meter.


It runs with 8amp quiescent current at near class-A operation so very 
linear in output.  No preamp is included but the TR relay allows 
bypass in OFF so you do not need to disconnect the amp if not 
needed.  I agree with Joel that there are better preamps than 
typically embedded in most ham VHF amps.


I handle PayPal sales for the popular WA2ODO preamps (6m-13cm).

73, Ed - KL7UW


snipped-
I convinced Jim to design and build an amplifier that would make my K3
competitive with the typical 100 W HF-VHF transceivers. With my great
receiver and 10 W transmitter, I was hearing people and they weren't hearing
me. By staying at the 100 W level, I could use the same power supply that my
K3 used for HF. I have been using the amplifier for years and been very
happy with it. It is very linear up to 80 W PEP out on SSB, but happy to do
CW and FM at 100 W. See the article at:

May 2013 -- QST (p. 30)
Build a Linear 2 Meter 80 W All Mode Amplifier


Jim offers PC boards, unpopulated, as well as largely complete, for
reasonable prices via his web page at w6pql.com. This amplifier is the size
of a brick, probably costs less and is a much better product, in my view. I
recommend it without reservation.

Regards, Joel Hallas, W1ZR
Westport, CT


73, Ed - KL7UW
http://www.kl7uw.com
"Kits made by KL7UW"
Dubus Mag business:
dubus...@gmail.com

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Re: [Elecraft] KX3 2m external amplifier

[Jim Brown]

That would be great, Mel.

I think I probably have about 8 brick amps of this generation carrying 
the Mirage and RF Concepts nameplate. Up to now, I've never looked at 
their spectral performance, and I don't have an easy way to do so with 
the frequency resolution of the P3, because I have only one 2M CW 
transceiver. OTOH, I could probably borrow a second one from W6GJB.


The most practical test I currently know of for IM performance is 
transmitting CW dits in the range of 35WPM and looking at the occupied 
bandwidth on a P3 with a display bandwidth on the order of 10 kHz.


73, Jim

On Fri,7/29/2016 12:57 PM, Mel Farrer wrote:
If anyone needs information on the older KLM/Mirage amplifiers, I have 
some of the original documentation when I was at KLM/Mirage in the 
'70/'80 time period. Would be glad to share.


Mel, K6KBE
One of the founders of KLM Electronics



*From:* Jim Brown 
*To:* elecraft@mailman.qth.net
*Sent:* Friday, July 29, 2016 12:15 PM
*Subject:* Re: [Elecraft] KX3 2m external amplifier

On Fri,7/29/2016 10:31 AM, Ron D'Eau Claire wrote:
> Are those capable of linear operation for SSB as the poster asked? 
The ones

> I had back then were non-linear (class C) strictly for FM/CW only.

CW is 100% modulation of a carrier by a rectangular wave, so the
harmonics associated with rise and fall times create at least as much
distortion as SSB. That distortion shows up in the form of clicky
sidebands. It's quite easy to see these sidebands on a P3. Here's some
work I did a year or two ago measuring some rigs that were available 
to me.


http://k9yc.com/P3_Spectrum_Measurements.pdf

The second file contains much of the same data, but focuses on
improvements made by firmware upgrades to the FTDX5000 a year or two ago.

http://k9yc.com/FTDX5000_Report.pdf


73, Jim K9YC

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Re: [Elecraft] KX3 2m external amplifier

[Mel Farrer via Elecraft]

If anyone needs information on the older KLM/Mirage amplifiers, I have some of 
the original documentation when I was at KLM/Mirage in the '70/'80 time period. 
Would be glad to share.

Mel, K6KBEOne of the founders of KLM Electronics


  From: Jim Brown 
 To: elecraft@mailman.qth.net 
 Sent: Friday, July 29, 2016 12:15 PM
 Subject: Re: [Elecraft] KX3 2m external amplifier
   
On Fri,7/29/2016 10:31 AM, Ron D'Eau Claire wrote:
> Are those capable of linear operation for SSB as the poster asked? The ones
> I had back then were non-linear (class C) strictly for FM/CW only.

CW is 100% modulation of a carrier by a rectangular wave, so the 
harmonics associated with rise and fall times create at least as much 
distortion as SSB. That distortion shows up in the form of clicky 
sidebands. It's quite easy to see these sidebands on a P3. Here's some 
work I did a year or two ago measuring some rigs that were available to me.

http://k9yc.com/P3_Spectrum_Measurements.pdf

The second file contains much of the same data, but focuses on 
improvements made by firmware upgrades to the FTDX5000 a year or two ago.

http://k9yc.com/FTDX5000_Report.pdf

73, Jim K9YC

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Re: [Elecraft] KX3 2m external amplifier

[Jim Brown]

On Fri,7/29/2016 10:31 AM, Ron D'Eau Claire wrote:

Are those capable of linear operation for SSB as the poster asked? The ones
I had back then were non-linear (class C) strictly for FM/CW only.


CW is 100% modulation of a carrier by a rectangular wave, so the 
harmonics associated with rise and fall times create at least as much 
distortion as SSB. That distortion shows up in the form of clicky 
sidebands. It's quite easy to see these sidebands on a P3. Here's some 
work I did a year or two ago measuring some rigs that were available to me.


http://k9yc.com/P3_Spectrum_Measurements.pdf

The second file contains much of the same data, but focuses on 
improvements made by firmware upgrades to the FTDX5000 a year or two ago.


http://k9yc.com/FTDX5000_Report.pdf

73, Jim K9YC

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Re: [Elecraft] KX3 2m external amplifier

[Mel Farrer via Elecraft]

All of the Mirage amplifiers called linear were just that.  Only special order 
FM repeater amplifiers could be Class C.
Mel, K6KBE


  From: Ron D'Eau Claire 
 To: elecraft@mailman.qth.net 
 Sent: Friday, July 29, 2016 10:31 AM
 Subject: Re: [Elecraft] KX3 2m external amplifier
   
Are those capable of linear operation for SSB as the poster asked? The ones
I had back then were non-linear (class C) strictly for FM/CW only. 

73, Ron AC7AC

-Original Message-

Several years ago, we searched for and acquired vintage (30 year old) brick
amps that drive with either 2W or 10W for an output of about 150W. 
They have built-in preamps. These vintage amps were made during the 70s and
80s with the Mirage and RF Concepts name, and were built in Northern
California. They also made versions of these amps that required higher drive
levels -- 30W and 50W, I think, and they also made versions for
440 MHz. I own some of those too, which I use with the FM rig in my shack.
The Mirage name was later bought by MFJ. We found four of these vintage amps
in good condition in a few days simply by asking on two local club
reflectors. I don't remember what we paid, but I do know that we considered
them a bargain. :)

Those older amps are a great fit to an Elecraft rig with an Elecraft
transverter. We use the version that drives with 2W so that we can run the
transverter at the lowest possible power, thus reducing heat.

73, Jim K9YC


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Re: [Elecraft] KX3 2m external amplifier

[Ron D'Eau Claire]

Are those capable of linear operation for SSB as the poster asked? The ones
I had back then were non-linear (class C) strictly for FM/CW only. 

73, Ron AC7AC

-Original Message-

Several years ago, we searched for and acquired vintage (30 year old) brick
amps that drive with either 2W or 10W for an output of about 150W. 
They have built-in preamps. These vintage amps were made during the 70s and
80s with the Mirage and RF Concepts name, and were built in Northern
California. They also made versions of these amps that required higher drive
levels -- 30W and 50W, I think, and they also made versions for
440 MHz. I own some of those too, which I use with the FM rig in my shack.
The Mirage name was later bought by MFJ. We found four of these vintage amps
in good condition in a few days simply by asking on two local club
reflectors. I don't remember what we paid, but I do know that we considered
them a bargain. :)

Those older amps are a great fit to an Elecraft rig with an Elecraft
transverter. We use the version that drives with 2W so that we can run the
transverter at the lowest possible power, thus reducing heat.

73, Jim K9YC


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Re: [Elecraft] KX3 2M External amp -- go linear!

[Rick Robinson]

>
> If you want a real linear amp try to find a Teltec amp. Check out the QST
> review. I have one each for 2,220,& 432 .



-- 
Rick, W8ZT

Sent from Gmail Mobile
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Re: [Elecraft] KX3 2M External amp -- go linear!

[Joel Hallas]

While there are many amplifiers that can be pressed into service for SSB use
on 2 meters, most are really not designed for linear SSB use and have a high
level of IMD products if used for SSB. I spent a fair amount of effort
during my tenure at ARRL looking for an exception. While in general
operation in many areas, 2 meter IMD products will not likely be noticed by
casual operators due to the sparse number of operators on the band, in
contests -- when we find most 2 meter SSB and CW activity in my area -- it
is a different matter. 

The usual brick amplifier probably has a switch that says FM/SSB, but a look
behind the covers will indicate that this only changes the TR switching
time. Most have no bias arrangements and no hope to be close to linear. If
similar They would be run off the HF bands in minutes.

