Dick,
The normal resistance is very high (receive periods) and very close to
zero during transmit (or TUNE).
Your 15 ohms is unusual.
Check the gate voltage of Q9 - it should be close to 5 volts. Also
check the soldering of Q9. Be ceertain the source connection has had
enough heat to flow the solder out onto both the solder pad and the Q9 lead.
73,
Don W3FPR
richard gilley wrote:
Just finished the KPA100. Page 49 External Amp Keying test. Getting
15 ohms during Tune.
Tried two meters. R1 and C90 look OK.
Ideas?
Best regards
AD1G
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