[Elecraft] P3 For Sale

[Joe Word]

For Sale Elecraft P3-F factory built panadapter in as new condition with
optional P3SVGA adapter for computer monitor use. No scratches and has not
been around tobacco smoke. Serial number 36xx. No longer have a K3, so
selling the P3. Comes with original box, manual and cable set: RF cable,
data cable and 2 power cables (from P3 or from power supply). $720 plus
help on shipping, $12 is about half, shipped in CONUS. Payment by money
order, Cashier's check or cash. I do not have a Papal account. Contact me
at: n9vx.joe at gmail,com
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[Elecraft] P3 For Sale

[Joe Word]

Email corrected...
For Sale Elecraft P3-F factory built panadapter in as new condition with
optional P3SVGA adapter for computer monitor use. No scratches and has not
been around tobacco smoke. Serial number 36xx. No longer have a K3, so
selling the P3. Comes with original box, manual and cable set: RF cable,
data cable and 2 power cables (from P3 or from power supply). $720 plus
help on shipping, $12 is about half, shipped in CONUS. Payment by money
order, Cashier's check or cash. I do not have a Papal account. Contact me:
n9vx.joe at gmail.com
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[Elecraft] Q11 Blown

[Dickie M0AUW]

Hi Don et all, 

My own stupid fault, I was tuning up my other transceiver and forgot the K2
(fitted withK2/100) was still on and something went bang! On checking the K2
there was no transmit, receive was ok. I traced the fault back and found
that *Q11 had blown*.

 I cannot visibly see any other fault but could you advise on other checks I
may need to do or would this be the only likely fault from that sort of
mistake. Do I replace Q13 as well as a precaution?

Thanks in advance.
Richard M0AUW



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[Elecraft] K3s missing right channel in "nor xxx" mode / digital level too low - BUG?

[C G]

Hi Al,

Thanks for your answer. Can't explain the logic behind this behavior. Would it 
be a bug in firmware?...
Maybe this could be on the wish list then. For both requests ("nor" stereo AFX 
*and* low digital level).
Santa's gone, but who knows?

Best 73,
Christian F1GWR

Le 30 déc. 2016 à 02:07, Al Lorona a écrit :

> Bon jour, Christian,
> 
> Yes, your K3s is working correctly! On Line Out, only one channel. On Phones, 
> both channels, including AFX.
> 
> I have also wanted AFX in normal mode from Line Out, but it does not work 
> that way. Too bad!
> 
> Take care,
> 
> Al  W6LX
> 
> 
> 
> 
> 
> 
> - Original Message -
> From: C G 
> To: Elecraft@mailman.qth.net
> Sent: Thursday, December 29, 2016 5:00 PM
> Subject: [Elecraft] K3s missing right channel in "nor xxx" mode / digital 
> level too low
> 
> My K3s/10 has no sub-receiver option. I use two speakers plugged in the rear 
> jack that work perfectly. Firmware is up-to-date.
> 
> Now two issues:
> 
> In USB Audio (digital) or Line Out (analog), when setting the Config:Lin Out:
> - in "=phones" I receive (pseudo-) stereo in my computer, but
> - in "nor xxx" only the left channel remains. Is this on purpose or did I 
> miss a setting somewhere ?
> I'd like to obtain pseudo-stereo AFX also in "nor xxx" mode (i.e. AF setting 
> has no influence)
> 
> Beside this, the digital level is too weak (-30 dB peak with AGC=on) in USB 
> audio. Would it be possible to rise the output level to AES/EBU Broadcast 
> Audio Standard, i.e. -18 or -20 dB (depending on countries), or even more, as 
> dynamic is lower for speech and therefore headroom can be reduced without 
> clipping consequences. That would mean additional A/D gain : +10 dB, + 12 dB, 
> and maybe +24 or +30 dB boost for weak signals?
> 
> 
> 73,
> Christian F1GWR
> K3s 1087x
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[Elecraft] Help with defective KFL3A-400 needed

[Marcus Busch [DL1EKC]]

Hello everybody,

I have a friend's KFL3A-400 on my bench which shows a 20 dB passband 
attenuation with 
high ripple. The fault was originally detected by a 3 S units signal drop in 
the K3 
compared to its other crystal filters. The filter was working perfectly until 
recently.

I disassembled and measured all crystals and they seem to be OK, with the 
exception 
of crystal no. 6 showing a higher ESR. But is this an issue?

The input and output transfomers seem to be OK as well, although checked only 
for DC 
conductance and isolation. All solder joints have been checked.

These are my measurement results:

passband: http://www.dl1ekc.de/LinkedContent/DL3QQ_KFL3A-400.png
crystals: http://www.dl1ekc.de/LinkedContent/DL3QQ_KFL3A-400_Quarze.pdf

Any filter expert around here who can point me into the right direction? Any 
help is 
greatly appreciated.

VY 73

Marcus

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Re: [Elecraft] Q11 Blown

[Don Wilhelm]

Richard,

Well, the loud pop was most likely one PA transistor exploding, so I 
expect you will have to replace Q7 and Q8 as well.  If you remove the 
heatsink, you will likely see one of the PA transistors damaged.

Yes, replace Q11 and Q13 together.
Get the K2PAKIT from Elecraft - that kit has matched PA transistors plus 
replacements for Q11 and Q13.

Just for good measure, order 2 1N5711 diodes - Elecraft p/n E560004.

Procedure: Remove Q7 and Q8, Q11 and Q13.
Install Q11 and Q13 first, then check the voltage at the base solder 
pads for Q7 and Q8.  It must be zero during receive.  Then do a TUNE and 
measure the PA transistor base solder pad voltage.  If it is not in the 
range of 0.60 to 0.64 volts, investigate the resistors in the Q11/Q13 
circuit.

Only after those checks should you install Q7 and Q8.

That should get the base K2 working.

Now it is time to try the KPA100 on it.  Get an external wattmeter and a 
dummy load for the test.  You are checking to see if you have good power 
control in the K2.  You can lay the KPA100 on its back on a box or book 
about half the height of the K2 for the test.  Connect the external 
wattmeter and dummy load, set the power knob at 50 watts and do a TUNE. 
What is the actual power?
If it is about 20 watts, all is fine, but if it is 100 watts or higher, 
you have a problem with the KPA100 wattmeter.

The most likely wattmeter problem is that D16 and D17 are damaged.

So what may have happened?  The KPA100 wattmeter diodes can be damaged 
by static from the antenna feedline.  When that happens, the K2 will 
still produce power, but the power output will be as much as the K2/100 
can deliver, often 180 watts.
If that situation goes unnoticed, the PA transistors in the base K2 are 
stressed and will eventually fail.  If they fail with collector to base 
leakage, Q11 and Q13 will also be damaged.

That is why I tell you to proceed in the steps I have outlined.

73,
Don W3FPR



73,
Don W3FPR

On 12/30/2016 5:38 AM, Dickie M0AUW wrote:

Hi Don et all,

My own stupid fault, I was tuning up my other transceiver and forgot the K2
(fitted withK2/100) was still on and something went bang! On checking the K2
there was no transmit, receive was ok. I traced the fault back and found
that *Q11 had blown*.

 I cannot visibly see any other fault but could you advise on other checks I
may need to do or would this be the only likely fault from that sort of
mistake. Do I replace Q13 as well as a precaution?


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Re: [Elecraft] Q11 Blown

[Dickie M0AUW]

Excellent Don,

Many thanks for your quick response, I'll start as soon as I can.
Happy new year and 73s

Richard M0AUW



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[Elecraft] EFHW (was Small QRP antenna)

[Michael Babineau]

Anyone interested in EFHW antennas should read Steve, AA5TB’s excellent website.

http://www.aa5tb.com/efha.html

Some of the currently available EFHW tuners (QRPGuys& QRPkits SOTA )
use the tapped inductor approach, but I much prefer Steve’s idea of using a 
transformer.
 The advantage is that it helps to isolates the feedline.
I have found that this approach gives more predictable results when deploying 
the antenna
in different situations and with different coax lengths as compared to the 
tapped inductor 
approach where the coax shield becomes the “counterpoise”.  

I actually purchased a QRPkits SOTA Tuner kit, swapped out the toroid core for 
the one
Steve recommends (T-50-2) and wound a transformer as Steve suggests in figure 12
and it works great with the suggested elevated 0.05 wavelength counterpoise. 

Cheers

Michael VE3WMB 

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Re: [Elecraft] Q11 Blown

[Don Wilhelm]

Richard,

If you do not have good de-soldering tools, be careful when removing 
components.  There is no sense in removing the component intact.  The 
board is more valuable than any component.
Cut off the leads close to the component body (or crush the component 
with pliers if necessary so you can remove the leads one at a time. 
Clean up the excess solder with solder wick and if solder still remains 
in the holes, heat the solder pad and push the solder out with a wooden 
toothpick.


Happy New Year to everyone.

73,
Don W3FPR

On 12/30/2016 8:49 AM, Dickie M0AUW wrote:

Excellent Don,

Many thanks for your quick response, I'll start as soon as I can.
Happy new year and 73s

Richard M0AUW



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Re: [Elecraft] Help with defective KFL3A-400 needed

[Don Wilhelm]

Marcus,

You might want to query the folks at Inrad - they build the 8 pole filters.

You would need to replace all the crystals with a matched set, so it may 
be better to buy a new filter.


73,
Don W3FPR

On 12/30/2016 8:18 AM, Marcus Busch [DL1EKC] wrote:

Hello everybody,

I have a friend's KFL3A-400 on my bench which shows a 20 dB passband 
attenuation with
high ripple. The fault was originally detected by a 3 S units signal drop in 
the K3
compared to its other crystal filters. The filter was working perfectly until
recently.

I disassembled and measured all crystals and they seem to be OK, with the 
exception
of crystal no. 6 showing a higher ESR. But is this an issue?

The input and output transfomers seem to be OK as well, although checked only 
for DC
conductance and isolation. All solder joints have been checked.


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[Elecraft] KXPA100 with PX3

[Ray W2RS via Elecraft]

I've been using the PX3 with my KX3 for a year now, with no problems.  I've now 
added a KXPA100, and find that either I can have full functionality of the 
amplifier, or of the panadaptor, but not both at the same time.