If you have access to QST, or are a member and can look at the archives on
line, I recommend reading the following product reviews with a close look at
IMD figures:

Aug 2010 - QST (Pg. 52)
A Pair of Mirage 2 Meter Amplifiers

Jan 2012 - QST (Pg. 54)
TE Systems 1410G 2 Meter Linear Amplifier

May 2012 - QST (Pg. 48)
Tokyo Hy-Power Labs HL-350VDX 2 Meter Linear Amplifier

The last amplifier worked really well in this regard and was a real gem.
Unfortunately, it was very expensive and the company is no longer in biz.

As to the preamps, the internal Elecraft transverters have a better noise
figure than the preamp in any brick amp that I have looked at. That means
that they are not particularly useful unless you have them mounted remotely
at the antenna and have a lossy coax run. 

My solution was inspired by an excellent QST article by Jim Klitzing, W6PQL:

Oct 2012 - QST (Pg. 32)
Solid State 1 kW Linear Amplifier for 2 Meters

Jim described an amplifier that was built around a linear amplifier module
that did all the heavy lifting. The rest of the amplifier was still more of
a project than I wanted to tackle, although I think it would work with the
transverters.

I convinced Jim to design and build an amplifier that would make my K3
competitive with the typical 100 W HF-VHF transceivers. With my great
receiver and 10 W transmitter, I was hearing people and they weren't hearing
me. By staying at the 100 W level, I could use the same power supply that my
K3 used for HF. I have been using the amplifier for years and been very
happy with it. It is very linear up to 80 W PEP out on SSB, but happy to do
CW and FM at 100 W. See the article at:

May 2013 -- QST (p. 30)
Build a Linear 2 Meter 80 W All Mode Amplifier


Jim offers PC boards, unpopulated, as well as largely complete, for
reasonable prices via his web page at w6pql.com. This amplifier is the size
of a brick, probably costs less and is a much better product, in my view. I
recommend it without reservation. 

Regards, Joel Hallas, W1ZR
Westport, CT




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Re: [Elecraft] KX3 2m external amplifier

[Edward R Cole]

Thanks to Mike and Bill for buying my 2M80 amps (assembled or partial 
kit).  I built twelve amps so far and most were to be driven by KX3's 
with 2M module.  I set nearly all amps to be driven by 1.5-2.0w so 
the KX3-2M would not have to run full power.  The 80w RF module that 
is used is not in production so now limited quantities available 
(from RFParts).  I have identified a replacement power module which 
should run 60-70w.


But there are quite few surplus 2m linear amps available.  Mirage, TE 
Systems, and RFConcepts.  I have a RFC 2-23 linear which runs 2w/30w 
and RFC 3-17 linear which runs 40w/170w.  I have three 2m sources: an 
old FT736R (30w), DEMI 28-144 HP (50w) and the KX3-2M which not up to 
stuff running only 1.5w.  I use either the RFC 2-23 or a surplus MOT 
amp that runs 1w/60w (FM) with my KX3-2M.


I am not taking orders for a couple months as I am working on some of 
my own projects while summer wx is still here:
6m 1kW amp and possibly building a new 18x26 foot ham shack which 
will require running all new cables to my four towers and dish.  Take 
a look at the amps here: http://www.kl7uw.com/kits.htm


73, Ed
--

Ed, KL7UW, built me a nice 80w 2m amp for less than $400.
http://www.kl7uw.com

Mike


In a message dated 7/28/2016 12:54:12 P.M. Eastern Daylight Time,
dhand...@plantron.se writes:

Does  anyone use a KX3 + internal 2m transverter with an external amplifier?
I am  looking for any recommendations. I have looked at RM Italy LA-144
and  Mirage B-34-G. My intention is to use it with both FM and SSB. Does
anyone  have experience with one of these amplifiers?
--
73, Dirk  SA4DHT



73, Ed - KL7UW
http://www.kl7uw.com
"Kits made by KL7UW"
Dubus Mag business:
dubus...@gmail.com

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Re: [Elecraft] KX3 2m external amplifier

[Tim Tucker]

You can call the owner and talk to him yourself and make your own
determination on where they're made.  He has his name, address, and email
address right there - email and ask for his phone number.  I know quite a
few people (including myself) that have purchased several of those power
supplies direct from him and have not had any problem with RFI.  I have
also purchased one of the chinese versions that look the same and threw it
out almost immediately because it was so bad.  If you bought one direct
from him that was noisy, I'd call him up and send it back for him to
replace to test out his advertised 2 year warranty.

On Thu, Jul 28, 2016 at 5:44 PM, Josh Fiden  wrote:

> While I don't doubt that you're successfully using these, I previously
> looked into these supplies and find the claim that they are made in
> California to be highly questionable. At the least, I don't see where the
> products are marked "Made in USA" nor does it say this anywhere that I can
> find on their web site. They refer to copies as "offshore clones" and so
> on, but no where do they refer to their own supplies as made here. Selling
> 30A supplies for $50 full of hand inserted through hole components, it
> seems frankly impossible that they are manufactured using California labor.
>
> If you have information to the contrary, please post as I'd love to be
> wrong. Since we all own Elecraft gear, I'm guessing that many have the same
> strong preference for USA made products that I do.
>
> 73,
> Josh W6XU
>
> On 7/28/2016 5:00 PM, Tim Tucker wrote:
>
>> Not difficult to power, at all.  Just buy two of these 50 amp units and
>> run
>> them in parallel.  I've personally tested these in my shack and they work
>> great.  No RF hash visible on the panadapter on any band that I run.  And
>> they're made right here in California:
>>
>> http://www.12voltpowersupplies.us/
>>
>>
>>
>>
>>
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> Message delivered to ae...@worldwidedx.com
>



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Re: [Elecraft] KX3 2m external amplifier

[Jim Cox]

Thanks Jim for the information.  I certainly don’t want one of them in my 
shack.  Have used Astron PS for many years with excellent results, power and 
RFI wise..

73s Jim K4JAF

-Original Message- 
From: Jim Brown

Sent: Thursday, July 28, 2016 7:34 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KX3 2m external amplifier

On the recommendation of someone on this list, about a year ago I bought
one of the 350-12 units. It came with no documentation, and no
certification of compliance with anything. It is VERY NOISY, and nothing
I have tried has been able to make a dent in the noise.  Multiple chokes
on AC, multiple chokes on DC, and bypass caps on both AC and DC. It's
currently sitting on the shelf in my store room.

73, Jim K9YC

On Thu,7/28/2016 5:00 PM, Tim Tucker wrote:
Not difficult to power, at all.  Just buy two of these 50 amp units and 
run

them in parallel.  I've personally tested these in my shack and they work
great.  No RF hash visible on the panadapter on any band that I run.  And
they're made right here in California:

http://www.12voltpowersupplies.us/



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Re: [Elecraft] KX3 2m external amplifier

[Josh Fiden]

While I don't doubt that you're successfully using these, I previously 
looked into these supplies and find the claim that they are made in 
California to be highly questionable. At the least, I don't see where 
the products are marked "Made in USA" nor does it say this anywhere that 
I can find on their web site. They refer to copies as "offshore clones" 
and so on, but no where do they refer to their own supplies as made 
here. Selling 30A supplies for $50 full of hand inserted through hole 
components, it seems frankly impossible that they are manufactured using 
California labor.


If you have information to the contrary, please post as I'd love to be 
wrong. Since we all own Elecraft gear, I'm guessing that many have the 
same strong preference for USA made products that I do.


73,
Josh W6XU

On 7/28/2016 5:00 PM, Tim Tucker wrote:

Not difficult to power, at all.  Just buy two of these 50 amp units and run
them in parallel.  I've personally tested these in my shack and they work
great.  No RF hash visible on the panadapter on any band that I run.  And
they're made right here in California:

http://www.12voltpowersupplies.us/






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Re: [Elecraft] KX3 2m external amplifier

[Clay Autery]

Thanks Jim...  I was going to try one of those to test the claims
made...  Even had someone offer to pay me my cost +$10 if I decided I
didn't want it after testing...

The business owner claims they are "quiet" and says there are
"counterfeits" being passed off as "his" power supplies.

Really would be nice to have a SMPS that was quiet, modular, and able to
be put in parallel for more power out...

__
Clay Autery, KY5G
MONTAC Enterprises
(318) 518-1389

On 7/28/2016 7:34 PM, Jim Brown wrote:
> On the recommendation of someone on this list, about a year ago I
> bought one of the 350-12 units. It came with no documentation, and no
> certification of compliance with anything. It is VERY NOISY, and
> nothing I have tried has been able to make a dent in the noise. 
> Multiple chokes on AC, multiple chokes on DC, and bypass caps on both
> AC and DC. It's currently sitting on the shelf in my store room.
>
> 73, Jim K9YC
>
> On Thu,7/28/2016 5:00 PM, Tim Tucker wrote:
>> Not difficult to power, at all.  Just buy two of these 50 amp units
>> and run
>> them in parallel.  I've personally tested these in my shack and they
>> work
>> great.  No RF hash visible on the panadapter on any band that I run. 
>> And
>> they're made right here in California:
>>
>> http://www.12voltpowersupplies.us/
>
>
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Re: [Elecraft] KX3 2m external amplifier

[Jim Brown]

On the recommendation of someone on this list, about a year ago I bought 
one of the 350-12 units. It came with no documentation, and no 
certification of compliance with anything. It is VERY NOISY, and nothing 
I have tried has been able to make a dent in the noise.  Multiple chokes 
on AC, multiple chokes on DC, and bypass caps on both AC and DC. It's 
currently sitting on the shelf in my store room.


