Subject: K2 Problem 30/20
K2 # 4869 fully functional except 30/20 meters.
An external signal generator on these bands will
allow trimmers C21 and C23 to be peaked. A
strong external signal is barely heard.
Items that have been checked:
#1 L18 , L19 , L20 rechecked for proper amount
of turns and solder joints Ok.
#2 All capacitors in the LP area are the correct part
and solder joints Ok.
#3 All capacitors in the band pass filter are the correct
parts and no solder joints.
#4 Relays K4 and K9 oriented correctly.
#5 Using Don's past words check solder joints and are Ok.
#6 The correct transformers used at L8 and L9.
#7 Trimmer caps with red dots are at C21 and C23.
Observations : Placing a finger under L8 increases noise levels
and touching a screwdriver to one end of most of the caps in
the 30/20 BP area also increase the noise level to a point where
strong outside signals can be heard.
Current plans are to use the signal generator at the antenna connector
and try to see where signal stops.
All other bands are good on Rx and Tx.
Any suggestions would be welcome.
Glenn
K5ZE
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