I've set up the system for full functionality of the PX3 and "Basic" operation 
of the KXPA100, using the ACC2 port on the KX3.  That works OK, but I'd like to 
have full use of the KXPA100's interaction with the KX3, without losing full 
use of the PX3.  The issue seems to be that they cannot share use of ACC1.  


Anybody have a solution?


73 Ray W2RS
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Re: [Elecraft] KXPA100 with PX3

[Dick Dievendorff]

Ray:  Hope this helps:

http://www.elecraft.com/manual/PX3_installation_FAQ_v-0-8.pdf 

see Figure 3.

73 de Dick, K6KR


-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ray
W2RS via Elecraft
Sent: Friday, December 30, 2016 06:38
To: elecraft@mailman.qth.net
Subject: [Elecraft] KXPA100 with PX3

I've been using the PX3 with my KX3 for a year now, with no problems.  I've
now added a KXPA100, and find that either I can have full functionality of
the amplifier, or of the panadaptor, but not both at the same time.


I've set up the system for full functionality of the PX3 and "Basic"
operation of the KXPA100, using the ACC2 port on the KX3.  That works OK,
but I'd like to have full use of the KXPA100's interaction with the KX3,
without losing full use of the PX3.  The issue seems to be that they cannot
share use of ACC1.  


Anybody have a solution?


73 Ray W2RS
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Re: [Elecraft] KXPA100 with PX3

[Ray W2RS via Elecraft]

Hi Dick,


When I tried that, I got no output from the KXPA100 with the KX3 PA MODE set to 
ON.  If I set that to OFF, I get full output but then not full interaction with 
the KX3.  What am I doing wrong?


73 Ray W2RS 



-Original Message-
From: Dick Dievendorff 
To: rsoifer1 
Cc: elecraft 
Sent: Fri, Dec 30, 2016 8:02 am
Subject: RE: [Elecraft] KXPA100 with PX3

Ray:  Hope this helps:

http://www.elecraft.com/manual/PX3_installation_FAQ_v-0-8.pdf 

see Figure 3.

73 de Dick, K6KR


-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ray
W2RS via Elecraft
Sent: Friday, December 30, 2016 06:38
To: elecraft@mailman.qth.net
Subject: [Elecraft] KXPA100 with PX3

I've been using the PX3 with my KX3 for a year now, with no problems.  I've
now added a KXPA100, and find that either I can have full functionality of
the amplifier, or of the panadaptor, but not both at the same time.


I've set up the system for full functionality of the PX3 and "Basic"
operation of the KXPA100, using the ACC2 port on the KX3.  That works OK,
but I'd like to have full use of the KXPA100's interaction with the KX3,
without losing full use of the PX3.  The issue seems to be that they cannot
share use of ACC1.  


Anybody have a solution?


73 Ray W2RS
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[Elecraft] Velocity factor

[Dauer, Edward]

I wonder if the difference in opinions has to do not with right or wrong as a 
matter of physics but rather with the customary use of terminology.  As I have 
understood it, the phrase “velocity factor” is ordinarily used in connection 
with transmission lines; AND it is the case that the velocity of a wave in any 
medium other than free space can differ – that is to say, it’s slower.  Whether 
the technical term “velocity factor” covers it all I can’t say.  Maybe in 
ordinary usage the generic term is “velocity of propagation” which in wires can 
vary from 0.7 to 0.99 C

Ted, KN1CBR

--

Message: 12
Date: Thu, 29 Dec 2016 18:44:57 -0500
From: Don Wilhelm 
To: Walter Underwood ,   Elecraft Reflector
Reflector 
Subject: Re: [Elecraft] Small QRP antenna
Message-ID: <888b56e6-e2d3-5452-83aa-6bd9df16b...@embarqmail.com>
Content-Type: text/plain; charset=utf-8; format=flowed

Walt,

I differ, antenna wires do have a velocity factor to consider.  I built 
a 6 meter Moxon beam for my grandson out of insulated wire, and the 
resonant frequency was considerably low.  Stripping the insulation from 
the wire brought its resonance point up to what was expected.
The only reason was because the velocity factor for the insulated wire 
was less than that of non-insulated wire.

73,
Don W3FPR

 

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Re: [Elecraft] [KX3] Mini Banana Plug Question

[Bill Johnson]

The mini plug by my measurement is 2.4 mm at the shaft not slotted and ~ 2.5
mm near the tip, the slotted section at its widest.

73,
Bill
K9YEQ

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bob
Nielsen
Sent: Friday, December 30, 2016 1:40 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] [KX3] Mini Banana Plug Question

I found a spec sheet for Pomona mini banana plugs and they are 3.05 mm
(probably 3 mm compressed).

Bob, N7XY


On 12/29/16 12:38 PM, rwl...@gmail.com [KX3] wrote:
>
> Will a 2 mm mini banana plug work as a ground connection in my KX2? Of 
> not, what size should I be looking for?
>
> Bob W9UCR
>

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Re: [Elecraft] KXPA100 with PX3

[Ryan Noguchi via Elecraft]

>>http://www.elecraft.com/manual/PX3_installation_FAQ_v-0-8.pdf  see Figure 3.
>When I tried that, I got no output from the KXPA100 with the KX3 PA MODE set 
>to ON.  If I set that to OFF, I get full output but then not full interaction 
>with the KX3.  What am I doing wrong?

So are you saying that you have the KX3, PX3, and KXPA100 all connected in the 
exact manner depicted in Figure 3 (which also appears in the PX3 manual) and 
you're still experiencing this problem? Maybe I'm mistaken, but it sounds like 
you aren't using the KX3-KXPA100 adapter cable. You can't just connect the 
KXPA100 RS232 port directly to the KX3 ACC1 port.

73, Ryan AI6DO
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Re: [Elecraft] KXPA100 with PX3

[Ray W2RS via Elecraft]

Hi Ryan,


Yes, I am using the control cable.  


73 Ray



-Original Message-
From: Ryan Noguchi 
To: rsoifer1 ; elecraft 
Sent: Fri, Dec 30, 2016 8:43 am
Subject: Re: [Elecraft] KXPA100 with PX3



>>http://www.elecraft.com/manual/PX3_installation_FAQ_v-0-8.pdf  see Figure 3.


>When I tried that, I got no output from the KXPA100 with the KX3 PA MODE set 
>to ON.  If I set that to OFF, I get full output but then not full interaction 
>with the KX3.  What am I doing wrong?




So are you saying that you have the KX3, PX3, and KXPA100 all connected in the 
exact manner depicted in Figure 3 (which also appears in the PX3 manual) and 
you're still experiencing this problem? Maybe I'm mistaken, but it sounds like 
you aren't using the KX3-KXPA100 adapter cable. You can't just connect the 
KXPA100 RS232 port directly to the KX3 ACC1 port.



73, Ryan AI6DO


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Re: [Elecraft] KXPA100 with PX3

[Cady, Fred]

Make sure all of the plugs are fully seated in their sockets.

73,

Fred KE7X


For all KE7X Elecraft books, see www.ke7x.com



From: Elecraft  on behalf of Ryan Noguchi via 
Elecraft 
Sent: Friday, December 30, 2016 8:38 AM
To: rsoif...@aol.com; elecraft@mailman.qth.net
Subject: Re: [Elecraft] KXPA100 with PX3

>>http://www.elecraft.com/manual/PX3_installation_FAQ_v-0-8.pdf  see Figure 3.
>When I tried that, I got no output from the KXPA100 with the KX3 PA MODE set 
>to ON.  If I set that to OFF, I get full output but then not full interaction 
>with the KX3.  What am I doing wrong?

So are you saying that you have the KX3, PX3, and KXPA100 all connected in the 
exact manner depicted in Figure 3 (which also appears in the PX3 manual) and 
you're still experiencing this problem? Maybe I'm mistaken, but it sounds like 
you aren't using the KX3-KXPA100 adapter cable. You can't just connect the 
KXPA100 RS232 port directly to the KX3 ACC1 port.

73, Ryan AI6DO
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Re: [Elecraft] KXPA100 with PX3

[Ray W2RS via Elecraft]

The KX3 says it has the KXPA100 behind it, but I still get no output.  When I 
turn PA MODE to OFF, and turn the amp ON using the front panel switch, I get 
full output but in Basic mode.


73 Ray W2RS



-Original Message-
From: Cady, Fred 
To: rsoifer1 ; Ryan Noguchi 
Cc: Elecraft list 
Sent: Fri, Dec 30, 2016 9:24 am
Subject: Re: [Elecraft] KXPA100 with PX3



Make sure all of the plugs are fully seated in their sockets.
73,
Fred KE7X


For all KE7X Elecraft books, see www.ke7x.com





From: Elecraft  on behalf of Ryan Noguchi via 
Elecraft 
Sent: Friday, December 30, 2016 8:38 AM
To: rsoif...@aol.com; elecraft@mailman.qth.net
Subject: Re: [Elecraft] KXPA100 with PX3
 

>>http://www.elecraft.com/manual/PX3_installation_FAQ_v-0-8.pdf  see Figure 3.
>When I tried that, I got no output from the KXPA100 with the KX3 PA MODE set 
>to ON.  If I set that to OFF, I get full output but then not full interaction 
>with the KX3.  What am I doing wrong?

So are you saying that you have the KX3, PX3, and KXPA100 all connected in the 
exact manner depicted in Figure 3 (which also appears in the PX3 manual) and 
you're still experiencing this problem? Maybe I'm mistaken, but it sounds like 
you aren't using the KX3-KXPA100 adapter cable. You can't just connect the 
KXPA100 RS232 port directly to the KX3 ACC1 port.

73, Ryan AI6DO
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Re: [Elecraft] P3 For Sale

[Joe Word]

The P3 is sold>

Joe  N9VX

On Fri, Dec 30, 2016 at 4:30 AM, Joe Word  wrote:

> Email corrected...
> For Sale Elecraft P3-F factory built panadapter in as new condition with
> optional P3SVGA adapter for computer monitor use. No scratches and has not
> been around tobacco smoke. Serial number 36xx. No longer have a K3, so
> selling the P3. Comes with original box, manual and cable set: RF cable,
> data cable and 2 power cables (from P3 or from power supply). $720 plus
> help on shipping, $12 is about half, shipped in CONUS. Payment by money
> order, Cashier's check or cash. I do not have a Papal account. Contact me:
> n9vx.joe at gmail.com
>
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Re: [Elecraft] KXPA100 with PX3

[Don Wilhelm]

Ray,

Check to be certain the RJ-45 connectors are fully plugged in.  Some of 
them are difficult to seat if you hold onto the cover boot.  Pull the 
boot back and push the plug itself in until it clicks.