73, Jim K9YC

On Thu,7/28/2016 5:00 PM, Tim Tucker wrote:

Not difficult to power, at all.  Just buy two of these 50 amp units and run
them in parallel.  I've personally tested these in my shack and they work
great.  No RF hash visible on the panadapter on any band that I run.  And
they're made right here in California:

http://www.12voltpowersupplies.us/



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Re: [Elecraft] KX3 2m external amplifier

[Tim Tucker]

Not difficult to power, at all.  Just buy two of these 50 amp units and run
them in parallel.  I've personally tested these in my shack and they work
great.  No RF hash visible on the panadapter on any band that I run.  And
they're made right here in California:

http://www.12voltpowersupplies.us/





On Thu, Jul 28, 2016 at 2:12 PM, Josh  wrote:

> Difficult to power, need a stiff supply that does 60A. Great amp but know
> what you're getting into.
>
> 73,
> Josh W6XU
>
> Sent from my mobile device
>
> > On Jul 28, 2016, at 12:58 PM, Charlie T, K3ICH  wrote:
> >
> > My TE Systems 1452G amp puts out a tad under 400 watts with 4 watts
> drive.
> > AND it is biased for linear service.
> >
>
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Re: [Elecraft] KX3 2m external amplifier

[Robin Moseley]

Get a Gemini SSPAhttp://www.linamp.co.uk/gemini_2.html

Robin G1MHU 
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Re: [Elecraft] KX3 2m external amplifier

[Mike via Elecraft]

Ed, KL7UW, built me a nice 80w 2m amp for less than $400.  
http://www.kl7uw.com
 
Mike
 
 
In a message dated 7/28/2016 12:54:12 P.M. Eastern Daylight Time,  
dhand...@plantron.se writes:

Does  anyone use a KX3 + internal 2m transverter with an external amplifier?
I am  looking for any recommendations. I have looked at RM Italy LA-144
and  Mirage B-34-G. My intention is to use it with both FM and SSB. Does
anyone  have experience with one of these amplifiers?
-- 
73, Dirk  SA4DHT

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Re: [Elecraft] KX3 2m external amplifier

[Josh]

Difficult to power, need a stiff supply that does 60A. Great amp but know what 
you're getting into. 

73,
Josh W6XU

Sent from my mobile device

> On Jul 28, 2016, at 12:58 PM, Charlie T, K3ICH  wrote:
> 
> My TE Systems 1452G amp puts out a tad under 400 watts with 4 watts drive.
> AND it is biased for linear service.
> 

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Re: [Elecraft] KX3 2m external amplifier

[Wes Stewart]

K6PF on the CADXA Yahoo group is advertising (among other things) .

TE Systems 1410-G for 2m.  Xlnt condx.  10W in / 160W out.  Will drive above 
8877 HPA to legal limit pwr output with abt 7W.  Has built-in preamp.  Includes 
manual & schematic. Asking $225.



On 7/28/2016 12:08 PM, Mel Farrer via Elecraft wrote:

Any of the older ones rated at less than 10 watt in and a linear version not 
Class C will be fine.  I have used the KLM, Mirage and TPL units with success 
on two meters with various rigs both FM and SSB.  There are quite a few on the 
used market, just make sure it still works as advertised for rated output.

Good luck.
Mel, K6KBE
One of the founders of KLM Electronics


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Re: [Elecraft] KX3 2m external amplifier

[Bill Frantz]

I have a 2M amp about 80 watts from Edward R Cole, KL6UW. I 
drive it with my 5W HT. It seems to work well, although I just 
got it working a month or so ago and have been away most of the 
time since. Note that Ed will set it up for the drive level you need.


Pluses: Solidly built. Automatic T/R switching, or by control wire.

Minuses: Little/no protective circuity. Class A so it draws a 
lot of power with no input.


I built mine as a kit and it was a fun build. Since I was an 
early adopter, I asked Ed a lot of questions and got very useful 
support throughout the process.


73 Bill AE6JV

On 7/28/16 at 9:50 AM, dhand...@plantron.se (Dirk Handzic) wrote:


Does anyone use a KX3 + internal 2m transverter with an external amplifier?
I am looking for any recommendations. I have looked at RM Italy LA-144
and Mirage B-34-G. My intention is to use it with both FM and SSB. Does
anyone have experience with one of these amplifiers?

---
Bill Frantz| "The only thing we have to   | Periwinkle
(408)356-8506  | fear is fear itself." - FDR  | 16345 
Englewood Ave
www.pwpconsult.com | Inaugural address, 3/4/1933  | Los Gatos, 
CA 95032


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Re: [Elecraft] KX3 2m external amplifier

[Charlie T, K3ICH]

My TE Systems 1452G amp puts out a tad under 400 watts with 4 watts drive.
AND it is biased for linear service.

73, Charlie k3ICH



-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Josh
Fiden
Sent: Thursday, July 28, 2016 3:34 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KX3 2m external amplifier

I've been very happy with a vintage RF Concepts 2-417. It's rated for 170W
out with 45W drive. However, I used it very successfully driving it from my
TH-F6A 5W HT. I never measured the output with that drive, but it was
clearly considerable. Also, the preamp is quite good. These are readily
available used, best guess is price around $175-250 for one in good condx.

73,
Josh W6XU


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Re: [Elecraft] KX3 2m external amplifier

[Josh Fiden]

I've been very happy with a vintage RF Concepts 2-417. It's rated for 
170W out with 45W drive. However, I used it very successfully driving it 
from my TH-F6A 5W HT. I never measured the output with that drive, but 
it was clearly considerable. Also, the preamp is quite good. These are 
readily available used, best guess is price around $175-250 for one in 
good condx.


73,
Josh W6XU


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Re: [Elecraft] KX3 2m external amplifier

[Mel Farrer via Elecraft]

Any of the older ones rated at less than 10 watt in and a linear version not 
Class C will be fine.  I have used the KLM, Mirage and TPL units with success 
on two meters with various rigs both FM and SSB.  There are quite a few on the 
used market, just make sure it still works as advertised for rated output.  

Good luck.
Mel, K6KBE 
One of the founders of KLM Electronics


  From: Clay Autery 
 To: elecraft@mailman.qth.net 
 Sent: Thursday, July 28, 2016 11:20 AM
 Subject: Re: [Elecraft] KX3 2m external amplifier
   
I need one of those...  Adding 2m as soon as I can.

Can you give me some better info on that low drive unit, Jim?  Bet one
of the guys around here has one they aren't using...

__
Clay Autery, KY5G
MONTAC Enterprises
(318) 518-1389

On 7/28/2016 12:09 PM, Jim Brown wrote:
> On Thu,7/28/2016 9:50 AM, Dirk Handzic wrote:
>> Does anyone use a KX3 + internal 2m transverter with an external
>> amplifier?
>
> My neighbor W6GJB and I both have K3s with Elecraft 2m transverters.
> His is internal, mine is external (I've owned it for more than ten
> years). Several years ago, we searched for and acquired vintage (30
> year old) brick amps that drive with either 2W or 10W for an output of
> about 150W. They have built-in preamps. These vintage amps were made
> during the 70s and 80s with the Mirage and RF Concepts name, and were
> built in Northern California. They also made versions of these amps
> that required higher drive levels -- 30W and 50W, I think, and they
> also made versions for 440 MHz. I own some of those too, which I use
> with the FM rig in my shack. The Mirage name was later bought by MFJ.
> We found four of these vintage amps in good condition in a few days
> simply by asking on two local club reflectors. I don't remember what
> we paid, but I do know that we considered them a bargain. :)
>
> Those older amps are a great fit to an Elecraft rig with an Elecraft
> transverter. We use the version that drives with 2W so that we can run
> the transverter at the lowest possible power, thus reducing heat.
>
> 73, Jim K9YC
>
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Re: [Elecraft] KX3 2m external amplifier

[Clay Autery]

I need one of those...  Adding 2m as soon as I can.

Can you give me some better info on that low drive unit, Jim?  Bet one
of the guys around here has one they aren't using...

__
Clay Autery, KY5G
MONTAC Enterprises
(318) 518-1389

On 7/28/2016 12:09 PM, Jim Brown wrote:
> On Thu,7/28/2016 9:50 AM, Dirk Handzic wrote:
>> Does anyone use a KX3 + internal 2m transverter with an external
>> amplifier?
>
> My neighbor W6GJB and I both have K3s with Elecraft 2m transverters.
> His is internal, mine is external (I've owned it for more than ten
> years). Several years ago, we searched for and acquired vintage (30
> year old) brick amps that drive with either 2W or 10W for an output of
> about 150W. They have built-in preamps. These vintage amps were made
> during the 70s and 80s with the Mirage and RF Concepts name, and were
> built in Northern California. They also made versions of these amps
> that required higher drive levels -- 30W and 50W, I think, and they
> also made versions for 440 MHz. I own some of those too, which I use
> with the FM rig in my shack. The Mirage name was later bought by MFJ.
> We found four of these vintage amps in good condition in a few days
> simply by asking on two local club reflectors. I don't remember what
> we paid, but I do know that we considered them a bargain. :)
>
> Those older amps are a great fit to an Elecraft rig with an Elecraft
> transverter. We use the version that drives with 2W so that we can run
> the transverter at the lowest possible power, thus reducing heat.
>
> 73, Jim K9YC
>
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Re: [Elecraft] KX3 2m external amplifier

[Tim Tucker]

I've used mine with the Mirage B-320-G quite a lot.  It works great, both
FM and SSB with no issues.  I've also used it with a little Tokyo Hi-Power
35 watt amp and had no issues, either.  There really isn't anything
complicated about getting the KX3 2m going with any amplifier - just make
sure the one you choose will deliver the power you're looking for with 3
watts or less input.

