Re: [Elecraft] Info 080 message started with RF Alignment and Test, Part II

[Vic K2VCO]

Try resoldering the connections to the MCU socket. Look at connections with a 
magnifier, 
and heat and add a bit of solder to any that look grainy or otherwise not good.

The fact that it worked partially and then stopped working suggests a flaky 
solder joint 
rather than a wiring mistake!

On 10/24/2012 9:10 PM, AC8HU wrote:
> Hi all -
>
> Started build of my K2 a few weeks back and have been slowly progressing.  I
> must say I'm not an overly experienced builder - I've built a number of
> smaller kits, the largest being an MFJ shortwave regen receiver and one of
> the "Ice Tube" clocks you can find online - but all of my builds thus far
> have ended with success.  Through Part 1 of the RF board tests, all was
> well.  Upon reaching the part 2 tests, things appeared to be fine as well (4
> MHz Oscillator Calibration checked out ok, and PLL Reference Oscillator
> Range Test was fine as well).  However when I proceded to the VCO Test, the
> problems started - with the first appearance of the Info 080 message.  I've
> had no luck in fixing the problem since.  Here's what I've found/checked:
>
> 1.)  X2 on the control board is the proper crystal - I was able to hear it
> on another receiver and zero-beat it by adjusting C22
> 2.)  Resistance between pin 28, U1 (RF board) and pin 40, U6 (control board)
> is 197 to 198 ohms - well below the 900 to 1000 it should be
> 3.)  Voltage on pin 28 of U1 (RF) is 0.14 V (close to 0, certainly nowhere
> near the 5-6 V range) - this apparently indicates that U1 is not programmed
> AND that the Aux Bus is open, although I've had no luck figuring out where
> the problem is with the Aux Bus
> 4.)  Checked voltage on pin 32 of the MCU (U6, control board) and found it
> to be exactly 5 V - checks haven't indicated any problems with the MCU I can
> find
> 5.)  I currently have no relay sound at startup.  I did previously (even
> with the first few startups of the Part 2 tests) however sometime after
> these problems started, the relay activity stopped.
> 6.)  Checking pins 1 and 20 of U1 on the RF board both give me 6 V
> 7.)  Measuring pin 28 of U1 to ground with power off gives me a high
> resistance value
>
> I attempted a "456" reset as I've seen mentioned elsewhere - this seemed to
> do no good as following the 10 seconds of Info 201 message, instead of the
> "Elecraft" message, I got the Info 080 message again.  Pressing any button
> to continue past that results in a display of 0.00 and what looks like
> part of the number 2, NOT the c to indicate CW mode.  I assume this is a
> result of U1 not properly communicating with U6 at this point.
>
> Any suggestions?  At this point I'm fairly certain I have a fried (or
> "unprogrammed") U1, but I suspect I've got some other problem as well.  (I
> have been using an anti-static mat and wrist strap while building, however
> my soldering iron itself isn't grounded and perhaps should be.)  I'm quite
> the novice in terms of electronics so I can't really interpret the numbers
> I'm seeing other than to compare them to the baselines and see where things
> aren't correct.  Not totally discouraged at this point, but definitely
> distressed...
>
> Thanks in advance for your help!
>
>
>
> --
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-- 
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco/

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Re: [Elecraft] K2: High SWR On Dummy Load

[Vic K2VCO]

You probably have thought of this, but make sure you are using a different 
cable to the 
dummy load than the one you were using with the antenna. Bad cables, or rather, 
bad 
cable-connector junctions, are very common.

On 10/24/2012 7:18 PM, Ariel Jacala wrote:
> My. K2/100 is acting up in that it is showing high SWR even on a dummy load.  
> Any ideas on whether the K2 finals may be blown? It behaves the same way on 
> all the bands.  It displays high current with the power set to 3 watts or 
> more.  My K2 is SN7105.
>
> Will appreciate diagnostic help.
>
> Ariel NY4G
>
> Sent from my iPad
>

-- 
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco/

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[Elecraft] Info 080 message started with RF Alignment and Test, Part II

[AC8HU]