Make sure the other plugs are fully seated - give them an extra push 
into their jacks.


73,
Don W3FPR

On 12/30/2016 11:50 AM, Ray W2RS via Elecraft wrote:

The KX3 says it has the KXPA100 behind it, but I still get no output.  When I 
turn PA MODE to OFF, and turn the amp ON using the front panel switch, I get 
full output but in Basic mode.


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[Elecraft] Please do a KPA1500

[Fredric Serota]

Now more than ever there is a need for a 1500 watt amplifier of the quality and 
function of the KPA500. PLEASE, Elecraft, reconsider your decision to produce a 
KPA 1500. You could use the front end of the KPA500 as a controller?

Fred Serota, K3BHX
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Re: [Elecraft] KXPA100 with PX3

[Dave AD6A]

You may simply have the power set too low (below 11W) for the KXPA100 to turn 
on. 

73 Dave AD6A

Sent from my  iPhone 5s

> On Dec 30, 2016, at 9:22 AM, Don Wilhelm  wrote:
> 
> Ray,
> 
> Check to be certain the RJ-45 connectors are fully plugged in.  Some of them 
> are difficult to seat if you hold onto the cover boot.  Pull the boot back 
> and push the plug itself in until it clicks.
> 
> Make sure the other plugs are fully seated - give them an extra push into 
> their jacks.
> 
> 73,
> Don W3FPR
> 
>> On 12/30/2016 11:50 AM, Ray W2RS via Elecraft wrote:
>> The KX3 says it has the KXPA100 behind it, but I still get no output.  When 
>> I turn PA MODE to OFF, and turn the amp ON using the front panel switch, I 
>> get full output but in Basic mode.
>> 
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Re: [Elecraft] EFHW (was Small QRP antenna)

[Jim Brown]

On Fri,12/30/2016 6:02 AM, Michael Babineau wrote:

Anyone interested in EFHW antennas should read Steve, AA5TB’s excellent website


Here's another great way to end feed a half wave that Steve didn't think 
of. It originated with an idea that N6LF published.


http://k9yc.com/VerticalDipole.pdf

Using a connector and barrel for the center was W6GJB's idea. For 
backpacking, a BNC to female Pomona adapter (Pomona is the official name 
for double banana jacks and plugs) could be used instead. To make this a 
multiband antenna, simply use a shorter or longer piece of wire for the 
top end and move the choke to a matching position along the coax.


73, Jim K9YC

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[Elecraft] Want to add SVGA and P3TXMON to your P3?

[John W2ID]

I have a P3SVGA with P3TXMON and DCHF-2000 (160m - 6m 2000 KW Directional 
Coupler).

The P3 is S/N 37xx and everything works perfectly, and is in as-new condition 
with no scratches/dents etc., and lives in a non-smoking home.

I don't use the SVGA option or the directional coupler, so I would like to 
trade my unit for your perfectly working P3 plus some cash. Your P3 must be in 
similar condition, working perfectly, and never exposed to cigarette smoke.

The new price for the SVGA option is $289.95 and the TXMON is $199.95, for a 
total of $489.90.
Here's a nice easy way to save some money and add these options without any 
tools needed.

Not sure exactly how to price this, so I will sell to the highest offer 
received by 2359z January 8, 2017.
You pay to ship yours, and I'll pay to ship mine.

73 and Happy New Year,

John W2ID
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Re: [Elecraft] Please do a KPA1500

[Dean L]

Fred
500w 》1500 w -It's less than an S-unit increase in signal and makes
your power meter spin fast.
Just putting it into perspective ...I'm sure you already knew this.
Happy New Year/73
Dean K2WW

On Dec 30, 2016 12:36 PM, "Fredric Serota"  wrote:

> Now more than ever there is a need for a 1500 watt amplifier of the
> quality and function of the KPA500. PLEASE, Elecraft, reconsider your
> decision to produce a KPA 1500. You could use the front end of the KPA500
> as a controller?
>
> Fred Serota, K3BHX
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Re: [Elecraft] K2 and Kenwood SP-50 Mic

[ken mcmahon]

Thanks Jim,

I should have mentioned;

I already have the 8 pin DIN connector at the rig end of the mic cable.
However, I don't know what the pin-outs are.
I've Googled it to no avail...

Page 18 of the KSB2 manual shows info for the MC-60 and I don't want to
assume it matches the MC-50.

Thanks,

Ken - WZ6P
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Re: [Elecraft] Please do a KPA1500

[Jim Brown]

On Fri,12/30/2016 10:27 AM, Dean L wrote:

500w 》1500 w -It's less than an S-unit increase in signal


Anyone who has tried to work a station who doesn't hear well because of 
a high noise level, or with a poor signal path, knows that even 1 or 2 
dB can be the difference between making a QSO or not. I have experienced 
this MANY times. On 160M, the band is often full from 1,800 to above 
1,900 kHz during contests, and most amps need to be re-tuned to get full 
output when moving from one end to the other. If I got lazy and failed 
to do that, my 1.5 kW amp might be down to 1 kW or so, That's less than 
2dB, but there have been times when re-tuning would get the other 
station to hear me when he hadn't responded to multiple calls.


73, Jim K9YC

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Re: [Elecraft] K2 and Kenwood SP-50 Mic

[Jim Brown]

On Fri,12/30/2016 10:30 AM, ken mcmahon wrote:

Page 18 of the KSB2 manual shows info for the MC-60 and I don't want to
assume it matches the MC-50.


Ken,

Connector pin-outs tend to be consistent within a brand of radio. 
Kenwood, Icom, and Yaesu each have their own way of doing it, and they 
are all different from each other.


73, Jim K9YC

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Re: [Elecraft] KXPA100 with PX3

[Bob N3MNT]

How are you turning the KX3 and KXPA100 on and off.  If you shut down the
power supply with the KX3 powered on, it will default to PA off  and power
our <10 watts and stay that way until you manually go back and turn PA on
and change power level on KX3 to require the amp to be on.  You should
control the KX3 and KXPA100 power via the power on /off sequence on the KX3.




--
View this message in context: 
http://elecraft.365791.n2.nabble.com/KXPA100-with-PX3-tp7625187p7625206.html
Sent from the Elecraft mailing list archive at Nabble.com.
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Re: [Elecraft] Small QRP antenna

[Jim Allen]

My experience matches this precisely.

~35 years ago, I built the huge quad described in "Evolution of a Quad Array" 
from an article in QST, May 1978, IIRC.  It was done with help from experienced 
antenna builders, measured very meticulously.  When we finally got it up on the 
tower, it was awful, weird SWRs, no F/B, nothing seemed right.  I checked all 
the feedlines and connectors.  Nothing amiss.

I had found a roll of No. 12 insulated wire at a surplus place and used that 
for all the elements.  In discussions with the owner of the quad in the article 
and the designer, we concluded the problem was the insulation, as the design 
used enameled No. 12, different velocity factor.  I spent the next ~2 weeks of 
evenings, until 10-11 at night, with a pocket knife on my roof scraping 
insulation from ~1200' of wire in situ.  Not only was it no fun, the neighbors 
never looked at me the same again.  Once that was done, the antenna performed 
wonderfully, as expected.
73 Jim Allen W6OGC 
> Walt, I differ, antenna wires do have a velocity factor to consider. I built 
> a 6 meter Moxon beam for my grandson out of insulated wire, and the resonant 
> frequency was considerably low. Stripping the insulation from the wire 
> brought its resonance point up to what was expected. The only reason was 
> because the velocity factor for the insulated wire was less than that of 
> non-insulated wire. 73, Don W3FPR

> On 12/29/2016 6:33 PM, Walter Underwood wrote: > This is quite likely overly 
> pedantic, but “velocity factor” is a characteristic of transmission lines. 
> Interestingly, it is independent of frequency (up to the limit of the 
> dielectric). It depends on the geometry of the line and the dielectric 
> material. > > Antennas don’t have a velocity factor. The shortened elements 
> are caused by capacitive loading against (RF) ground. There is a percentage 
> of the free-space electrical length due to capacitive loading, but it is not 
> a velocity factor. I don’t think this has a snappy shorthand other than 
> “electrical lengthening due to capacitive loading”. > > For example, dipoles 
> with capacity caps on the ends, like the N6BT designs, don’t change the 
> velocity of propagation along the elements. They use massive capacity loading 
> on the ends (the high-voltage part of the dipole) to shorten the elements. > 
> > 
> http://www.force12inc.com/products/sigma-20-hd-20-meter-heavy-duty-vertical-dipole.html
>  
> 
>  > > OK, overly pedantic mode off, plus I’ve nearly hit the limit of what I 
> remember from my fields and waves class decades ago. I was pretty happy to 
> get a B- in that class. > > wunder > K6WRU > Walter Underwood > CM87wj > 
> http://observer.wunderwood.org/ (my blog) >
> 
> Sent from my iPad
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Re: [Elecraft] K2 and Kenwood SP-50 Mic

[Don Wilhelm]

A multitude of microphone information can be found at 
http://www.qsl.net/g4wpw/date.html.  Thank QSL.net for preserving this 
website information, G4WPW is now SK.


73,
Don W3FPR

On 12/30/2016 1:44 PM, Jim Brown wrote:

On Fri,12/30/2016 10:30 AM, ken mcmahon wrote:

Page 18 of the KSB2 manual shows info for the MC-60 and I don't want to
assume it matches the MC-50.


Ken,

Connector pin-outs tend to be consistent within a brand of radio.
Kenwood, Icom, and Yaesu each have their own way of doing it, and they
are all different from each other.

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Re: [Elecraft] KXPA100 with PX3

[Ray W2RS via Elecraft]

Ryan,


Yes, I am using the correct adapter cable.


73 Ray W2RS


-Original Message-
From: Ryan Noguchi 
To: rsoifer1 ; elecraft 
Sent: Fri, Dec 30, 2016 8:43 am
Subject: Re: [Elecraft] KXPA100 with PX3



>>http://www.elecraft.com/manual/PX3_installation_FAQ_v-0-8.pdf  see Figure 3.