Tim
AE6LX

On Thu, Jul 28, 2016 at 9:50 AM, Dirk Handzic  wrote:

> Does anyone use a KX3 + internal 2m transverter with an external amplifier?
> I am looking for any recommendations. I have looked at RM Italy LA-144
> and Mirage B-34-G. My intention is to use it with both FM and SSB. Does
> anyone have experience with one of these amplifiers?
> --
> 73, Dirk SA4DHT
>
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>



-- 
Owner, worldwidedx.com
AE6LX, Amateur Radio
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Re: [Elecraft] KX3 2m external amplifier

[Jim Brown]

On Thu,7/28/2016 9:50 AM, Dirk Handzic wrote:

Does anyone use a KX3 + internal 2m transverter with an external amplifier?


My neighbor W6GJB and I both have K3s with Elecraft 2m transverters. His 
is internal, mine is external (I've owned it for more than ten years). 
Several years ago, we searched for and acquired vintage (30 year old) 
brick amps that drive with either 2W or 10W for an output of about 150W. 
They have built-in preamps. These vintage amps were made during the 70s 
and 80s with the Mirage and RF Concepts name, and were built in Northern 
California. They also made versions of these amps that required higher 
drive levels -- 30W and 50W, I think, and they also made versions for 
440 MHz. I own some of those too, which I use with the FM rig in my 
shack. The Mirage name was later bought by MFJ. We found four of these 
vintage amps in good condition in a few days simply by asking on two 
local club reflectors. I don't remember what we paid, but I do know that 
we considered them a bargain. :)


Those older amps are a great fit to an Elecraft rig with an Elecraft 
transverter. We use the version that drives with 2W so that we can run 
the transverter at the lowest possible power, thus reducing heat.


73, Jim K9YC

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[Elecraft] KX3 2m external amplifier

[Dirk Handzic]

Does anyone use a KX3 + internal 2m transverter with an external amplifier?
I am looking for any recommendations. I have looked at RM Italy LA-144
and Mirage B-34-G. My intention is to use it with both FM and SSB. Does
anyone have experience with one of these amplifiers?
-- 
73, Dirk SA4DHT

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[Elecraft] KX3-2M power output

[KarlErb]

Has anyone verified the module's output between 0.1 and 0.5 watts?  My 
(inexpensive) external meter tracks the KX3 settings above 0.6 but not below.  
Thanks, 
Karl W3BF
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Re: [Elecraft] KX3 2m Install

[Ron D'Eau Claire]

Thanks Bruce: If that capacitor is no longer an issue we don’t want to be 
asking builders to look for it, Hi! 

 

I’ll look into the TO-220 issue. As long as it’s tightly clamped by the screw, 
it should provide good heat transfer to the case. 

 

73, Ron AC7AC

 

From: Bruce Nourish [mailto:w0...@w0mbt.net] 
Sent: Monday, April 25, 2016 8:55 PM
To: Ron D'Eau Claire; Elecraft Reflector
Subject: Re: [Elecraft] KX3 2m Install

 

Yes, sorry, C180, not C120. Not that I'm complaining, its absence made assembly 
easier.

 

Re: TO-220. If you look at Fig 24 (bottom of p28) in the instructions, you'll 
see TO-220 "leaning back" inwards from the side of the case, loosely held by 
the nylon screw. My TO-220 looked like that before I inserted the module -- so 
far so good. 

 

When I inserted the module, the transistor heat sink went into the gap between 
the top of TO-220 and the case. I wiggled it a bit until the hole in the heat 
sink, and the top hole of TO-220 approximately lined up. I was able to screw in 
the metal Phillips screw fine, so the heat sink should have a good connection 
to the case. But TO-220 was still "leaning back", meaning that the bottom hole 
of TO-220 was still at an angle. I tried unscrewing both screws, but the 
heatsink had wedged TO-220 firmly at that angle.

 

Bruce

 

On Mon, Apr 25, 2016 at 8:17 PM Ron D'Eau Claire  wrote:

Hi Bruce:

Are talking about C180 near J4? I'll check into it. It won't be the first
time the engineers made a change and didn't realize it impacted the assembly
instructions (I'm 600 miles from Watsonville, but only milliseconds by voice
and e-mail. Still that can be "light years" at times, Hi!)

I'm not sure what could put the TO-220 screw at an angle. The TO-220 heat
sink simply slips in between the retainer, which is then pulled tightly
against the TO-220 heat sink and the side of the case. That's the critical
part - good mechanical and thermal contact between the TO-220 heat sink and
the side of the case.

Have you tried loosening both screws and then re-tightening them? What comes
to mind is that in tightening the top screw, the retainer might have turned
slightly, misaligning the bottom screw in the hole. With everything in
place. Loosen both screws a bit, then retighten the bottom (nylon) screw to
hold the retainer, then tighten the top screw and see if things line up
better.

I'd appreciate hearing if that works either at my address on this message or
r...@elecraft.com.

73. Ron AC7AC

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bruce
Nourish
Sent: Monday, April 25, 2016 5:37 PM
To: Elecraft Reflector
Subject: [Elecraft] KX3 2m Install

Hi folks,

Last night I installed and configured a KX3 2m module following the current
instructions on the website (Rev C). My KX3 is a recent factory build.
Everything seems to be working fine; I haven't actually tried it on-air yet
(need to finish my 2m Moxon), but at least I didn't blow my rig up.

I encountered one difference with the instructions: When installing the LO
coax on J4, I could not find any capacitor C120 to avoid. My KX3 simply
doesn't have C120 or R81 on that PCB. Has something changed in recent KX3s?

The only hard part was the final installation, specifically clamping the
heatsink lug properly with retainer TO-220. It seems like the clamping
arrangement unavoidably puts the nylon bottom screw at a weird angle. I
double-checked the orientation of TO-220 and redid these steps over several
times, and couldn't figure out any other way to make it work. Is this right?
If so, a clarification in the instructions would help.

Bruce
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Re: [Elecraft] KX3 2m Install

[Bruce Nourish]

Yes, sorry, C180, not C120. Not that I'm complaining, its absence made
assembly easier.

Re: TO-220. If you look at Fig 24 (bottom of p28) in the instructions,
you'll see TO-220 "leaning back" inwards from the side of the case, loosely
held by the nylon screw. My TO-220 looked like that before I inserted the
module -- so far so good.

When I inserted the module, the transistor heat sink went into the gap
between the top of TO-220 and the case. I wiggled it a bit until the hole
in the heat sink, and the top hole of TO-220 approximately lined up. I was
able to screw in the metal Phillips screw fine, so the heat sink should
have a good connection to the case. But TO-220 was still "leaning back",
meaning that the bottom hole of TO-220 was still at an angle. I tried
unscrewing both screws, but the heatsink had wedged TO-220 firmly at that
angle.

Bruce

On Mon, Apr 25, 2016 at 8:17 PM Ron D'Eau Claire  wrote:

> Hi Bruce:
>
> Are talking about C180 near J4? I'll check into it. It won't be the first
> time the engineers made a change and didn't realize it impacted the
> assembly
> instructions (I'm 600 miles from Watsonville, but only milliseconds by
> voice
> and e-mail. Still that can be "light years" at times, Hi!)
>
> I'm not sure what could put the TO-220 screw at an angle. The TO-220 heat
> sink simply slips in between the retainer, which is then pulled tightly
> against the TO-220 heat sink and the side of the case. That's the critical
> part - good mechanical and thermal contact between the TO-220 heat sink and
> the side of the case.
>
> Have you tried loosening both screws and then re-tightening them? What
> comes
> to mind is that in tightening the top screw, the retainer might have turned
> slightly, misaligning the bottom screw in the hole. With everything in
> place. Loosen both screws a bit, then retighten the bottom (nylon) screw to
> hold the retainer, then tighten the top screw and see if things line up
> better.
>
> I'd appreciate hearing if that works either at my address on this message
> or
> r...@elecraft.com.
>
> 73. Ron AC7AC
>
> -Original Message-----
> From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
> Bruce
> Nourish
> Sent: Monday, April 25, 2016 5:37 PM
> To: Elecraft Reflector
> Subject: [Elecraft] KX3 2m Install
>
> Hi folks,
>
> Last night I installed and configured a KX3 2m module following the current
> instructions on the website (Rev C). My KX3 is a recent factory build.
> Everything seems to be working fine; I haven't actually tried it on-air yet
> (need to finish my 2m Moxon), but at least I didn't blow my rig up.
>
> I encountered one difference with the instructions: When installing the LO
> coax on J4, I could not find any capacitor C120 to avoid. My KX3 simply
> doesn't have C120 or R81 on that PCB. Has something changed in recent KX3s?
>
> The only hard part was the final installation, specifically clamping the
> heatsink lug properly with retainer TO-220. It seems like the clamping
> arrangement unavoidably puts the nylon bottom screw at a weird angle. I
> double-checked the orientation of TO-220 and redid these steps over several
> times, and couldn't figure out any other way to make it work. Is this
> right?
> If so, a clarification in the instructions would help.
>
> Bruce
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>
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Re: [Elecraft] KX3 2m Install

[Ron D'Eau Claire]

Hi Bruce:

Are talking about C180 near J4? I'll check into it. It won't be the first
time the engineers made a change and didn't realize it impacted the assembly
instructions (I'm 600 miles from Watsonville, but only milliseconds by voice
and e-mail. Still that can be "light years" at times, Hi!) 