Hi all -

Started build of my K2 a few weeks back and have been slowly progressing.  I
must say I'm not an overly experienced builder - I've built a number of
smaller kits, the largest being an MFJ shortwave regen receiver and one of
the "Ice Tube" clocks you can find online - but all of my builds thus far
have ended with success.  Through Part 1 of the RF board tests, all was
well.  Upon reaching the part 2 tests, things appeared to be fine as well (4
MHz Oscillator Calibration checked out ok, and PLL Reference Oscillator
Range Test was fine as well).  However when I proceded to the VCO Test, the
problems started - with the first appearance of the Info 080 message.  I've
had no luck in fixing the problem since.  Here's what I've found/checked:

1.)  X2 on the control board is the proper crystal - I was able to hear it
on another receiver and zero-beat it by adjusting C22
2.)  Resistance between pin 28, U1 (RF board) and pin 40, U6 (control board)
is 197 to 198 ohms - well below the 900 to 1000 it should be
3.)  Voltage on pin 28 of U1 (RF) is 0.14 V (close to 0, certainly nowhere
near the 5-6 V range) - this apparently indicates that U1 is not programmed
AND that the Aux Bus is open, although I've had no luck figuring out where
the problem is with the Aux Bus
4.)  Checked voltage on pin 32 of the MCU (U6, control board) and found it
to be exactly 5 V - checks haven't indicated any problems with the MCU I can
find
5.)  I currently have no relay sound at startup.  I did previously (even
with the first few startups of the Part 2 tests) however sometime after
these problems started, the relay activity stopped.
6.)  Checking pins 1 and 20 of U1 on the RF board both give me 6 V
7.)  Measuring pin 28 of U1 to ground with power off gives me a high
resistance value

I attempted a "456" reset as I've seen mentioned elsewhere - this seemed to
do no good as following the 10 seconds of Info 201 message, instead of the
"Elecraft" message, I got the Info 080 message again.  Pressing any button
to continue past that results in a display of 0.00 and what looks like
part of the number 2, NOT the c to indicate CW mode.  I assume this is a
result of U1 not properly communicating with U6 at this point.

Any suggestions?  At this point I'm fairly certain I have a fried (or
"unprogrammed") U1, but I suspect I've got some other problem as well.  (I
have been using an anti-static mat and wrist strap while building, however
my soldering iron itself isn't grounded and perhaps should be.)  I'm quite
the novice in terms of electronics so I can't really interpret the numbers
I'm seeing other than to compare them to the baselines and see where things
aren't correct.  Not totally discouraged at this point, but definitely
distressed...

Thanks in advance for your help!



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Re: [Elecraft] KX3 using CW key as PTT switch for voice

[Helmut Mayrhofer]

Yes, agreed too!
Helmut OE1MHL

via iPad

Am 25.10.2012 um 03:04 schrieb "Bruce Beford" :

> Agreed. -Bruce, N1RX
> 
>> More interesting will be to implement the "send CW from SSB mode" 
>> (CW WGHT = SSB +CW) as described in the owner's manual.
> 
>> 73, Matt VK2ACL
> 
> 
> 
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Re: [Elecraft] K2: High SWR On Dummy Load

[Jim Wiley]

Ariel -

What options, if any,  are in your K2?   Can you temporarily disable the 
100-watt PA and connect the 10-watt PA directly to the dummy load 
(disconnecting the cables to the KPA-100 completely), and if so, what 
happens then?  It may be that the wattmeter diodes are damaged.  If that 
happens the power control circuit cannot operate properly and all sorts 
of odd things may happen.


- Jim, KL7CC


On 10/24/2012 6:18 PM, Ariel Jacala wrote:
> My. K2/100 is acting up in that it is showing high SWR even on a dummy load.  
> Any ideas on whether the K2 finals may be blown? It behaves the same way on 
> all the bands.  It displays high current with the power set to 3 watts or 
> more.  My K2 is SN7105.
>
> Will appreciate diagnostic help.
>
> Ariel NY4G
>
> Sent from my iPad
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[Elecraft] K2: High SWR On Dummy Load

[Ariel Jacala]

My. K2/100 is acting up in that it is showing high SWR even on a dummy load.  
Any ideas on whether the K2 finals may be blown? It behaves the same way on all 
the bands.  It displays high current with the power set to 3 watts or more.  My 
K2 is SN7105.

Will appreciate diagnostic help.