>When I tried that, I got no output from the KXPA100 with the KX3 PA MODE set 
>to ON.  If I set that to OFF, I get full output but then not full interaction 
>with the KX3.  What am I doing wrong?




So are you saying that you have the KX3, PX3, and KXPA100 all connected in the 
exact manner depicted in Figure 3 (which also appears in the PX3 manual) and 
you're still experiencing this problem? Maybe I'm mistaken, but it sounds like 
you aren't using the KX3-KXPA100 adapter cable. You can't just connect the 
KXPA100 RS232 port directly to the KX3 ACC1 port.



73, Ryan AI6DO


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Re: [Elecraft] Please do a KPA1500

[Charlie T, K3ICH]

If you're being heard at 20 dB over S9 when running one kilowatt, you'll still 
be S5 at 100 milliwatts!

That said, if you're gonna run an amp, why not go for max legal?

73, Charlie k3ICH



-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Dean L
Sent: Friday, December 30, 2016 1:28 PM
To: Elecraft Mail List 
Subject: Re: [Elecraft] Please do a KPA1500

Fred
500w 》1500 w -It's less than an S-unit increase in signal and makes your 
power meter spin fast.
Just putting it into perspective ...I'm sure you already knew this.
Happy New Year/73
Dean K2WW



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Re: [Elecraft] KXPA100 with PX3

[Ray W2RS via Elecraft]

Further to my last email, when I am in Basic mode, with PA MODE set to OFF and 
the KXPA100 on/off switch set to ON, I get full power out and no dissipation.  
When PA MODE is ON and the on/off switch set to OFF, the KX3 acts like the 
KXPA100 is connected to it but there is no power output from the KXPA100 but 
all the power it produces is being dissipated.  Some setting is probably wrong, 
but I can't figure out which one.


Any ideas?


73 Ray W2RS



-Original Message-
From: Dave AD6A with
To: donwilh 
Cc: rsoifer1 ; fcady ; ai6do 
; elecraft 
Sent: Fri, Dec 30, 2016 10:39 am
Subject: Re: [Elecraft] KXPA100 with PX3

You may simply have the power set too low (below 11W) for the KXPA100 to turn 
on. 

73 Dave AD6A

Sent from my  iPhone 5s

> On Dec 30, 2016, at 9:22 AM, Don Wilhelm  wrote:
> 
> Ray,
> 
> Check to be certain the RJ-45 connectors are fully plugged in.  Some of them 
> are difficult to seat if you hold onto the cover boot.  Pull the boot back 
> and push the plug itself in until it clicks.
> 
> Make sure the other plugs are fully seated - give them an extra push into 
> their jacks.
> 
> 73,
> Don W3FPR
> 
>> On 12/30/2016 11:50 AM, Ray W2RS via Elecraft wrote:
>> The KX3 says it has the KXPA100 behind it, but I still get no output.  When 
>> I turn PA MODE to OFF, and turn the amp ON using the front panel switch, I 
>> get full output but in Basic mode.
>> 
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Re: [Elecraft] Please do a KPA1500

[Guy Olinger K2AV]

On Dec 30, 2016 12:36 PM, "Fredric Serota"  wrote:
> Now more than ever there is a need for a 1500 watt amplifier of the
> quality and function of the KPA500. PLEASE, Elecraft, reconsider your
> decision to produce a KPA 1500.

Without debating how much use is had from a 5 dB increase in signal
strength (a lot), the real reason Elecraft did not do a 1500 watt amp
is all business and marketing. Elecraft is a small business and as
such does not have the financial "mass" to absorb jabs in the bank
balance from the marketplace that do not doubly pay for the research
and development.

There is a breaking point for ham-priced transistor amp equipment
somewhere beyond 500 watts and before 1500 that has to do with
reliability of components at those stress levels, and the cost of
components and circuits to control the amp's response to the
unbelievably bad treatment afforded amps by some purchasers.

If this were not true, you would have seen dozens of 2K transistor
equivalents to the likes of the Alpha 9500 and 8410, with which you
can actually put a brick on the key and let it run at 1500 watts out
indefinitely or until you lose your nerve.

I'm sure the military has stuff, but then the military has specs and
bidding, and they are willing to pay what it REALLY costs for that
layer of reliability.

Hams are unwilling to pay mil-spec prices, and Big E. knows it. They
also know that a major failure of an expensively developed product
with a lot of warranty returns can put a small business into chapter
11.

Wayne & Co have put out a lot of leading edge products, kept their
business rolling through the Great Recession, and embarassed the fool
out of Yakencom for the better part of a decade, kicking the ham
equipment industry into a new level of performance where they really
didn't want to go.

When Wayne *doesn't* do something that gets repeated requests, there
is a reason. I trust his judgement, because he has earned that.

I particularly do not want them to go out of business and find myself
stuck with Yakencom again.

If it ain't broke, don't fix it.

73, Guy K2AV
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Re: [Elecraft] Please do a KPA1500

[Harry Yingst via Elecraft]

I kinda like the remote amp thought; My wife loves the heat and I like it cool.

I could put the amp in her craft room and let her enjoy the extra heat while my 
shack stays cooler.

  From: Fredric Serota 
 To: "elecraft@mailman.qth.net"  
 Sent: Friday, December 30, 2016 12:35 PM
 Subject: [Elecraft] Please do a KPA1500
   
Now more than ever there is a need for a 1500 watt amplifier of the quality and 
function of the KPA500. PLEASE, Elecraft, reconsider your decision to produce a 
KPA 1500. You could use the front end of the KPA500 as a controller?

Fred Serota, K3BHX
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Re: [Elecraft] KXPA100 with PX3

[Ryan Noguchi via Elecraft]

>Further to my last email, when I am in Basic mode, with PA MODE set to OFF and 
>the KXPA100 on/off switch set to ON, I get full power out and no dissipation.  
>When PA MODE is ON and the on/off switch set to OFF, the KX3 acts like the 
>KXPA100 is connected to it but there is no power output from the KXPA100 but 
>all the power it produces is being dissipated.  Some setting is probably 
>wrong, but I can't figure out which one.




I'd suggest checking the ACC2 IO setting in the KX3 to make sure Tx keying 
isn't being inhibited. It's also possible that the interface cable is faulty. 

There's also the usual advice to make sure the firmware is current. My club's 
KX3 and KXPA100 were very unreliable until I updated their 2-3 year old 
firmware. Mostly intermittent problems with the ATU and even recognizing 
they're connected, but all that went away with fresh firmware. 

73, Ryan AI6DO
   
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Re: [Elecraft] KXPA100 with PX3

[Don Wilhelm]

Ray,

Does the power light on the KXPA100 turn on when you power on the KX3?

I am not sure about your statements about "all the power it produces is 
being dissipated"
Dissipated where?  Into power output or into heat?  Does the heatsink 
heat up?


Similarly, your statement about "no power dissipated" when in basic mode.

Can you connect an external wattmeter and a dummy load, put the KXAT100 
into bypass and see what the KXPA100 is really producing. That more 
detailed information will aid in answering your question.  If you can 
measure the current draw and voltage during keydown that would help even 
more.


73,
Don W3FPR

On 12/30/2016 3:16 PM, rsoif...@aol.com wrote:
Further to my last email, when I am in Basic mode, with PA MODE set to 
OFF and the KXPA100 on/off switch set to ON, I get full power out and 
no dissipation.  When PA MODE is ON and the on/off switch set to OFF, 
the KX3 acts like the KXPA100 is connected to it but there is no power 
output from the KXPA100 but all the power it produces is being 
dissipated.  Some setting is probably wrong, but I can't figure out 
which one.





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Re: [Elecraft] Please do a KPA1500

[German Duran]

I agree. German HK3J

El vie., 30 dic. 2016 3:18 p. m., Guy Olinger K2AV 
escribió:

> On Dec 30, 2016 12:36 PM, "Fredric Serota"  wrote:
> > Now more than ever there is a need for a 1500 watt amplifier of the
> > quality and function of the KPA500. PLEASE, Elecraft, reconsider your
> > decision to produce a KPA 1500.
>
> Without debating how much use is had from a 5 dB increase in signal
> strength (a lot), the real reason Elecraft did not do a 1500 watt amp
> is all business and marketing. Elecraft is a small business and as
> such does not have the financial "mass" to absorb jabs in the bank
> balance from the marketplace that do not doubly pay for the research
> and development.
>
> There is a breaking point for ham-priced transistor amp equipment
> somewhere beyond 500 watts and before 1500 that has to do with
> reliability of components at those stress levels, and the cost of
> components and circuits to control the amp's response to the
> unbelievably bad treatment afforded amps by some purchasers.
>
> If this were not true, you would have seen dozens of 2K transistor
> equivalents to the likes of the Alpha 9500 and 8410, with which you
> can actually put a brick on the key and let it run at 1500 watts out
> indefinitely or until you lose your nerve.
>
> I'm sure the military has stuff, but then the military has specs and
> bidding, and they are willing to pay what it REALLY costs for that
> layer of reliability.
>
> Hams are unwilling to pay mil-spec prices, and Big E. knows it. They
> also know that a major failure of an expensively developed product
> with a lot of warranty returns can put a small business into chapter
> 11.
>
> Wayne & Co have put out a lot of leading edge products, kept their
> business rolling through the Great Recession, and embarassed the fool
> out of Yakencom for the better part of a decade, kicking the ham
> equipment industry into a new level of performance where they really
> didn't want to go.
>
> When Wayne *doesn't* do something that gets repeated requests, there
> is a reason. I trust his judgement, because he has earned that.
>
> I particularly do not want them to go out of business and find myself
> stuck with Yakencom again.
>
> If it ain't broke, don't fix it.
>
> 73, Guy K2AV
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[Elecraft] [KX3] USB sound card functionality in the future?

[Dave Hartzell]

I'm not sure what the upgrade and refresh cycle is for the KX3, but I'm
wondering if there will ever be KIO3-like capability added to the KX3 (or
KX2).

Mainly so the radio shows up as a sound card over the USB...

Dave
ad0qe
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Re: [Elecraft] Please do a KPA1500

[Ken G Kopp]

I have no interest in a 1 or 1.5 KW Amp.