I'm not sure what could put the TO-220 screw at an angle. The TO-220 heat
sink simply slips in between the retainer, which is then pulled tightly
against the TO-220 heat sink and the side of the case. That's the critical
part - good mechanical and thermal contact between the TO-220 heat sink and
the side of the case. 

Have you tried loosening both screws and then re-tightening them? What comes
to mind is that in tightening the top screw, the retainer might have turned
slightly, misaligning the bottom screw in the hole. With everything in
place. Loosen both screws a bit, then retighten the bottom (nylon) screw to
hold the retainer, then tighten the top screw and see if things line up
better. 

I'd appreciate hearing if that works either at my address on this message or
r...@elecraft.com. 

73. Ron AC7AC

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bruce
Nourish
Sent: Monday, April 25, 2016 5:37 PM
To: Elecraft Reflector
Subject: [Elecraft] KX3 2m Install

Hi folks,

Last night I installed and configured a KX3 2m module following the current
instructions on the website (Rev C). My KX3 is a recent factory build.
Everything seems to be working fine; I haven't actually tried it on-air yet
(need to finish my 2m Moxon), but at least I didn't blow my rig up.

I encountered one difference with the instructions: When installing the LO
coax on J4, I could not find any capacitor C120 to avoid. My KX3 simply
doesn't have C120 or R81 on that PCB. Has something changed in recent KX3s?

The only hard part was the final installation, specifically clamping the
heatsink lug properly with retainer TO-220. It seems like the clamping
arrangement unavoidably puts the nylon bottom screw at a weird angle. I
double-checked the orientation of TO-220 and redid these steps over several
times, and couldn't figure out any other way to make it work. Is this right?
If so, a clarification in the instructions would help.

Bruce
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[Elecraft] KX3 2m Install

[Bruce Nourish]

Hi folks,

Last night I installed and configured a KX3 2m module following the current
instructions on the website (Rev C). My KX3 is a recent factory build.
Everything seems to be working fine; I haven't actually tried it on-air yet
(need to finish my 2m Moxon), but at least I didn't blow my rig up.

I encountered one difference with the instructions: When installing the LO
coax on J4, I could not find any capacitor C120 to avoid. My KX3 simply
doesn't have C120 or R81 on that PCB. Has something changed in recent KX3s?

The only hard part was the final installation, specifically clamping the
heatsink lug properly with retainer TO-220. It seems like the clamping
arrangement unavoidably puts the nylon bottom screw at a weird angle. I
double-checked the orientation of TO-220 and redid these steps over several
times, and couldn't figure out any other way to make it work. Is this right? If
so, a clarification in the instructions would help.

Bruce
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[Elecraft] KX3 2M Overheating

[n1ko]

Hi All,

I haven't used my KX3 2M option in a while, but just turned it on to work
some local FM repeaters and I'm having an issue with it overheating very
rapidly and cutting out.  I worked some HF over the weekend with no issues. 
The SWR indication is normal, and the issue occurs with multiple 2M
antennas, and in both FM, SSB and "tune" mode, and the 2M PA seems to
overheat and cut out rapidly even when I turn the transmit power down to
0.1W.

Any ideas?  This symptom seems ominous.

Tnx,

Adam, N1KO



--
View this message in context: 
http://elecraft.365791.n2.nabble.com/KX3-2M-Overheating-tp7614533.html
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Re: [Elecraft] KX3 2m: how to get +TX voltage during transmission?

[Jack F6AJW]

Great! It works! Thank you Fred for valuable info! Thank also to Mat for 
advise (usable on BNC out for lower frequencies like IF on 28 or 50 MHz) .


So, I will be QRV this afternoon (despite heat wave: 35°C!) on 10 GHz 
with my KX3 as 2m IF (better than my usual FT-817ND on RX).


73's.

Jacques F6AJW/75

Le 03/07/2015 23:54, Cady, Fred a écrit :

Here ya go:

When in the 2M/4M menu, tap  2  to toggle between TX 5V- (the default) and TX 
5V+.  When TX 5V+ is enabled, 5 VDC (± 0.3 v at 0.1 mA) is applied to the 
center pin of ANT 2 when transmitting.  This can be used to switch or control 
external devices such as additional transverters that use 144 or 70 MHz as 
their IF.

Cheers and 73,
Fred KE7X

Author of:
"The Elecraft K3: Design, Configuration and Operation 2nd ed"
"The Elecraft KX3 - Going for the summit"
"The Elecraft KPA500 and KAT500 - the K-Line Dream Station"
Printed, coil bound copies of these are all available at www.elecraft.com
KPA500 and KAT500 Quick Set Up Guide
http://www.ke7x.com/home/k-line-introduction-and-set-up-guide
KAT500 and KXPA500 Tuner Operation
http://www.ke7x.com/home/kat500-and-kxpa100-tuners

"The Elecraft KXPA100, PX3 and 2M/4M Transverters - Assembling the KX3-Line 
Station" available at www.lulu.com.

"The Elecraft K3S and P3"  (A work in progress)


-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
Matt Zilmer
Sent: Friday, July 03, 2015 11:47 AM
To: Jack F6AJW
Cc: Elecraft Reflector
Subject: Re: [Elecraft] KX3 2m: how to get +TX voltage during
transmission?

Maybe... Use a bias T with the DC feeding torwards the transverters?
The ACC2 keyline (p5, Owner's Manual) is pulled low during transmit and
could be used to activate a FET or bipolar switch to 12VDC.

73,
matt
W6NIA
On Fri, 3 Jul 2015 19:37:52 +0200, you wrote:


Hello All Elecrafters,

I have a KX3 2m; I don't know how to configurate it in order to

command

DB6NT microwave transverters needing +TX voltage present on SMA
connector during transmit? KX3 has already last firmware loaded.

Thanks in advance for your explanations. 73's.

Jacques F6AJW / Paris


---
L'absence de virus dans ce courrier électronique a été vérifiée par le

logiciel antivirus Avast.

https://www.avast.com/antivirus

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L'absence de virus dans ce courrier électronique a été vérifiée par le logiciel 
antivirus Avast.
https://www.avast.com/antivirus




---
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antivirus Avast.
https://www.avast.com/antivirus

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Re: [Elecraft] KX3 2m: how to get +TX voltage during transmission?

[Cady, Fred]

Here ya go:

When in the 2M/4M menu, tap  2  to toggle between TX 5V- (the default) and TX 
5V+.  When TX 5V+ is enabled, 5 VDC (± 0.3 v at 0.1 mA) is applied to the 
center pin of ANT 2 when transmitting.  This can be used to switch or control 
external devices such as additional transverters that use 144 or 70 MHz as 
their IF.  

Cheers and 73,
Fred KE7X

Author of:
"The Elecraft K3: Design, Configuration and Operation 2nd ed"
"The Elecraft KX3 - Going for the summit"
"The Elecraft KPA500 and KAT500 - the K-Line Dream Station"
Printed, coil bound copies of these are all available at www.elecraft.com
KPA500 and KAT500 Quick Set Up Guide
http://www.ke7x.com/home/k-line-introduction-and-set-up-guide
KAT500 and KXPA500 Tuner Operation
http://www.ke7x.com/home/kat500-and-kxpa100-tuners

"The Elecraft KXPA100, PX3 and 2M/4M Transverters - Assembling the KX3-Line 
Station" available at www.lulu.com.

"The Elecraft K3S and P3"  (A work in progress)

> -Original Message-
> From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
> Matt Zilmer
> Sent: Friday, July 03, 2015 11:47 AM
> To: Jack F6AJW
> Cc: Elecraft Reflector
> Subject: Re: [Elecraft] KX3 2m: how to get +TX voltage during
> transmission?
> 
> Maybe... Use a bias T with the DC feeding torwards the transverters?
> The ACC2 keyline (p5, Owner's Manual) is pulled low during transmit and
> could be used to activate a FET or bipolar switch to 12VDC.
> 
> 73,
> matt
> W6NIA
> On Fri, 3 Jul 2015 19:37:52 +0200, you wrote:
> 
> >Hello All Elecrafters,
> >
> >I have a KX3 2m; I don't know how to configurate it in order to
> command
> >DB6NT microwave transverters needing +TX voltage present on SMA
> >connector during transmit? KX3 has already last firmware loaded.
> >
> >Thanks in advance for your explanations. 73's.
> >
> >Jacques F6AJW / Paris
> >
> >
> >---
> >L'absence de virus dans ce courrier électronique a été vérifiée par le
> logiciel antivirus Avast.
> >https://www.avast.com/antivirus
> >
> >__
> >Elecraft mailing list
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> >Help: http://mailman.qth.net/mmfaq.htm
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> >
> >This list hosted by: http://www.qsl.net Please help support this email
> >list: http://www.qsl.net/donate.html Message delivered to
> >mzil...@roadrunner.com
> Matt Zilmer, W6NIA
> --
> "Always store beer in a dark place."  -R. Heinlein
> 
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Re: [Elecraft] KX3 2m: how to get +TX voltage during transmission?

