[Elecraft] K1 Alive Sans 20 Meters Followup

[John J. Bahun]

Well......

After a very late night (3 AM) of studying the schematics and proving to
myself that the xtal was alive and well and the relays were fine, I
concluded that their had to be something going on with the Trimmer caps.....

I got your suggestion to rotate the caps 10-20 times and I first thought
that sounded kinda crazy - but - at this point after checking the trimmer
installations and finding no problems - what did I have to lose?

After rotating the trimmers a bunch of times - Whammo - Peaking was there
and now have a solid 5 watts on 20 meters!

Not sure exactly what was going on with the trimmers for sure - I did not
overheat them when I soldered them (I use a Haeko Temp controlled station) -
But - It works!

Any explanation on exactly what was going on with the trimmers?

Thanks again and now on to the ATU build!

73 - WB8UFA / 7


----- Original Message ----- 
From: "Tom Arntzen" <tom.arntzen at monet.no>
To: "John J. Bahun" <jbahun at earthlink.net>
Sent: Sunday, June 06, 2004 3:21 PM
Subject: Re: [Elecraft] K1 Alive Sans 20 Meters Followup


> Try spinning the caps 10-20 times and realign 20
> Tom LA1PHA
>
> ----- Original Message ----- 
> From: "John J. Bahun" <jbahun at earthlink.net>
> To: <    >
> Sent: Sunday, June 06, 2004 10:11 AM
> Subject: [Elecraft] K1 Alive Sans 20 Meters Followup
>
>
> Additional information after reading through the Elecraft Archives.....
>
> Item #1 was a silly operator error - When I finished off the Xmitter
> section - I accidentally switched the switch on the bottom of the RF
board -
> Dohhh!
>
> Item #2 is still a puzzler.....
>
> I have checked the Xtal - I am getting a nice signal out of it at about 22
> MHZ - so I am convinced the crystal is ok.  I statically checked all the
> relay contacts in 20 meter mode and all seems ok.
>
> I am getting nothing on Rcv and no drive on Xmt - That must be a clue - I
> guess I need to study the schematics a little more and try and figure out
> what is unique about 20 meters on the unit.
>
> Any one have any other ideas Please let me know!
>
> Thanks!
>
> JB - WB8UFA / 7
>
>
>
> Original Text Below.....
>
>
> K1 S/N 1883 is alive!
>
> I have the 4 band module built - my RF board is complete and the front
> panel.
>
> I have gone through the RX alignment and I just finished the Xmitter
section
> and I am getting good peaking on RF output.
>
> I have a couple of problems.....
>
> 1.  I am hearing a tone in the headphones all the time - Slightly above
the
> noise floor - The Tuning knob does not change the frequency of the tone-
It
> sounds like about 400-600 Hz (approx by ear).....
>
> 2.  My 20 meter band is dead - No Rx or Tx - All other bands are great - I
> built my board for 40 - 30 - 20 and 15 meters.  I have examined the filter
> board for obvious items (solder stuff etc.)  I have not done any
> troubleshooting yet.
>
> Anyone have any ideas on these items?
>
> I am really excited to get it on the air - All the other bands look pretty
> good - I cannot wait to hook it up to my inverted vee and give it a go but
I
> think I am gonna wait until I get these bugs worked out.
>
> Thanks to all!
>
> 73
>
> WB8UFA - JB
>
> John J. Bahun
> Senior Software Engineer
> 1286 West Crystalline Way
> Oro Valley AZ  85737
> (520)-219-9514 (Home)
> (520)-547-2584 (Work)
> (520)-349-8850 (Cell)
>
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