Guy (K2AV) sums it up nicely.

73!

Ken Kopp - K0PP

On Dec 30, 2016 1:18 PM, "Guy Olinger K2AV"  wrote:

> On Dec 30, 2016 12:36 PM, "Fredric Serota"  wrote:
> > Now more than ever there is a need for a 1500 watt amplifier of the
> > quality and function of the KPA500. PLEASE, Elecraft, reconsider your
> > decision to produce a KPA 1500.
>
> Without debating how much use is had from a 5 dB increase in signal
> strength (a lot), the real reason Elecraft did not do a 1500 watt amp
> is all business and marketing. Elecraft is a small business and as
> such does not have the financial "mass" to absorb jabs in the bank
> balance from the marketplace that do not doubly pay for the research
> and development.
>
> There is a breaking point for ham-priced transistor amp equipment
> somewhere beyond 500 watts and before 1500 that has to do with
> reliability of components at those stress levels, and the cost of
> components and circuits to control the amp's response to the
> unbelievably bad treatment afforded amps by some purchasers.
>
> If this were not true, you would have seen dozens of 2K transistor
> equivalents to the likes of the Alpha 9500 and 8410, with which you
> can actually put a brick on the key and let it run at 1500 watts out
> indefinitely or until you lose your nerve.
>
> I'm sure the military has stuff, but then the military has specs and
> bidding, and they are willing to pay what it REALLY costs for that
> layer of reliability.
>
> Hams are unwilling to pay mil-spec prices, and Big E. knows it. They
> also know that a major failure of an expensively developed product
> with a lot of warranty returns can put a small business into chapter
> 11.
>
> Wayne & Co have put out a lot of leading edge products, kept their
> business rolling through the Great Recession, and embarassed the fool
> out of Yakencom for the better part of a decade, kicking the ham
> equipment industry into a new level of performance where they really
> didn't want to go.
>
> When Wayne *doesn't* do something that gets repeated requests, there
> is a reason. I trust his judgement, because he has earned that.
>
> I particularly do not want them to go out of business and find myself
> stuck with Yakencom again.
>
> If it ain't broke, don't fix it.
>
> 73, Guy K2AV
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Re: [Elecraft] [KX3] USB sound card functionality in the future?

[Don Wilhelm]

Dave,

I seriously doubt it.  If you look inside the KX3 or the KX2, there is 
not much space.
Secondly, the way the KX3, PX3 and KXPA100 'string together" for the 
RS-232 (ACC1) connections, both the PX3 and KXPA100 would have to change 
to support USB and audio.  So I don't think that is going to happen.


Elecraft does not have a schedule of "upgrades and refresh" for any of 
their products.  That only happens on an as needed basis, or as 
engineering resources for that kind of effort become available.


Don't forget that the KIO3B addition for the K3 was possible only as a 
'sideline' during the development of the K3S.


73,
Don W3FPR

On 12/30/2016 3:54 PM, Dave Hartzell wrote:

I'm not sure what the upgrade and refresh cycle is for the KX3, but I'm
wondering if there will ever be KIO3-like capability added to the KX3 (or
KX2).

Mainly so the radio shows up as a sound card over the USB...

Dave
ad0qe
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Re: [Elecraft] Small QRP antenna

[Jim Brown]

Sorry Jim, you're mistaken on many counts.

An antenna does not have VF, but the wire we use for it does. VF of an 
infinitely thin bare wire in free space is 1.  Surrounding it with a 
dielectric (insulation) makes it longer electrically, usually by a few 
percent. So does making the wire fatter. These differences are usually 
described using VF.


Placing a conductor close to earth (within a few inches) causes it to 
couple to the earth, which also makes it electrically longer. We could 
also describe this using VF.


VF is NOT constant with frequency, whether in a transmission line or in 
wire. VF of all transmission lines starts out quite small at audio 
frequencies, rises quickly through the audio spectrum, eventually 
reaching a near constant value at mid-VHF. It is this near-constant 
value that is computed by the simple equation that doesn't include 
frequency. For most lines, VF has reached about 98% of its final value 
at 2 MHz.


Likewise, Zo is not constant with frequency, nor is it a pure 
resistance. It starts out quite high at low audio frequencies and is 
dominated by capacitance. Zo falls rapidly in the audio spectrum, and is 
quite close to its final value at 2 MHz, but is still capacitive, 
typically 1-2 ohms.


This can be clearly seen in N6BV's TLW software that comes on the CD 
with the ARRL Antenna Book. Choose your favorite coax, set the frequency 
to 2 MHz, make the line 300-400 ft long, and terminate it in a pure 
resistance. TLW will tell you Zo. Now select Volt/Current next to the 
Graph button (lower right corner) and you'll see  that there are 
standing waves on the line (the graphs are not a straight line). Now set 
the Load to the R and X values for Zo and hit Graph again. Now the V and 
I lines are nearly straight, indicating quite low SWR. They would lay 
exactly on top of each other, but the R and X values for Zo are rounded 
off.


The fact that Zo, VF, and attenuation vary with frequency is clearly 
predicted by the full transmission line equations. There's a brief 
discussion of this in

http://k9yc.com/Coax-Stubs.pdf
which also shows how VF and attenuation can be computed and plotted vs 
frequency by making two measurements of a sample with a vector analyzer 
like the AIM, SARK, and VNWA analyzers.  The two measurements are then 
exported to AC6LA's excellent freeware Excel spreadsheet called ZPlots.


There's a longer discussion of this, specifically written for audio 
people, but obviously important for radio, in

http://k9yc.com/TransLines-LowFreq.pdf

73, Jim K9YC

On Fri,12/30/2016 11:12 AM, Jim Allen wrote:

but “velocity factor” is a characteristic of transmission lines. Interestingly, it is 
independent of frequency (up to the limit of the dielectric). It depends on the 
geometry of the line and the dielectric material. > > Antennas don’t have a 
velocity factor. The shortened elements are caused by capacitive loading against (RF) 
ground. There is a percentage of the free-space electrical length due to capacitive 
loading, but it is not a velocity factor.



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Re: [Elecraft] Please do a KPA1500

[Ron D'Eau Claire]

The same argument goes for any 3:1 power ratio, but Ham radio is about having 
fun and if someone has more fun with QRO within legal limits, why not? 

In the 1960's I added a new final to a homebrew CW rig and went from 100 mW out 
to a full 1 Watt as soon as a suitable transistor became affordable. By 
comparison that was real QRO! Years later I happily upgraded my K2 from a 10 
watt rig to a 100 watt rig when the KPA100 became available.

73, Ron AC7AC 

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Dean L
Sent: Friday, December 30, 2016 10:28 AM
To: Elecraft Mail List
Subject: Re: [Elecraft] Please do a KPA1500

Fred
500w 》1500 w -It's less than an S-unit increase in signal and makes your 
power meter spin fast.
Just putting it into perspective ...I'm sure you already knew this.
Happy New Year/73
Dean K2WW

On Dec 30, 2016 12:36 PM, "Fredric Serota"  wrote:

> Now more than ever there is a need for a 1500 watt amplifier of the 
> quality and function of the KPA500. PLEASE, Elecraft, reconsider your 
> decision to produce a KPA 1500. You could use the front end of the 
> KPA500 as a controller?
>
> Fred Serota, K3BHX
> __

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Re: [Elecraft] [KX3] USB sound card functionality in the future?

[Dave Hartzell]

Interesting...  Not knowing much about the architecture, isn't most of the
hardware already on board to send samples out the USB?

Looking at the KX3 block diagram [1], I'm curious why you couldn't move
digital I/Q samples from the DSP to the PIC, then in/out to the USB port.

While I'm sure the existing I/Q port would work for me, its always nice to
be lazy and use one cable.  :)

1. http://www.elecraft.com/manual/KX3%20Manual%20Block%20Diagram.pdf


On Fri, Dec 30, 2016 at 2:15 PM, Don Wilhelm  wrote:

> Dave,
>
> I seriously doubt it.  If you look inside the KX3 or the KX2, there is not
> much space.
> Secondly, the way the KX3, PX3 and KXPA100 'string together" for the
> RS-232 (ACC1) connections, both the PX3 and KXPA100 would have to change to
> support USB and audio.  So I don't think that is going to happen.
>
> Elecraft does not have a schedule of "upgrades and refresh" for any of
> their products.  That only happens on an as needed basis, or as engineering
> resources for that kind of effort become available.
>
> Don't forget that the KIO3B addition for the K3 was possible only as a
> 'sideline' during the development of the K3S.
>
> 73,
> Don W3FPR
>
>
> On 12/30/2016 3:54 PM, Dave Hartzell wrote:
>
>> I'm not sure what the upgrade and refresh cycle is for the KX3, but I'm
>> wondering if there will ever be KIO3-like capability added to the KX3 (or
>> KX2).
>>
>> Mainly so the radio shows up as a sound card over the USB...
>>
>> Dave
>> ad0qe
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Re: [Elecraft] [KX3] USB sound card functionality in the future?

[Don Wilhelm]

Dave,

First of all, the audio for digital operations needs to come from the 
phones and mic lines.  The RX I/Q is taken off before any DSP Processing 
so the bandwidth is not restricted by the filtering done in the KX3.  In 
other words, the RX I/Q is not simply audio - it may be at baseband, but 
it is not the audio output of the KX3 - the post filtering audio and the 
pre-filtering baseband signals come from two different points in the 
receive chain and would have to be switched depending on whether you 
wanted a panadapter application or a digital mode application.


73,
Don W3FPR



On 12/30/2016 5:03 PM, Dave Hartzell wrote:

Interesting...  Not knowing much about the architecture, isn't most of the
hardware already on board to send samples out the USB?

Looking at the KX3 block diagram [1], I'm curious why you couldn't move
digital I/Q samples from the DSP to the PIC, then in/out to the USB port.

While I'm sure the existing I/Q port would work for me, its always nice to
be lazy and use one cable.  :)


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Re: [Elecraft] [KX3] USB sound card functionality in the future?

[Dave Hartzell]

Thanks Don.  Maybe someday it will be supported on the KX3-S  (or whatever
the follow-on will be called).