[Matt Zilmer]

Maybe... Use a bias T with the DC feeding torwards the transverters?
The ACC2 keyline (p5, Owner's Manual) is pulled low during transmit
and could be used to activate a FET or bipolar switch to 12VDC.

73,
matt
W6NIA
On Fri, 3 Jul 2015 19:37:52 +0200, you wrote:

>Hello All Elecrafters,
>
>I have a KX3 2m; I don't know how to configurate it in order to command 
>DB6NT microwave transverters needing +TX voltage present on SMA 
>connector during transmit? KX3 has already last firmware loaded.
>
>Thanks in advance for your explanations. 73's.
>
>Jacques F6AJW / Paris
>
>
>---
>L'absence de virus dans ce courrier électronique a été vérifiée par le 
>logiciel antivirus Avast.
>https://www.avast.com/antivirus
>
>__
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Matt Zilmer, W6NIA
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[Elecraft] KX3 2m: how to get +TX voltage during transmission?

[Jack F6AJW]

Hello All Elecrafters,

I have a KX3 2m; I don't know how to configurate it in order to command 
DB6NT microwave transverters needing +TX voltage present on SMA 
connector during transmit? KX3 has already last firmware loaded.


Thanks in advance for your explanations. 73's.

Jacques F6AJW / Paris


---
L'absence de virus dans ce courrier électronique a été vérifiée par le logiciel 
antivirus Avast.
https://www.avast.com/antivirus

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Re: [Elecraft] [KX3][2M] Assembly Advice - Going Nuts!

[Steve]

Hot melt glue might be more forgiving (glue on the threads) or double 
sided tape with a punched hole for the screw.
When I built Heath Kits and "real work" I would use tape on my finger so 
that I could hold the nuts in place while I attached the screw...

73, steve WB3LGC

On 21-Dec-14 1:42 PM, Wayne Burdick wrote:

Chris,

This is not supposed to happen (first case I've heard of), so you could just 
request a replacement 2-meter module. That said, you could probably re-glue the 
nut in place temporarily using a tiny bit of epoxy, avoiding the threads. Once 
the TO220 device tab is secured by the screw, the adhesive no longer serves any 
function.

73,
Wayne
N6KR

On Dec 20, 2014, at 11:08 PM, Chris Johnson  wrote:


I am installing my third 2M module on a KX3 for a friend.   On this particular 
unit, the nut that I guess was being held on by some adhesive I never noticed, 
fell off the back of the FET heat sink.   I’m having a stickler of a time 
trying to figure out a clever way to hold the nut on there so I can re-insert 
the board and get the lock screw through the side of the case.  (Figure 20, 
Page 27)

Any wise men around have any sage advice?

/ponder

Chris
K6OZY
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Re: [Elecraft] [KX3][2M] Assembly Advice - Going Nuts!

[Wayne Burdick]

Chris,

This is not supposed to happen (first case I've heard of), so you could just 
request a replacement 2-meter module. That said, you could probably re-glue the 
nut in place temporarily using a tiny bit of epoxy, avoiding the threads. Once 
the TO220 device tab is secured by the screw, the adhesive no longer serves any 
function.

73,
Wayne
N6KR

On Dec 20, 2014, at 11:08 PM, Chris Johnson  wrote:

> I am installing my third 2M module on a KX3 for a friend.   On this 
> particular unit, the nut that I guess was being held on by some adhesive I 
> never noticed, fell off the back of the FET heat sink.   I’m having a 
> stickler of a time trying to figure out a clever way to hold the nut on there 
> so I can re-insert the board and get the lock screw through the side of the 
> case.  (Figure 20, Page 27)
> 
> Any wise men around have any sage advice?
> 
> /ponder
> 
> Chris
> K6OZY
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[Elecraft] [KX3][2M] Assembly Advice - Going Nuts!

[Chris Johnson]

I am installing my third 2M module on a KX3 for a friend.   On this particular 
unit, the nut that I guess was being held on by some adhesive I never noticed, 
fell off the back of the FET heat sink.   I’m having a stickler of a time 
trying to figure out a clever way to hold the nut on there so I can re-insert 
the board and get the lock screw through the side of the case.  (Figure 20, 
Page 27)

Any wise men around have any sage advice?

/ponder

Chris
K6OZY
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[Elecraft] KX3-2M low power output in SSB mode -- fixed

[Wayne Burdick]

I believe I have this fixed. Drive power was internally limited and scaled in a 
way that affected only SSB mode, especially with speech compression turned on. 
If you've noticed lower power output on the 2-meter module in SSB mode than in 
CW or FM modes, and would like to try the revised firmware, please email me 
directly.

I have several other KX3 firmware changes to make, e.g. improving high-speed CW 
keying on 2 meters. These will have to wait until after the Thanksgiving 
holiday.

73,
Wayne
N6KR

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Re: [Elecraft] KX3-2m CW problem

[Jack F6AJW]

Good evening /bonsoir Paul, Olli, Wayne and All,

Thank you for your comments. Here, output power is the same using 
internal batteries or external 13.8V in FM or SSB; here, I can perform 
precise power measurements up to 24 GHz. Thanks in anticipation, Wayne, 
for power improvement to come May be that a future software release 
will manage to also improve rejection of birdies too. For the moment, I 
have just tried with an external antenna 3 elements Yagi antenna located 
a few meters from KX3 and it was the same situation regarding internal 
birdies. Interesting to know what is the behaviour of 4m module compared 
to the 2m one?


73's.

Jacques F6AJW/ Paris

Le 22/11/2014 17:17, paul hippenmeyer a écrit :

Bonjour Jacques,

Merci pour votre reponse!

TX output 2W:
Do you apply enought supply voltage? Min 2.5W are specified with 
13.8VDC supply.


Birdies:
Yes, it has quite a few. But for my use this is much less tragic than 
the CW trouble. Hope you will find a solution for your usage.


Merci es 73, paul
hb9axl




Sorry Paul, no answer to your problem with CW (not yet tried).
On my side, I am a bit disappointed with my KX3-2m because of low TX
output (2W instead of 3 announced) and lot of birdies on dummy load in
RX mode. When using an external antenna, noise level increases and some
birdies disappear but not all especially on 144.400 MHz. Do not try to
connect an antenna (flexible quarter wave in my case) directly on SMA
socket, you will receive a lot of birdies so, no way to use my KX3-2m
like I used to do at the end of 70's with my IC-202 transceiver and
telescopic antenna.

Any way to cure my problems?

73's.

Jacques F6AJW/Paris


  Le 21/11/2014 18:05, paul hippenmeyer a ?crit :


Hi all,

CW on 2m is a problem. Especially with speeds higher than 25 wpm the
timing of the sidetone becomes very unregular (eg. continues keying of
dots only). With an external keyer the problem seems to be even worse.
QRQ CW sounds very dirty.

CW on HF bands is perfect.

Any others who can confirm this problem?

73, paul
hb9axl

MCU 2.25
DSP  1.30


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Re: [Elecraft] KX3-2m CW problem

[paul hippenmeyer]

Keying on the other transverter bands is fine, it's just the KX3-2m module.

Thanks to all,
73, paul
hb9axl


Am 22.11.2014 21:38, schrieb Wayne Burdick:

On the list, along with an improvement in SSB power output.

Thanks,
Wayne
N6KR


On Nov 22, 2014, at 12:29 PM, Matt VK2RQ  wrote:


Very interesting -- I hooked the KX3 up to a scope, set it at 30wpm on 2m with 
VOX OFF, and sent a continual stream of dits. This is what I saw:
http://www.vk2rq.ampr.org//images/IMG_0271.jpg

The dits are in fact quite uneven (some nearly twice as long as others), and if 
you listen to a continuous stream of dits it is indeed obvious to the ear. Also 
as you say, this problem does not occur on the other bands.

It seems there may be some sort of timing issue in the firmware; I guess this will get 
added somewhere on the "to-do" list.

73, Matt VK2RQ.


On 22 Nov 2014, at 10:17 pm, paul hippenmeyer  wrote:

Hi Matt,

Thanks for your response! Good idea, but it is not a RF feedback. It happens 
also with VOX=off (RF output power=0). With a audio record (e.g. Audacitiy or 
scope) of the sidetone you can see, that dot length is very unregular (set 
speed to 40 wpm). If you do the same on a HF band, each dot has the same lenght 
- perfect.