Ariel NY4G

Sent from my iPad
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Re: [Elecraft] 2m Transverter

[kp4md]

When tuned to 144-146 MHz per Elecraft instructions, the XV144 transverter
will also operate in the 146-148 MHz and nearby MARS frequencies although
with decreased sensitivity and output power.  These findings are posted on 
http://www.qsl.net/kp4md/xv144.htm   
K7MDL wrote
> Realize the XV144 (external transverter) is spec'd for 144 to 146MHz. Also
> running FM it is recommended you run at lower power than the max 20W. 
> Most FM repeaters in the US are 145-147.999.  May be different
> elsewhere.The internal transverter K144XV also works in 2MHz bands and
> switches the LO to move between 144 and 146 segments.





-
Carol, KP4MD/W6
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Re: [Elecraft] KX3 using CW key as PTT switch for voice

[Bruce Beford]

Agreed. -Bruce, N1RX

> More interesting will be to implement the "send CW from SSB mode" 
> (CW WGHT = SSB +CW) as described in the owner's manual.

> 73, Matt VK2ACL



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Re: [Elecraft] K2 #7375 Beginning construction!

[N8CEP]

The control board for K2 #7375 is complete. The front panel board is finished
but not yet in the metal front panel. Getting a little tired tonight and I
don't want to scratch the front panel or do anything dumb like that! So I
think thats enough for now. Back to it tomorrow!
Keith N8CEP



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Re: [Elecraft] KX3 using CW key as PTT switch for voice

[Matt Maguire VK2ACL]

On 25/10/2012, at 1:45 AM, Wayne Burdick  wrote:

> I'll add "key as PTT" to the wish-list.

More interesting will be to implement the "send CW from SSB mode" (CW WGHT = 
SSB +CW) as described in the owner's manual.

73, Matt VK2ACL
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[Elecraft] K3- hearing 10-11m above 44 MHz

[mic]

Hi,
I'm hearing, for example, K6FRC/B2 beacon on both 28.250 MHz and 44.676 MHz
First IF 8.125 Second IF 15 KHz my math is not working.
Also hearing some very strange call signs up there :)
Anyone else hear it with AGC off pre amp on?
Or is it just my receiver
Thank you,
73 ka5pnx



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[Elecraft] K3: For Sale

[W4ATK]

Item 1:
Elecraft K3/100 s/n 4671
Installed options:
KAT3 – Auto-tuner
KRX3 – Sub Receiver
KXV3A – IF out and transverter interface
KBPF3 – General coverage RX module
Filters:
Main:
KFL3A-2.8k 8 pole
KFL3A-1.0k 8 pole
KFL3A-400 8 pole
Sub:
KFL3A-2.8k 8 pole

Item 2:
Elecraft P3 – Panadapter s/n 644
P3 – SVGA video adapter, FFT processor

Condition of both items is excellent with no issues. Non smoking environment.
All manuals and documentation included. All power cables are set up for 
PowerPole connections
If interested contact me off list.  Please, only serious inquiries. Photos 
available upon request. 

73, Jim, W4ATK
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Re: [Elecraft] K3 and AMP

[Dave Hachadorian]

In the past, I have used an SB-220, which has +120 VDC on the 
relay keying line.  No problem.


Dave Hachadorian, K6LL
Yuma, Arizona








































. 
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Re: [Elecraft] K3 and AMP

[Jim Brown]

On 10/24/2012 7:34 AM, Robert 'RC' Conley wrote:
> I wish to purchase an Amp either new (or new to me ) to use with my K3/100

I've successfully used K3s, both at home and other places, with KPA500, 
Ten Tec Titan 425 (original, 30+ years old), Ten Tec Hercules II (a bit 
newer), Alpha 87, and ACOM 1000.  No issues that I'm aware of with any 
of these amps.

73, Jim K9YC
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Re: [Elecraft] K3 and AMP

[Joe Subich, W4TV]

 > Maybe. If you get a very old amp you may have difficulties with the
 > keying circuit. More knowledgable people then I am will need to help
 > you with that.

Heath SB-200, SB-220, (and variants), Yaesu FL1200 (and variants),
Drake L4, and Kenwood TS-922 are all issues due to either negative
relay controls, AC relay controls or a high current spike on relay
opening.

The smart thing to do is to measure the relay line on any amp you
might suspect - if the key up voltage is negative, AC or < +24V
you will need a buffer or will need to add a "soft key" circuit to
the amplifier.  Also measure the relay current with the amp keyed
as you will not want to see more than about 100ma to prevent issues
with inductive kick on relay release.