On Fri, Dec 30, 2016 at 3:21 PM, Don Wilhelm  wrote:

> Dave,
>
> First of all, the audio for digital operations needs to come from the
> phones and mic lines.  The RX I/Q is taken off before any DSP Processing so
> the bandwidth is not restricted by the filtering done in the KX3.  In other
> words, the RX I/Q is not simply audio - it may be at baseband, but it is
> not the audio output of the KX3 - the post filtering audio and the
> pre-filtering baseband signals come from two different points in the
> receive chain and would have to be switched depending on whether you wanted
> a panadapter application or a digital mode application.
>
> 73,
> Don W3FPR
>
>
>
>
> On 12/30/2016 5:03 PM, Dave Hartzell wrote:
>
>> Interesting...  Not knowing much about the architecture, isn't most of the
>> hardware already on board to send samples out the USB?
>>
>> Looking at the KX3 block diagram [1], I'm curious why you couldn't move
>> digital I/Q samples from the DSP to the PIC, then in/out to the USB port.
>>
>> While I'm sure the existing I/Q port would work for me, its always nice to
>> be lazy and use one cable.  :)
>>
>>
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Re: [Elecraft] [KX3] USB sound card functionality in the future?

[Don Wilhelm]

Dave,

Whatever it is, there will be no hyphens in the designation. Elecraft 
does not use hyphens in its product names (other than the N-Gen and 
2T-Gen mini-modules).


73,
Don W3FPR

On 12/30/2016 5:25 PM, Dave Hartzell wrote:
Thanks Don.  Maybe someday it will be supported on the KX3-S  (or 
whatever the follow-on will be called).






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[Elecraft] {OT} - Variation on use of a coaxial switch

[stan levandowski]

I would like to use a coaxial switch for an unintended use and I'm not 
sure if it's a good idea in terms of RF isolation and potential 
equipment damage.


I'm no expert in this area but I know this list is a wealth of expert 
opinion, so here's my question:



I want to buy a two position coaxial switch.  I want to connect ONE 
antenna to it and switch this antenna between a KX2/KXPA100 (100 watts) 
and a KX1 (about 3 watts).  The coax cable coming from this switch to 
the KX2 is a short piece of RG8X and the coax cable going from this 
switch to the KX1 is 25' of RG-174 (yes, I already computed the dB loss 
and I can live with). 



Am I likely to cause any damage to to either piece of equipment?


Thanks,
Stan WB2LQF



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Re: [Elecraft] Please do a KPA1500

[Eric Swartz - WA6HHQ, Elecraft]

Folks, we have not ever formally said we would never do a 1500W amp. We have 
said at times in the past that we were not doing one at that time, but we never 
rule anything out.


We're always looking for good suggestions and marketing input on what we should 
do in the future.


73,
Eric
/elecraft.com/

On 12/30/2016 12:16 PM, Guy Olinger K2AV wrote:

On Dec 30, 2016 12:36 PM, "Fredric Serota"  wrote:

Now more than ever there is a need for a 1500 watt amplifier of the
quality and function of the KPA500. PLEASE, Elecraft, reconsider your
decision to produce a KPA 1500.

Without debating how much use is had from a 5 dB increase in signal
strength (a lot), the real reason Elecraft did not do a 1500 watt amp
is all business and marketing. Elecraft is a small business and as
such does not have the financial "mass" to absorb jabs in the bank
balance from the marketplace that do not doubly pay for the research
and development.

There is a breaking point for ham-priced transistor amp equipment
somewhere beyond 500 watts and before 1500 that has to do with
reliability of components at those stress levels, and the cost of
components and circuits to control the amp's response to the
unbelievably bad treatment afforded amps by some purchasers.

If this were not true, you would have seen dozens of 2K transistor
equivalents to the likes of the Alpha 9500 and 8410, with which you
can actually put a brick on the key and let it run at 1500 watts out
indefinitely or until you lose your nerve.

I'm sure the military has stuff, but then the military has specs and
bidding, and they are willing to pay what it REALLY costs for that
layer of reliability.

Hams are unwilling to pay mil-spec prices, and Big E. knows it. They
also know that a major failure of an expensively developed product
with a lot of warranty returns can put a small business into chapter
11.

Wayne & Co have put out a lot of leading edge products, kept their
business rolling through the Great Recession, and embarassed the fool
out of Yakencom for the better part of a decade, kicking the ham
equipment industry into a new level of performance where they really
didn't want to go.

When Wayne *doesn't* do something that gets repeated requests, there
is a reason. I trust his judgement, because he has earned that.

I particularly do not want them to go out of business and find myself
stuck with Yakencom again.

If it ain't broke, don't fix it.

73, Guy K2AV
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Re: [Elecraft] Small QRP antenna

[Jim Allen]

Sorry, Jim, you are misquoting the wrong guy.  Tweren't me, McGee.

73 Jim Allen W6OGC 
> Message: 24
> Date: Fri, 30 Dec 2016 13:25:28 -0800
> From: Jim Brown 
> To: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] Small QRP antenna
> Message-ID:
>
> Content-Type: text/plain; charset=utf-8; format=flowed
> 
> Sorry Jim, you're mistaken on many counts.
> 
> An antenna does not have VF, but the wire we use for it does. VF of an 
> infinitely thin bare wire in free space is 1.  Surrounding it with a 
> dielectric (insulation) makes it longer electrically, usually by a few 
> percent. So does making the wire fatter. These differences are usually 
> described using VF.
> 
> Placing a conductor close to earth (within a few inches) causes it to 
> couple to the earth, which also makes it electrically longer. We could 
> also describe this using VF.
> 
> VF is NOT constant with frequency, whether in a transmission line or in 
> wire. VF of all transmission lines starts out quite small at audio 
> frequencies, rises quickly through the audio spectrum, eventually 
> reaching a near constant value at mid-VHF. It is this near-constant 
> value that is computed by the simple equation that doesn't include 
> frequency. For most lines, VF has reached about 98% of its final value 
> at 2 MHz.
> 
> Likewise, Zo is not constant with frequency, nor is it a pure 
> resistance. It starts out quite high at low audio frequencies and is 
> dominated by capacitance. Zo falls rapidly in the audio spectrum, and is 
> quite close to its final value at 2 MHz, but is still capacitive, 
> typically 1-2 ohms.
> 
> This can be clearly seen in N6BV's TLW software that comes on the CD 
> with the ARRL Antenna Book. Choose your favorite coax, set the frequency 
> to 2 MHz, make the line 300-400 ft long, and terminate it in a pure 
> resistance. TLW will tell you Zo. Now select Volt/Current next to the 
> Graph button (lower right corner) and you'll see  that there are 
> standing waves on the line (the graphs are not a straight line). Now set 
> the Load to the R and X values for Zo and hit Graph again. Now the V and 
> I lines are nearly straight, indicating quite low SWR. They would lay 
> exactly on top of each other, but the R and X values for Zo are rounded 
> off.
> 
> The fact that Zo, VF, and attenuation vary with frequency is clearly 
> predicted by the full transmission line equations. There's a brief 
> discussion of this in
> http://k9yc.com/Coax-Stubs.pdf
> which also shows how VF and attenuation can be computed and plotted vs 
> frequency by making two measurements of a sample with a vector analyzer 
> like the AIM, SARK, and VNWA analyzers.  The two measurements are then 
> exported to AC6LA's excellent freeware Excel spreadsheet called ZPlots.
> 
> There's a longer discussion of this, specifically written for audio 
> people, but obviously important for radio, in
> http://k9yc.com/TransLines-LowFreq.pdf
> 
> 73, Jim K9YC
> 
>> On Fri,12/30/2016 11:12 AM, Jim Allen wrote:
>> but ?velocity factor? is a characteristic of transmission lines. 
>> Interestingly, it is independent of frequency (up to the limit of the 
>> dielectric). It depends on the geometry of the line and the dielectric 
>> material. > > Antennas don?t have a velocity factor. The shortened elements 
>> are caused by capacitive loading against (RF) ground. There is a percentage 
>> of the free-space electrical length due to capacitive loading, but it is not 
>> a velocity factor.
> 
> *
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Re: [Elecraft] Please do a KPA1500

[Mike va3mw]

That will be a lot of money for only an extra S unit (barely). Just over a 4db 
gain off the top of my head. 

It is the first 500 W that count. 

Mike va3mw



> On Dec 30, 2016, at 1:27 PM, Dean L  wrote:
> 
> Fred
> 500w 》1500 w -It's less than an S-unit increase in signal and makes
> your power meter spin fast.
> Just putting it into perspective ...I'm sure you already knew this.
> Happy New Year/73
> Dean K2WW
> 
>> On Dec 30, 2016 12:36 PM, "Fredric Serota"  wrote:
>> 
>> Now more than ever there is a need for a 1500 watt amplifier of the
>> quality and function of the KPA500. PLEASE, Elecraft, reconsider your
>> decision to produce a KPA 1500. You could use the front end of the KPA500
>> as a controller?
>> 
>> Fred Serota, K3BHX
>> __
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[Elecraft] K3S Bundle Offer ends on December 31. (end of day)

[Eric Swartz - WA6HHQ, Elecraft]

Countdown to 2017! Don't miss out on the K3S Bundle Offer - It ends on December 
31. (end of day)


For details, see:  http://www.elecraft.com/K3sBundleSale.htm  and also the K3S 
section of our order form.


73,
Eric
/elecraft.com/

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Re: [Elecraft] Please do a KPA1500

[N2TK, Tony]

During mediocre conditions there has been more than once on 80 and 160M the DX 
could not quite get my call correct with the KPA500. Once the Acom 2000A timed 
out they had no trouble copying my call. Most of the time I operate the K3 
barefoot. When I need more oomph I turn on the KPA500. If conditions are not 
good I turn on the Acom. There are times the difference between 600W and 1500W 
can make the difference between a QSO and no QSO. It would be nice to have a 
1500W S-S amp in the basement alongside the KPA500. Any amp I would buy needs 
to be able to be controlled remotely like the KPA500 and the Acom. The only 
real advantage to me switching from a tube to a solid-state amp would be the 
timeout thing. During a contest and when a DXpedition is going, then I just 
leave the Acom on. No big thing letting it sit there idling.

73 and HNY
N2TK, Tony 

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Mike va3mw
Sent: Friday, December 30, 2016 6:09 PM
To: Dean L 
Cc: Elecraft Mail List 
Subject: Re: [Elecraft] Please do a KPA1500

That will be a lot of money for only an extra S unit (barely). Just over a 4db 
gain off the top of my head. 

