Hi all,
I am trying to repair the son's K1 where the TX seems to be sick. (receiver
sounds hot and quite nice on both bands 40/20m)
I found several C0G caps around the cores on the module board burned as same
as K1 relay so I replaced them all after long time searching them on the
market (EU).
Petr,
The number of turns on T4 is not likely to make much of a difference,
but I recommend correcting it just the same.
However, it is an indicator that there may be other toroids in that K1
with an extra turn on them, so check all of them.
As for the transmit problem, it is only a guess f
Don,
many thanks for hints.
I will re-check all cores on RF board as same as on band module...
We got this K1 in "repair needs" state from friend and the receiver sounds
nice at the moment.
So I would like to finish the repairing of TX path which burned to builder
probably during alignment.
I wi
Don,
I checked other parts in TX section and it seems to be ok (refer to manual
2000 Rev. D). Just removed the 5th turn on secondary winding of T3.
Is there something else strange or danger which I should check in order to
avoid smoke during the test or even blowing the final please?
Many thank
Petr.
Turn that manual to Appendix E near the back. And on page 6 of that
Appendix, you will find Transmitter Signal Tracing.
Set up the K1 as instructed there, and no damage will be done.
Then make the measurements in the order listed. You will need an RF
probe. If you are using an oscill
Don,
many thanks.
Manual is printed now.
I am going to do it step by step accordingly during coming Easter holiday.
I will report then after...:)
73 Petr
-
73 - Petr, OK1RP
"Apple & Elecraft freak"
B:http://ok1rp.blogspot.com
MeWe: https://bit.ly/2HGPoDx
MeWe: https://bit.ly/2FmwvDt
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Se
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