K1 #2500 QRV... almost...

[Rich Smith-3]

Well. I just tested my 4-band K1, s/n 2500 on 30M and received a nice signal
report. :-)
 
:-(   But, I am having a problem with 20Meters. I am not able to hear a
signal at all on that band.  I did the ""Cheap and Dirty Signal Tracing for
the K1" having success with all of the test points except for numbers 4, 5,
& 6 which tells me that the problem must be in the KFL1-4 Premix Band-Pass
Filter section.  Anyone have an idea on what to try next to find the
problem??

Thanks
 
Richard, AB6TY
Paso Robles, CA
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[Rich Smith-3]

Thanks All that helped out ... I appreciate the assist!

I heard back from Tech support and they agreed that it is probably a bad 20M crystal, so they are sending me a new one.  After hearing that from them I wondered what would happen if I replaced the 20M with the unused 17M crystal, so I swapped em out and it now works on all 4 bands!!!!!!!! so it WAS the problem.  So now I just have to wait for the new Crystal and then I can finish off the kit.  I am one happy camper... This calls for a nice glass ( or 2) of some of Merlot

I hope this will help others in the future that may have the same experience.
73's
Rich, AB6TY
Paso Robles, CA
K1 # 2500
--------------------------------------------------------------
> So far I have been able to get 40, 30 and 15 working ok but I do not
> hear any signals on 20M.  I went through all of the test points of the
> Cheap & Dirty Signal Tracing list.  all points seemed to work except
> points 4, 5, & 6 on the list,
>
> *4) *Filt Board, junction C11/C12, output of Band 1 RF BPF.
>
> *5)* Filt Board, C13, inter-stage coupling RF BPF.
>
> *6)* Filt Board, junction C14/C15, input to Band1 RF BPF.
>
> I was able to hear a jump in signal noise on all of the other points.
> So I guess there is a problem in the Pre-Mixer area for 20M.  I went
> through and removed any excess solder and reheated each joint for all
> of the components. and I removed the Xtal to make sure there was not a
> solder to ground problem under the can and then resoldered the xtal
> back on the PCB.
>
> I was able to hear signals on 15M , and had QSO's on 30 & 40.
>
> Could it be a bad Xtal , relay switch. or C3 or C4 variable Caps???
>
> Rich, AB6TY

Rich Smith wrote

Well. I just tested my 4-band K1, s/n 2500 on 30M and received a nice signal
report. :-)
 
:-(   But, I am having a problem with 20Meters. I am not able to hear a
signal at all on that band.  I did the ""Cheap and Dirty Signal Tracing for
the K1" having success with all of the test points except for numbers 4, 5,
& 6 which tells me that the problem must be in the KFL1-4 Premix Band-Pass
Filter section.  Anyone have an idea on what to try next to find the
problem??

Thanks
 
Richard, AB6TY
Paso Robles, CA
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