It is the first 500 W that count. 

Mike va3mw



> On Dec 30, 2016, at 1:27 PM, Dean L  wrote:
> 
> Fred
> 500w 》1500 w -It's less than an S-unit increase in signal and 
> makes your power meter spin fast.
> Just putting it into perspective ...I'm sure you already knew this.
> Happy New Year/73
> Dean K2WW
> 
>> On Dec 30, 2016 12:36 PM, "Fredric Serota"  wrote:
>> 
>> Now more than ever there is a need for a 1500 watt amplifier of the 
>> quality and function of the KPA500. PLEASE, Elecraft, reconsider your 
>> decision to produce a KPA 1500. You could use the front end of the 
>> KPA500 as a controller?
>> 
>> Fred Serota, K3BHX
>> __
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>> dean.k...@gmail.com
>> 
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Re: [Elecraft] K3S Bundle Offer ends on December 31. (end of day)

[Clay Autery]

Nice!

Perhaps y'all will consider working up a promo for a KPA500/KAT500 combo
in the future

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

On 12/30/2016 5:35 PM, Eric Swartz - WA6HHQ, Elecraft wrote:
> Countdown to 2017! Don't miss out on the K3S Bundle Offer - It ends on
> December 31. (end of day)
>
> For details, see:  http://www.elecraft.com/K3sBundleSale.htm  and also
> the K3S section of our order form.
>
> 73,
> Eric
> /elecraft.com/
>
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Re: [Elecraft] {OT} - Variation on use of a coaxial switch

[Don Wilhelm]

Stan,

If your maximum power is 100 watts and the isolation of the switch is 
40dB or more then I don't think you have any problem.


73,
Don W3FPR

On 12/30/2016 5:49 PM, stan levandowski wrote:

I would like to use a coaxial switch for an unintended use and I'm not
sure if it's a good idea in terms of RF isolation and potential
equipment damage.

I'm no expert in this area but I know this list is a wealth of expert
opinion, so here's my question:


I want to buy a two position coaxial switch.  I want to connect ONE
antenna to it and switch this antenna between a KX2/KXPA100 (100 watts)
and a KX1 (about 3 watts).  The coax cable coming from this switch to
the KX2 is a short piece of RG8X and the coax cable going from this
switch to the KX1 is 25' of RG-174 (yes, I already computed the dB loss
and I can live with).


Am I likely to cause any damage to to either piece of equipment?


Thanks,
Stan WB2LQF



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Re: [Elecraft] {OT} - Variation on use of a coaxial switch

[Bob Nielsen]

As long as there is sufficient isolation in the switch there should be 
no problem.  I have done exactly as you describe with my KX2 and IC-7100 
using a MFJ-1702C switch, which is rated for better than 60 dB of 
isolation to 300 MHz.


Bob, N7XY

On 12/30/16 2:49 PM, stan levandowski wrote:
I would like to use a coaxial switch for an unintended use and I'm not 
sure if it's a good idea in terms of RF isolation and potential 
equipment damage.


I'm no expert in this area but I know this list is a wealth of expert 
opinion, so here's my question:



I want to buy a two position coaxial switch.  I want to connect ONE 
antenna to it and switch this antenna between a KX2/KXPA100 (100 
watts) and a KX1 (about 3 watts).  The coax cable coming from this 
switch to the KX2 is a short piece of RG8X and the coax cable going 
from this switch to the KX1 is 25' of RG-174 (yes, I already computed 
the dB loss and I can live with).



Am I likely to cause any damage to to either piece of equipment?


Thanks,
Stan WB2LQF



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Re: [Elecraft] {OT} - Variation on use of a coaxial switch

[Bill Rowlett]

Been using two old B&W 5 position switches to switch between rigs and antennas. 
No problems, though I run 10 watts or less.

73  Bill  KC4ATU


On Dec 30, 2016, at 6:47 PM, Bob Nielsen mailto:n...@n7xy.net>> 
wrote:

As long as there is sufficient isolation in the switch there should be no 
problem.  I have done exactly as you describe with my KX2 and IC-7100 using a 
MFJ-1702C switch, which is rated for better than 60 dB of isolation to 300 MHz.

Bob, N7XY

On 12/30/16 2:49 PM, stan levandowski wrote:
I would like to use a coaxial switch for an unintended use and I'm not sure if 
it's a good idea in terms of RF isolation and potential equipment damage.

I'm no expert in this area but I know this list is a wealth of expert opinion, 
so here's my question:


I want to buy a two position coaxial switch.  I want to connect ONE antenna to 
it and switch this antenna between a KX2/KXPA100 (100 watts) and a KX1 (about 3 
watts). The coax cable coming from this switch to the KX2 is a short piece of 
RG8X and the coax cable going from this switch to the KX1 is 25' of RG-174 
(yes, I already computed the dB loss and I can live with).


Am I likely to cause any damage to to either piece of equipment?


Thanks,
Stan WB2LQF



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Re: [Elecraft] {OT} - Variation on use of a coaxial switch

[stan levandowski]

Thank you, Don. An Alpha Delta has that isolation. I thought it would be 
OK but as a hobbyist and not a pro, I don't know what I don't know. 
 Happy New Year.

Stan WB2LQF


On Fri, Dec 30, 2016 at 06:44 PM, Don Wilhelm wrote:


Stan,

If your maximum power is 100 watts and the isolation of the switch is 
40dB or more then I don't think you have any problem.


73,
Don W3FPR

On 12/30/2016 5:49 PM, stan levandowski wrote:
I would like to use a coaxial switch for an unintended use and I'm 
not

sure if it's a good idea in terms of RF isolation and potential
equipment damage.

I'm no expert in this area but I know this list is a wealth of expert
opinion, so here's my question:


I want to buy a two position coaxial switch.  I want to connect ONE
antenna to it and switch this antenna between a KX2/KXPA100 (100 
watts)

and a KX1 (about 3 watts).  The coax cable coming from this switch to
the KX2 is a short piece of RG8X and the coax cable going from this
switch to the KX1 is 25' of RG-174 (yes, I already computed the dB 
loss

and I can live with).


Am I likely to cause any damage to to either piece of equipment?


Thanks,
Stan WB2LQF



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Re: [Elecraft] Please do a KPA1500

[Charlie T, K3ICH]

I can tell you, I have a lot of 50 MHz DX in the log that a home brew 4CX-1000A 
made possible.

Unlike HF DXing, some six meter ES & F2 openings last only a few minutes, and 
the early bird + big amp, gets the proverbial worm.

I am definitely NOT opposed to running high power.

My only piece of logic is that if you're going to go to the trouble and expense 
of running an amp, go for legal limit.
Agreed, SS legal limit amps are pricey, but a legal limit tube amp is much 
easier on the radio budget.

Yeah, I know 500 watts will help, but as we all agree, 1500 will do it when 500 
won't.

73, Charlie k3ICH

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of N2TK, Tony
Sent: Friday, December 30, 2016 6:39 PM
To: 'Mike va3mw' 
Cc: 'Elecraft Mail List' 
Subject: Re: [Elecraft] Please do a KPA1500

During mediocre conditions there has been more than once on 80 and 160M the DX 
could not quite get my call correct with the KPA500. Once the Acom 2000A timed 
out they had no trouble copying my call. Most of the time I operate the K3 
barefoot. When I need more oomph I turn on the KPA500. If conditions are not 
good I turn on the Acom. There are times the difference between 600W and 1500W 
can make the difference between a QSO and no QSO. It would be nice to have a 
1500W S-S amp in the basement alongside the KPA500. Any amp I would buy needs 
to be able to be controlled remotely like the KPA500 and the Acom. The only 
real advantage to me switching from a tube to a solid-state amp would be the 
timeout thing. During a contest and when a DXpedition is going, then I just 
leave the Acom on. No big thing letting it sit there idling.

73 and HNY
N2TK, Tony 



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Re: [Elecraft] {OT} - Variation on use of a coaxial switch

[Ron D'Eau Claire]

The difference between a hobbyist (Amateur) and a "pro" is that the pro gets 
paid to find out what he doesn't know. 

73, Ron AC7AC

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of stan 
levandowski
Sent: Friday, December 30, 2016 3:53 PM
To: donw...@embarqmail.com
Cc: Elecraft@mailman.qth.net
Subject: Re: [Elecraft] {OT} - Variation on use of a coaxial switch

Thank you, Don. An Alpha Delta has that isolation. I thought it would be OK but 
as a hobbyist and not a pro, I don't know what I don't know. 
 Happy New Year.
Stan WB2LQF

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Re: [Elecraft] {OT} - Variation on use of a coaxial switch

[Don Wilhelm]

Ron and all,

I would differ from that a little bit.  The difference between the 
amateur and the pro is that the pro knows how to conceal his mistakes.

Take it from a former woodworking pro.

I don't know how that transfers to electronics, a dead semiconductor 
device is difficult to to conceal.


73,
Don W3FPR

On 12/30/2016 7:29 PM, Ron D'Eau Claire wrote:

The difference between a hobbyist (Amateur) and a "pro" is that the pro gets 
paid to find out what he doesn't know.

73, Ron AC7AC

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of stan 
levandowski
Sent: Friday, December 30, 2016 3:53 PM
To: donw...@embarqmail.com
Cc: Elecraft@mailman.qth.net
Subject: Re: [Elecraft] {OT} - Variation on use of a coaxial switch

Thank you, Don. An Alpha Delta has that isolation. I thought it would be OK but 
as a hobbyist and not a pro, I don't know what I don't know.
 Happy New Year.
Stan WB2LQF

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Re: [Elecraft] {OT} - Variation on use of a coaxial switch

[Fred Jensen]

T-shirt the other day:

MECHANIC

Curious enough to take it apart

Professional enough to put it back together

Smart enough to hide the extra parts

73,

Fred K6DGW
Sparks NV USA
Washoe County DM09dn

On 12/30/2016 4:59 PM, Don Wilhelm wrote:

Ron and all,

I would differ from that a little bit.  The difference between the
amateur and the pro is that the pro knows how to conceal his mistakes.
Take it from a former woodworking pro.

I don't know how that transfers to electronics, a dead semiconductor
device is difficult to to conceal.

