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FIXED IT! RE: New K3 build, LOW LOW sensitivity.

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joemoffatt

FIXED IT! RE: New K3 build, LOW LOW sensitivity.

I found it! I went back and saw a bent pin on the KXV3 and took those boards including IO out and reseated and all is well!

Thanks!

Joe

From: Elecraft [mailto:[hidden email]] On Behalf Of W0MU Mike Fatchett
Sent: Sunday, March 1, 2015 4:52 PM
To: [hidden email]
Subject: Re: [Elecraft] New K3 build, LOW LOW sensitivity.

Check all the coaxial cables that plug into the boards and front panel.
Make sure they go the right places. I would also check the way you have
decided to handle the coax going to the coax chassis connector SO239.
There are a couple of ways to do this depending on your options.

Mike W0MU

On 3/1/2015 3:45 PM, Joe Moffatt wrote:

> Ok, checked the RX ANT switch. It was not on. I did connect an antenna to the RX ANT jack and switched to it, but no difference.
>
> Not sure what is wrong where. In any case, there is very little sensitivity in the K3 at this point.
>
> Don't know what to check. I have gone back through the best I can... seems everything was done correctly.
>
> Very careful about ESD.
>
> Joe
>
>
>
> From: Wayne Burdick [mailto:[hidden email]]
> Sent: Sunday, March 1, 2015 12:38 PM
> To: Joe Moffatt
> Cc: [hidden email]<mailto:[hidden email]>
> Subject: Re: [Elecraft] New K3 build, LOW LOW sensitivity.
>
> Joe,
>
> Do you have a KXV3 module installed? You may be switched to the RX antenna.
>
> Wayne
> N6KR
>
> On Mar 1, 2015, at 7:48 AM, joemoffatt <[hidden email]><mailto:[hidden email]%3e><mailto:[hidden email]%3e><mailto:[hidden email]%3e%3e> wrote:
>
>> Everything in the manual checked out ok. I am at the stage before putting in
>> the 100 watt PA. Just checking things out. I have the IF Out board, but
>> that's about it. No ATU. Setup filters, etc. But, I have only about S1
>> on the S Meter, and can only weakly hear the strongest of signals. Even WWV
>> is poor. This is on a known good antenna/coax.
>>
>> Anyhow, just wondering what to check. I haven't set the REF OSC yet because
>> I can't get a strong enough signal to do it.
>>
>> Ideas? I thought I was sailing along smoothly.
>>
>> Thanks,
>>
>> joe
>>
>>
>>
>>
>>
>> --
>> View this message in context: http://elecraft.365791.n2.nabble.com/New-K3-build-LOW-LOW-sensitivity-tp7599593.html
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Phil Wheeler-2

Re: FIXED IT! RE: New K3 build, LOW LOW sensitivity.

Good! Always good to hear a happy ending, Joe :-)

Phil W7OX

On 3/1/15 4:05 PM, Joe Moffatt wrote:

> I found it! I went back and saw a bent pin on the KXV3 and took those boards including IO out and reseated and all is well!
>
> Thanks!
>
> Joe
>
>
>
> From: Elecraft [mailto:[hidden email]] On Behalf Of W0MU Mike Fatchett
> Sent: Sunday, March 1, 2015 4:52 PM
> To: [hidden email]
> Subject: Re: [Elecraft] New K3 build, LOW LOW sensitivity.
>
> Check all the coaxial cables that plug into the boards and front panel.
> Make sure they go the right places. I would also check the way you have
> decided to handle the coax going to the coax chassis connector SO239.
> There are a couple of ways to do this depending on your options.
>
> Mike W0MU
>
> On 3/1/2015 3:45 PM, Joe Moffatt wrote:
>> Ok, checked the RX ANT switch. It was not on. I did connect an antenna to the RX ANT jack and switched to it, but no difference.
>>
>> Not sure what is wrong where. In any case, there is very little sensitivity in the K3 at this point.
>>
>> Don't know what to check. I have gone back through the best I can... seems everything was done correctly.
>>
>> Very careful about ESD.
>>
>> Joe
>>
>>
>>
>> From: Wayne Burdick [mailto:[hidden email]]
>> Sent: Sunday, March 1, 2015 12:38 PM
>> To: Joe Moffatt
>> Cc: [hidden email]<mailto:[hidden email]>
>> Subject: Re: [Elecraft] New K3 build, LOW LOW sensitivity.
>>
>> Joe,
>>
>> Do you have a KXV3 module installed? You may be switched to the RX antenna.
>>
>> Wayne
>> N6KR
>>
>> On Mar 1, 2015, at 7:48 AM, joemoffatt <[hidden email]><mailto:[hidden email]%3e><mailto:[hidden email]%3e><mailto:[hidden email]%3e%3e> wrote:
>>
>>> Everything in the manual checked out ok. I am at the stage before putting in
>>> the 100 watt PA. Just checking things out. I have the IF Out board, but
>>> that's about it. No ATU. Setup filters, etc. But, I have only about S1
>>> on the S Meter, and can only weakly hear the strongest of signals. Even WWV
>>> is poor. This is on a known good antenna/coax.
>>>
>>> Anyhow, just wondering what to check. I haven't set the REF OSC yet because
>>> I can't get a strong enough signal to do it.
>>>
>>> Ideas? I thought I was sailing along smoothly.
>>>
>>> Thanks,
>>>
>>> joe

gm3sek

Re: FIXED IT! RE: New K3 build, LOW LOW sensitivity.

In reply to this post by joemoffatt

>
>I found it! I went back and saw a bent pin on the KXV3 and took those
>boards including IO out and reseated and all is well!
>

Congratulations, Joe! You now *own* your K3 in a special way that the
factory-built model can never offer.

One of the things we do when building a K3 is to 'train' all the
connector pins to mate more easily with each other. We also train
ourselves, so it really does become easier next time.

This applies especially to the front panel because there are so many
connector pins. I'd hate to think that anyone has assembled the front
panel once but has then declared "Never again!" Next time, it will
genuinely be MUCH easier.

73 from Ian GM3SEK

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