73,

... Joe, W4TV


On 10/24/2012 11:13 AM, Gary Smith wrote:
> RC,
>
> Maybe. If you get a very old amp you may have difficulties with the
> keying circuit. More knowledgable people then I am will need to help
> you with that. You'll only know that when you investigate the
> specific amp. Not all older amps are an issue; I have a 30 year old
> Alpha 77SX and run directly from the K3 key out to the Alpha's "Relay
> in" and it works great. (I'd asked here regarding any specific
> interface problems before buying this specific amp)
>
> If you use CW and like QSK, you'll want that to be a factor in your
> amp and get an amp with QSK. If not, it won't much matter except a
> QSK relaying system will always be quieter than the non-QSK versions.
> You might not like a loud click when you transmit or it may not
> bother you in the least, that's your call.
>
> 73,
>
> Gary
> KA1J
>
>> I wish to purchase an Amp either new (or new to me ) to use with my K3/100.
>> Are there any that I should avoid and will I need interfacing circuitry
>> Thanks RC kc5wa
>>
>> --
>> "ETERNAL VIGILANCE" is the price of FREEDOM.Thomas Jefferson
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>
>
>
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[Elecraft] K2/10 and accessories for sale

[Joseph Trombino, Jr]

Howdy Gang:

Since I now primarily use my K3 and KX3 I have decided to sell my K2/10.

The K2 was built by me and is s/n 4118 so no mods required.  It is in overall 
excellent condition.

The K2/10 includes the following options:

KAT2
KSB2
KAF2
KBT2 (with battery only several months old)
K160RX (built but not installed)
FDIMP

New from Elecraft would be $1236.00 (and you have to put it together---grin)

The K2 works FB and had been my mainstay QRP rig until I got a K3.

Will include a spare K2 top and unopened bottle of Elecraft touch up paint for 
those "oops" moments.

Will ship and insure the K2/10 and options for $850. 

Preferred payment method is U.S. Postal Money Order or PayPal (please add %3.5).

73, Joe W2KJ
I QRP, therefore I am
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[Elecraft] P3 Anomoly

[Jim Miller]

I'm finding my P3 is doing something new and unpleasant. It keeps dropping
it's senstivity after a few minutes. The noise level is visible normally
above a -140db threshold on most bands but right now I need to move the REF
LVL to -160 to show noise on 20m. If I turn it off and on again the noise
level sensitivity goes back to 140ish as it should.

I've not figured out what triggers this behavior.

Anyone else?

FWIW, setup is K3/P3/KPA500 (currently in standby). K3 in Test mode.

jim
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Re: [Elecraft] K3 and AMP

[Gary Smith]

RC,

Maybe. If you get a very old amp you may have difficulties with the 
keying circuit. More knowledgable people then I am will need to help 
you with that. You'll only know that when you investigate the 
specific amp. Not all older amps are an issue; I have a 30 year old 
Alpha 77SX and run directly from the K3 key out to the Alpha's "Relay 
in" and it works great. (I'd asked here regarding any specific 
interface problems before buying this specific amp)

If you use CW and like QSK, you'll want that to be a factor in your 
amp and get an amp with QSK. If not, it won't much matter except a 
QSK relaying system will always be quieter than the non-QSK versions. 
You might not like a loud click when you transmit or it may not 
bother you in the least, that's your call. 

73,

Gary
KA1J

> I wish to purchase an Amp either new (or new to me ) to use with my K3/100.
> Are there any that I should avoid and will I need interfacing circuitry
> Thanks RC kc5wa
> 
> -- 
> "ETERNAL VIGILANCE" is the price of FREEDOM.Thomas Jefferson
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> 



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Re: [Elecraft] K3 and AMP

[Fred Smith]

Well I have 2 different amps for my 2 K3's and both work very well. It
depends on how much power you want for a 500w amp I love the Elecraft KPA500
it integrates with the K3 like a glove. All you have to do is QSY on the
radio and the amp follows with it every time and it's the same size as the
K3 and it weighs 26#. I was able to purchase mine pre-owned only 6 mo old
for a very good price from a wanted to buy ad on QTH.COM. It has worked
flawless and looks like new not a blemish, so they can be found used. This
amp works as well as my Yaesu VL-1000 did with my FTDX-5000MP in this case a
500w radio the K3 but no tuner.