73,
Don W3FPR


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Re: [Elecraft] [KX3] USB sound card functionality in the future?

[Nr4c]

Since the radio is not really that modular I'd not hold my breath. The K3 had 
several boards that made up the KIO3 module. 

Sent from my iPhone
...nr4c. bill


> On Dec 30, 2016, at 3:54 PM, Dave Hartzell  wrote:
> 
> I'm not sure what the upgrade and refresh cycle is for the KX3, but I'm
> wondering if there will ever be KIO3-like capability added to the KX3 (or
> KX2).
> 
> Mainly so the radio shows up as a sound card over the USB...
> 
> Dave
> ad0qe
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[Elecraft] Please do a KPA1500 [but not for me]

[Dauer, Edward]

I wouldn't buy a 1.5 KW amp either, but for a different reason. Although I have 
a modern 220 volt drop to the house with ample capability,  I do not have 220 
volt service to the spare bedroom that I use for my shack.  The KPA500  draws 
about as much current as I think it safe to run, given the 117 VAC wiring in 
that room.  Before I bought the KPA500 I looked at the now-defunct Tokyo 
HyPower 1.2 KW amp, consulted with a professional electrician about what it 
would cost to run a 220 volt line into the shack, and decided against it.  I 
suspect that 500 or 600 watts is a "sweet spot" in the market, given that at 
least some potential buyers would face the same issue I did.  That makes the 
cost - not the price - of a 1.5 KW amp fairly steep.  From a microeconomic 
perspective, I'll bet there's a knee in the demand curve somewhere over 500 
watts and somewhere under 1 KW, the point at which a different AC service 
becomes necessary if not just prudent.  That knee describes the probable
  behavior of buyers and therefore a higher step in the market challenge for 
sellers.

Ted, KN1CBR

--

Message: 22
Date: Fri, 30 Dec 2016 13:57:49 -0700
From: Ken G Kopp 
To: Guy Olinger K2AV , elecraft@mailman.qth.net
Subject: Re: [Elecraft] Please do a KPA1500
Message-ID:

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

I have no interest in a 1 or 1.5 KW Amp.

Guy (K2AV) sums it up nicely.

73!

Ken Kopp - K0PP

**
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Re: [Elecraft] {OT} - Variation on use of a coaxial switch

[Nr4c]

Note that many antenna switches short the in-used antenna to ground so you 
would be shorting the output of the in-selected radio to ground.  NOT a good 
idea. 

MFJ makes a switch that connects 2 radios to 3 antennas. Flip the switch and 
the antennas are switched to the other radio. Put a dummy load on unused 
antenna and you are set. I'm not sure of the model number but it's in their 
catalog. 

Sent from my iPhone
...nr4c. bill


> On Dec 30, 2016, at 5:49 PM, stan levandowski  wrote:
> 
> I would like to use a coaxial switch for an unintended use and I'm not sure 
> if it's a good idea in terms of RF isolation and potential equipment damage.
> 
> I'm no expert in this area but I know this list is a wealth of expert 
> opinion, so here's my question:
> 
> 
> I want to buy a two position coaxial switch.  I want to connect ONE antenna 
> to it and switch this antenna between a KX2/KXPA100 (100 watts) and a KX1 
> (about 3 watts).  The coax cable coming from this switch to the KX2 is a 
> short piece of RG8X and the coax cable going from this switch to the KX1 is 
> 25' of RG-174 (yes, I already computed the dB loss and I can live with). 
> 
> 
> Am I likely to cause any damage to to either piece of equipment?
> 
> 
> Thanks,
> Stan WB2LQF
> 
> 
> 
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Re: [Elecraft] {OT} - Variation on use of a coaxial switch

[stan levandowski]

Why not a good idea??   The unselected radio is "off" so wouldn't a 
grounded antenna connection on the unselected radio actually be a good 
idea?  Stan.


On Fri, Dec 30, 2016 at 08:53 PM, Nr4c wrote:

Note that many antenna switches short the in-used antenna to ground so 
you would be shorting the output of the in-selected radio to ground. 
NOT a good idea.
MFJ makes a switch that connects 2 radios to 3 antennas. Flip the 
switch and the antennas are switched to the other radio. Put a dummy 
load on unused antenna and you are set. I'm not sure of the model 
number but it's in their catalog.

Sent from my iPhone
...nr4c. bill



On Dec 30, 2016, at 5:49 PM, stan levandowski  wrote:

I would like to use a coaxial switch for an unintended use and I'm 
not sure if it's a good idea in terms of RF isolation and potential 
equipment damage.


I'm no expert in this area but I know this list is a wealth of expert 
opinion, so here's my question:



I want to buy a two position coaxial switch.  I want to connect ONE 
antenna to it and switch this antenna between a KX2/KXPA100 (100 
watts) and a KX1 (about 3 watts).  The coax cable coming from this 
switch to the KX2 is a short piece of RG8X and the coax cable going 
from this switch to the KX1 is 25' of RG-174 (yes, I already computed 
the dB loss and I can live with).


Am I likely to cause any damage to to either piece of equipment?


Thanks,
Stan WB2LQF



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Re: [Elecraft] {OT} - Variation on use of a coaxial switch

[Jim Brown]

That may be one difference. But having been a pro who got paid for 
giving advice about things that matter to a client, what being a pro has 
always meant to was to make sure that I was


1) Never giving advice you were not certain of; and
2) Always ready to say "I don't know, but I'll find out;" and
3) Always ready to say "Not within my expertise, let's ask xxx:" and
4) Always ready to hire xxx to get the right answer if I was contracted 
to do it, or if the client was willing to pay for it.


73, Jim K9YC

On Fri,12/30/2016 4:59 PM, Don Wilhelm wrote:
I would differ from that a little bit.  The difference between the 
amateur and the pro is that the pro knows how to conceal his mistakes.
Take it from a former woodworking pro. 



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Re: [Elecraft] Please do a KPA1500

[Ignacy]

With a little work, KPA500 can be a KW amp while losing weight. This is by
using LDMOS and a commercial PS. But then KAT500 would have to be beefed up
to KAT1000. 

I have Expert 1.3k that I use with KX3 for > 1 KW. The Expert is 21 lbs
(lighter than Elecraft) with a 3:1 tuner + 4 antenna switch and automatic
110/220V switching; KPA500/KAT500 would be 35 lbs + cables. Also without
dealers markup, the no-ATU version is not that much expensive than KPA500.
But the Expert needs Elecraft refinement. 

One KW is great when working portable as DX. Everybody responds even with
impromptu antennas.

Ignacy, NO9E



--
View this message in context: 
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Sent from the Elecraft mailing list archive at Nabble.com.
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Re: [Elecraft] [Moon-Net] Elecraft transverter

[Seb]

You should know that DEMI can install (and probably sell as a kit for you to 
install) the ApolLo synthesizer board inside of Elecraft transverters.  I asked 
Steve at DEMI some time ago if it would be possible, and he asked me to send 
him my XV222 transverter.  Within a few days, I received it back and is now 
connected and locked to my external 10 MHz reference source.

Mine was the guinea pig and Steve mentioned that he would document its 
installation.  Even with Elecraft’s TCXO, its frequency was not stable enough 
for meteor scatter use.

73 de Sebastian, W4AS




> On Dec 30, 2016, at 4:30 PM, wa3...@atlanticbb.net wrote:
> 
> Tom, I also have a Elecraft 432 transverter. After working on it for a month 
> with Elecraf'ts help I could not get it stable enough for jt65. Elecraft 
> agreed I had got it as stable as it was going to be.It is ok for ssb and cw. 
> I am using DEMI transverters  on 144,222,432, 1296,2304,and 3456. The only 
> units with  10mahz reference are  2304 and 3456 which are dead on. I do not 
> think you are going to find many transceivers that go above 1296. With a 
> stable transceiver transverters are the way to go and cost effective for 
> multiple bands.   The 432 Elecraft is for sale. I  am keeping the 2m  
> Elecraft for backup in case of emergency during vhf contest. KUHNE makes 
> excellent  equipment but is out of my price reach. Tom got ur qsl today 
> return is on way tnx. gl paul, wa3qpx 
>   

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Re: [Elecraft] 4Sale: Loaded K3s

[Carl Jón Denbow]

SOLD!

Sent from my iPhone
===
Carl Jón Denbow, N8VZ
17 Coventry Lane
Athens, Ohio 45701-3718
 
c...@n8vz.com
www.n8vz.com
EM89wh
 
IRLP 4533   Echolink 116070
 
PSK and JT65 Forever!
===

> On Dec 20, 2016, at 8:30 PM, Carl Jón Denbow  wrote:
> 
> Here you go:
> 
> As a result of a swap, I have ended up with three K3-line rigs. I'm going to 
> sell one. The rig for sale is a K3s originally purchased on 9/8/2015. It has 
> just returned from Elecraft where it was factory aligned and checked out and, 
> according to the Elecraft Repair Report, now "meets or exceeds all factory 
> specfications." This rig is loaded. It includes the following:
> KPA3A-F 100W Upgrade 
> KAT3A-F ATU
> KTCX03-1-F K3 TCXO
> KFL3A-2.8 2.8 KHz Filter
> KFL3A-6K-IR-F K3 6 KHz 8 pole filter
> KFL3B-FM-IR-F FM-bandwith filter
> KBPF3A General Coverage RX
> KRX3A-K K3 2nd RX Modular Kit
> K144XV-K 2M Module
> Bought new, with all of these modules, the rig costs $4879.50. I will sell 
> for $4200.00, including shipping to your QTH in the Continental United 
> States. PayPal Only. The rig is still in the box which Elecraft used to 
> return it to me.  I will take the invoice out, add the manual and sent it to 
> the buyer.
> 
>> Dean L Tuesday, December 20, 2016 7:30 PM
>> Carl
>> Seems like a lot of work!
>> You went through the effort  of cross posting it, tell us more about the k3s 
>> here. 
>> 73
>> Dean K2WW 
>> 
> 
> -- 
> == 
> Carl Jón Denbow, N8VZ 
> Athens, Ohio 45701-3718 
> 
> c...@n8vz.com 
> http://www.n8vz.com 
> EM89wh IRLP 4533 Echolink 116070 
> 
> PSK and JT65 Forever! 
> ==
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