On 2m CW is useful with low speeds only. On higher CW speeds the sidetone is 
very irritating for keying.

tnx es 73, paul hb9axl




Just tried 2m CW using a begali paddle plugged in to the KX3 internal keyer, 
the CW sounds fine to me (up to 30wpm at least, unfortunately that's about as 
fast as I can go). I'm wondering if you might be having some sort of RF 
feedback issue? What sort of antenna setup do you have?

73, Matt VK2RQ

On 22 Nov 2014, at 4:05 am, paul hippenmeyer  wrote:

Hi all,

CW on 2m is a problem. Especially with speeds higher than 25 wpm the timing of 
the sidetone becomes very unregular (eg. continues keying of dots only). With 
an external keyer the problem seems to be even worse. QRQ CW sounds very dirty.

CW on HF bands is perfect.

Any others who can confirm this problem?

73, paul
hb9axl

MCU 2.25
DSP  1.30



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Re: [Elecraft] KX3-2m CW problem

[Wayne Burdick]

On the list, along with an improvement in SSB power output.

Thanks,
Wayne
N6KR


On Nov 22, 2014, at 12:29 PM, Matt VK2RQ  wrote:

> Very interesting -- I hooked the KX3 up to a scope, set it at 30wpm on 2m 
> with VOX OFF, and sent a continual stream of dits. This is what I saw:
> http://www.vk2rq.ampr.org//images/IMG_0271.jpg
> 
> The dits are in fact quite uneven (some nearly twice as long as others), and 
> if you listen to a continuous stream of dits it is indeed obvious to the ear. 
> Also as you say, this problem does not occur on the other bands.
> 
> It seems there may be some sort of timing issue in the firmware; I guess this 
> will get added somewhere on the "to-do" list.
> 
> 73, Matt VK2RQ.
> 
>> On 22 Nov 2014, at 10:17 pm, paul hippenmeyer  
>> wrote:
>> 
>> Hi Matt,
>> 
>> Thanks for your response! Good idea, but it is not a RF feedback. It happens 
>> also with VOX=off (RF output power=0). With a audio record (e.g. Audacitiy 
>> or scope) of the sidetone you can see, that dot length is very unregular 
>> (set speed to 40 wpm). If you do the same on a HF band, each dot has the 
>> same lenght - perfect.
>> 
>> On 2m CW is useful with low speeds only. On higher CW speeds the sidetone is 
>> very irritating for keying.
>> 
>> tnx es 73, paul hb9axl
>> 
>> 
>> 
>> 
>> Just tried 2m CW using a begali paddle plugged in to the KX3 internal keyer, 
>> the CW sounds fine to me (up to 30wpm at least, unfortunately that's about 
>> as fast as I can go). I'm wondering if you might be having some sort of RF 
>> feedback issue? What sort of antenna setup do you have?
>> 
>> 73, Matt VK2RQ
>> 
>> On 22 Nov 2014, at 4:05 am, paul hippenmeyer  
>> wrote:
>> 
>> Hi all,
>> 
>> CW on 2m is a problem. Especially with speeds higher than 25 wpm the timing 
>> of the sidetone becomes very unregular (eg. continues keying of dots only). 
>> With an external keyer the problem seems to be even worse. QRQ CW sounds 
>> very dirty.
>> 
>> CW on HF bands is perfect.
>> 
>> Any others who can confirm this problem?
>> 
>> 73, paul
>> hb9axl
>> 
>> MCU 2.25
>> DSP  1.30
>> 
>> 
> 
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Re: [Elecraft] KX3-2m CW problem

[Matt VK2RQ]

Very interesting -- I hooked the KX3 up to a scope, set it at 30wpm on 2m with 
VOX OFF, and sent a continual stream of dits. This is what I saw:
http://www.vk2rq.ampr.org//images/IMG_0271.jpg

The dits are in fact quite uneven (some nearly twice as long as others), and if 
you listen to a continuous stream of dits it is indeed obvious to the ear. Also 
as you say, this problem does not occur on the other bands.

It seems there may be some sort of timing issue in the firmware; I guess this 
will get added somewhere on the "to-do" list.

73, Matt VK2RQ.

> On 22 Nov 2014, at 10:17 pm, paul hippenmeyer  
> wrote:
> 
> Hi Matt,
> 
> Thanks for your response! Good idea, but it is not a RF feedback. It happens 
> also with VOX=off (RF output power=0). With a audio record (e.g. Audacitiy or 
> scope) of the sidetone you can see, that dot length is very unregular (set 
> speed to 40 wpm). If you do the same on a HF band, each dot has the same 
> lenght - perfect.
> 
> On 2m CW is useful with low speeds only. On higher CW speeds the sidetone is 
> very irritating for keying.
> 
> tnx es 73, paul hb9axl
> 
> 
> 
> 
> Just tried 2m CW using a begali paddle plugged in to the KX3 internal keyer, 
> the CW sounds fine to me (up to 30wpm at least, unfortunately that's about as 
> fast as I can go). I'm wondering if you might be having some sort of RF 
> feedback issue? What sort of antenna setup do you have?
> 
> 73, Matt VK2RQ
> 
> On 22 Nov 2014, at 4:05 am, paul hippenmeyer  wrote:
> 
> Hi all,
> 
> CW on 2m is a problem. Especially with speeds higher than 25 wpm the timing 
> of the sidetone becomes very unregular (eg. continues keying of dots only). 
> With an external keyer the problem seems to be even worse. QRQ CW sounds very 
> dirty.
> 
> CW on HF bands is perfect.
> 
> Any others who can confirm this problem?
> 
> 73, paul
> hb9axl
> 
> MCU 2.25
> DSP  1.30
> 
> 

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Re: [Elecraft] KX3-2m CW problem

[paul hippenmeyer]

Bonjour Jacques,

Merci pour votre reponse!

TX output 2W:
Do you apply enought supply voltage? Min 2.5W are specified with 13.8VDC supply.

Birdies:
Yes, it has quite a few. But for my use this is much less tragic than the CW 
trouble. Hope you will find a solution for your usage.

Merci es 73, paul
hb9axl




Sorry Paul, no answer to your problem with CW (not yet tried).
On my side, I am a bit disappointed with my KX3-2m because of low TX
output (2W instead of 3 announced) and lot of birdies on dummy load in
RX mode. When using an external antenna, noise level increases and some
birdies disappear but not all especially on 144.400 MHz. Do not try to
connect an antenna (flexible quarter wave in my case) directly on SMA
socket, you will receive a lot of birdies so, no way to use my KX3-2m
like I used to do at the end of 70's with my IC-202 transceiver and
telescopic antenna.

Any way to cure my problems?

73's.

Jacques F6AJW/Paris


  Le 21/11/2014 18:05, paul hippenmeyer a ?crit :


Hi all,

CW on 2m is a problem. Especially with speeds higher than 25 wpm the
timing of the sidetone becomes very unregular (eg. continues keying of
dots only). With an external keyer the problem seems to be even worse.
QRQ CW sounds very dirty.

CW on HF bands is perfect.

Any others who can confirm this problem?

73, paul
hb9axl

MCU 2.25
DSP  1.30

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[Elecraft] KX3-2M power out problem & birdies (was: Re: KX3-2m CW problem)

[Oliver Dröse]

Hi Jack,

Elecraft is aware of the power out problem, we reported it already a few 
weeks ago. My personal KX3-2M is only putting out 2 watts on SSB, too 
(like yours), while the one of a friend of mine even only 1.5 watts (all 
measured on a calibrated PEP meter). Both units put out the full 3 watts 
on CW & FM. The low SSB power out is reflected on the KX3's internal 
meter, too. It seems there are units that have the problem and some that 
don't.


Wayne's supposed to work on the problem and it should be fixable by 
firmware, that's the last response I had from him 2 weeks ago (after we 
had done a few other checks the weeks before). Eagerly waiting for new 
beta software to try the fix overhere ...


Concerning the birdies: Yes, there are a few. With a real antenna 
connected there are only 3 or 4 left that are audible stronger than s1 
in the 144.0 to 144.5 MHz range, non of them stronger than s3. Yes, it 
would be great to have no birdies at all in the weak signal band but to 
be honest I do not know of any transceiver of the last 20 years (and 
I've tried a few) that has no birdies at all. We certainly have to 
accept a few compromises when putting so much technique into such a 
small package.


Haven't tried connecting just a whip directly to the KX3 yet, always had 
a yagi connected as with the small power out you need every bit of 
antenna gain you can get anyway to make QSOs. ;-) Have you tried using a 
smal HB9CV or 2L yagi a few meters away? Still too many birdies then?


73, Olli - DH8BQA

Contest, DX & radio projects: http://www.dh8bqa.de


Am 21.11.2014 22:38, schrieb Jack F6AJW:

Sorry Paul, no answer to your problem with CW (not yet tried).
On my side, I am a bit disappointed with my KX3-2m because of low TX 
output (2W instead of 3 announced) and lot of birdies on dummy load in 
RX mode. When using an external antenna, noise level increases and 
some birdies disappear but not all especially on 144.400 MHz. Do not 
try to connect an antenna (flexible quarter wave in my case) directly 
on SMA socket, you will receive a lot of birdies so, no way to use my 
KX3-2m like I used to do at the end of 70's with my IC-202 transceiver 
and telescopic antenna.


Any way to cure my problems?

73's.