For my other K3 and a Legal Limit++ amp I use an Alpha 87A Auto Tune amp.
All you do with it is attach the coax and the key out line from the radio to
amp your done it loaf's at 1500w key down any mode for however long you need
it to.

Only amps I would avoid...MFJ's!!

73,
Fred/N0AZZ

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Robert 'RC' Conley
Sent: Wednesday, October 24, 2012 9:34 AM
To: Elecraft@mailman.qth.net
Subject: [Elecraft] K3 and AMP

I wish to purchase an Amp either new (or new to me ) to use with my K3/100.
Are there any that I should avoid and will I need interfacing circuitry
Thanks RC kc5wa

--
"ETERNAL VIGILANCE" is the price of FREEDOM.Thomas Jefferson
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Re: [Elecraft] KX3 using CW key as PTT switch for voice

[Wayne Burdick]

> I'm curious: Would it be possible to add a software feature to allow  
> the
> use of a key as a PTT switch?  It seems rather strange to have the key
> toggle TX/RX in CW mode just fine, but to lock out that function in  
> all
> other modes except for CW.  As the KX3 is very small and compact, it
> would be an advantage to minimize the cables, and maximize the  
> functions
> available through existing accessories.  Allowing a single key to be
> used for both CW and PTT would make a lot of sense.

No one ever asked :)  Usually, operators who manually activate PTT  
either tap the XMIT switch or use a foot-switch plugged into ACC2.

I'll add "key as PTT" to the wish-list.

73,
Wayne
N6KR


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[Elecraft] FS: GW Instek SFG-2110 Function/Signal Generator - Price reduced

[Craig Smith]

I have for sale my GW Instek SFG-2110 10 MHz synthesized function generator. I 
purchased it new in 2007 and it has since seen light use in my non-smoking lab. 
Closing down lab in preparation for a move, so time to let it go. It is in 
absolutely mint condition and functions perfectly.

This is a very versatile unit providing sine, square, triangle wave outputs at 
frequencies up to 10 MHz over a wide amplitude range. Amplitude and frequency 
modulation as well as sweep generator capabilities. Built-in frequency counter 
with operation up to 150 MHz. For complete specifications, see the Instek 
website.

Your purchase includes the calibration certificate as well as the original 
manual, documentation and Instek box. 

Price is $250. Insured ground UPS shipping to the lower 48 will be from $18 to 
$26 depending on your distance from Colorado. Provide your zip and I will let 
you know the shipping charge. PayPal only, please.

If interested, please contact me directly via email: craig (at) powersmith 
(dot) net

73 Craig AC0DS






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Re: [Elecraft] KX3 using CW key as PTT switch for voice

[Josh Lehan]

On 10/21/2012 08:05 AM, Wayne Burdick wrote:
> You can use the tip contact of the ACC2 jack as a PTT input. Set
> MENU:ACC2 IO to "LO=PTT".
> 
> You can plug your key directly into the ACC2 jack if it has a 2.5-mm
> stereo plug. If not, you'll need an adapter like the one supplied as
> part of our KX3 accessory cable kit.

Thank you for the response!

If I were to use a Y-cable, that plugged into both KEY and ACC2 (ACC2
via 3.5mm-to-2.5mm adapter), would this work?  My key is only a straight
key, but for some reason, it has a stereo (not mono) 3.5mm plug.

I'm curious: Would it be possible to add a software feature to allow the
use of a key as a PTT switch?  It seems rather strange to have the key
toggle TX/RX in CW mode just fine, but to lock out that function in all
other modes except for CW.  As the KX3 is very small and compact, it
would be an advantage to minimize the cables, and maximize the functions
available through existing accessories.  Allowing a single key to be
used for both CW and PTT would make a lot of sense.

Thank you!

I'm glad you have an accessory cable kit available.  Finding good 3.5mm
to 2.5mm adapters that actually work seems to be unusually difficult.
Most of them are made for cellular headsets (4-pin), not stereo
headphones (3-pin).  I realize that space was limited on the KX3 to use
standard 3.5mm cables everywhere, but it's still a disappointment to not
have standardized on a single cable size.

Josh
K6JSH (formerly KJ6PVN)
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