Jacques F6AJW/Paris


 Le 21/11/2014 18:05, paul hippenmeyer a écrit :

Hi all,

CW on 2m is a problem. Especially with speeds higher than 25 wpm the 
timing of the sidetone becomes very unregular (eg. continues keying 
of dots only). With an external keyer the problem seems to be even 
worse. QRQ CW sounds very dirty.


CW on HF bands is perfect.

Any others who can confirm this problem?

73, paul
hb9axl

MCU 2.25
DSP  1.30


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Re: [Elecraft] KX3-2m CW problem

[paul hippenmeyer]

Hi Matt,

Thanks for your response! Good idea, but it is not a RF feedback. It 
happens also with VOX=off (RF output power=0). With a audio record (e.g. 
Audacitiy or scope) of the sidetone you can see, that dot length is very 
unregular (set speed to 40 wpm). If you do the same on a HF band, each 
dot has the same lenght - perfect.


On 2m CW is useful with low speeds only. On higher CW speeds the 
sidetone is very irritating for keying.


tnx es 73, paul
hb9axl



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Re: [Elecraft] KX3-2m CW problem

[Matt VK2RQ]

Just tried 2m CW using a begali paddle plugged in to the KX3 internal keyer, 
the CW sounds fine to me (up to 30wpm at least, unfortunately that's about as 
fast as I can go). I'm wondering if you might be having some sort of RF 
feedback issue? What sort of antenna setup do you have?

73, Matt VK2RQ

> On 22 Nov 2014, at 4:05 am, paul hippenmeyer  wrote:
> 
> Hi all,
> 
> CW on 2m is a problem. Especially with speeds higher than 25 wpm the timing 
> of the sidetone becomes very unregular (eg. continues keying of dots only). 
> With an external keyer the problem seems to be even worse. QRQ CW sounds very 
> dirty.
> 
> CW on HF bands is perfect.
> 
> Any others who can confirm this problem?
> 
> 73, paul
> hb9axl
> 
> MCU 2.25
> DSP  1.30
> 
> 
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Re: [Elecraft] KX3-2m CW problem

[Jack F6AJW]

Sorry Paul, no answer to your problem with CW (not yet tried).
On my side, I am a bit disappointed with my KX3-2m because of low TX 
output (2W instead of 3 announced) and lot of birdies on dummy load in 
RX mode. When using an external antenna, noise level increases and some 
birdies disappear but not all especially on 144.400 MHz. Do not try to 
connect an antenna (flexible quarter wave in my case) directly on SMA 
socket, you will receive a lot of birdies so, no way to use my KX3-2m 
like I used to do at the end of 70's with my IC-202 transceiver and 
telescopic antenna.


Any way to cure my problems?

73's.

Jacques F6AJW/Paris


 Le 21/11/2014 18:05, paul hippenmeyer a écrit :

Hi all,

CW on 2m is a problem. Especially with speeds higher than 25 wpm the 
timing of the sidetone becomes very unregular (eg. continues keying of 
dots only). With an external keyer the problem seems to be even worse. 
QRQ CW sounds very dirty.


CW on HF bands is perfect.

Any others who can confirm this problem?

73, paul
hb9axl

MCU 2.25
DSP  1.30


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[Elecraft] KX3-2m CW problem

[paul hippenmeyer]

Hi all,

CW on 2m is a problem. Especially with speeds higher than 25 wpm the 
timing of the sidetone becomes very unregular (eg. continues keying of 
dots only). With an external keyer the problem seems to be even worse. 
QRQ CW sounds very dirty.


CW on HF bands is perfect.

Any others who can confirm this problem?

73, paul
hb9axl

MCU 2.25
DSP  1.30


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[Elecraft] KX3 2M,, KX3

[riese-k3djc]

Just a quick report on the 2 meter option at my QTH
my antennas are 150 Ft away from many hospital pagers 
at 150 Mhz which cause issues on all the FM gear I have
so I expected the worse
but
using a simple stub I am able to eliminate any  interference from the
pagers
the stub is tunable and will notch any problems
the receiver sounds and works as well as my DEM station and takes up a
lot less space
really amazing 
the only issue was not seeing any output on the KX3 RF bridge,,, 
an nice enhancement would be to make the RF/SWR metering 
a bit more sensitive on 144
many thanks to Howard K6IA elecraft support for helping my bone headiness
I have a DEM 144 transceiver and a kenwood TS 850 up for sale
 
Bob K3DJC

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Re: [Elecraft] [KX3][2M] Over heat question

[Wayne Burdick]

> Is there a reason why you chose 50mhz instead of 28mhz for the IF?   

Yes. We use the LO*4 signal from the synthesizer to drive the 2-meter module's 
down-conversion mixer, and the math for this puts the I.F. at 48 MHz when R.F. 
is 144 MHz. If not for this fortunate result, adding 2 meters to the KX3 would 
require a separate, high-stability TCXO running at around 190 MHz. A lot more 
expensive.

Wayne


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Re: [Elecraft] [KX3][2M] Over heat question

[Chris Johnson]

OK Good to know.   I could not get all the way through a single radiogram on 
Olivia 1000/32 with an average transmit time of 2.5 minutes without it shutting 
down a hair after 2 minutes in.   I just installed all the SideKick panels and 
Fred's heatsink on my newest KX3 and will retry tonight.

Is there a reason why you chose 50mhz instead of 28mhz for the IF?   The KX3 is 
very inefficient on 6M it seems.

On Sep 16, 2014, at 7:50 AM, Wayne Burdick  wrote:

> On 2 meters, heating is divided between the HF power amplifier and the 
> 2-meter power amplifier. I.F. drive for the 2-meter module is generated by 
> the HF PA, which must still be biased class AB to ensure low distortion. 
> While the HF PA is not putting out much power, it is reasonably heavily 
> biased and will eventually heat up. This should take quite awhile, but it is 
> not rated for key-down "forever," even in this instance.
> 
> 73,
> Wayne
> N6KR
> 
> On Sep 16, 2014, at 12:15 AM, Chris Johnson  wrote:
> 
>> I participated in a local ARES net with my KX3/2M combo and a mirage B-310-G 
>> and B-34-G amps.  We were using Olivia 1000/32 using 2M verticals to pass 
>> traffic around the valley and Tucson testing various power levels.
>> 
>> Long story short,  these mirage amps work well but the 310 consumes 9 amps 
>> even when driven with .3 watts in / 30w out from the KX3-2M, and the B-34 
>> uses a more field-use reasonable 3.9 amps when driven with 3 Watts In/ 20 
>> watts out from the KX3.  The net current usage is more optimal with the KX3 
>> + B34G, but using this combination the KX3 over heats and shuts off.   
>> Here's where my confusion comes in.
>> 
>> The back of the KX3 where the primary FETs are were hot.   I was under the 
>> impression that the KX3 used a 50Mhz IF to drive the 2M module and the 2M 
>> FET on the side would be where the heat is generated, ultimately being the 
>> part that would overheat if driven too long.   But it seemed that the rear 
>> FETs were where the max heat was generated, ultimately resulting in a self 
>> protection shutdown.   Can I get some clarification on why this happened and 
>> what the drive level of the IF is?
>> 
>> I have a heat sink to install but have not done it yet.  I have two KX3's, 
>> and will likely make one my digital high-duty cycle KX3 if this is 
>> unavoidable at even 3W.  I have a 2M module in both KX3s.
>> 
>> https://www.flickr.com/photos/ozy311/15255424125/sizes/h/
>> 
>> Thank you ahead of time!
>> 
>> Chris
>> K6OZY
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Re: [Elecraft] KX3 2M Module

[Edward R Cole]

Kevin,

On some of the early 2M models the printing on the metal shield was 
backwards to that shown in the manual.  I made the mistake of 
installing my shield per the photo in the manual and got the shield 
on backwards which partially shorted the output transistor resulting 
in low RF output (0.3w vs 3.0w).  I was one of the field testers so 
my unit was very early production.  MY understanding is that the 
label issue was remedied in later units.


To be absolutely sure the shield is on correctly you should visually 
examine the shield to see if the tiny cutout is over the output 
transistor (this is the one with a tab you secured with a black 
flat-head screw).  You should be able to check it without  removal of 
the shield.  Another way to describe it is the cutout is along the 
side of the shield nearest the edge of the radio case.


The manual was updated on this if I am not mistaken (Ron?).

"NOT receiving" is something to call tech support on.  If it 
transmits OK, this would indicate to me a problem in the 2M unit.


My receiver lost sensitivity in field testing and was 
repaired.  Elecraft added a mod to provide more protection to the 
receiver input ckts (which I believe is a permanent mod on later 
production units).  I run 1400w on 2m for eme on a tower only 
130-feet away from the antennas I use with my KX3, so this puts my 
KX3-2M in an extreme RF environment.  I unplug the KX3 antenna when 
running eme, now.


73, Ed - KL7UW

snip -
Incidentally, the label on the shield was affixed 180 degrees to the
illustration in the instruction manual.  I caught that before powering
the rig.

73
Kevin
VK3DAP / ZL2DAP


73, Ed - KL7UW
http://www.kl7uw.com
"Kits made by KL7UW"
Dubus Mag business:
dubus...@gmail.com

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