Title: Another puzzler V6.3
Post by: WD8BXS on 25. December 2019, 13:24:25
Setting up a radio, 5 watts out all ok.
Full power out is strange,
increasing the drive past 5 watts and the power comes back down.
Scratching my head hihi
Merry Christmas to all!
Chuck |
Title: Re:Another puzzler V6.3
Post by: DF8OE on 26. December 2019, 09:03:49
Hi Chuck,
Merry Christmas to you and your family, too!
Regarding your TX problem: follow the signal using a scope. Start at the TX mixer output. Signal will start to cripple at some stage in TX chain. This can be many reasons: bad soldering, defective parts (semiconductor, inductor), wrong parts (wrong wound transformers, wrong inductor in BPF).
You must take a look at the signal...
vy 73
Andreas |
Title: Re:Another puzzler V6.3
Post by: WD8BXS on 28. December 2019, 14:11:42
Thanks Andreas,
Turned out to be faulty relay.
Relay would change state after a few seconds of powering the radio on.
A strange one!
Chuck |
Title: Re:Another puzzler V6.3
Post by: DF8OE on 28. December 2019, 14:44:57
I agree. But it is possible to locate even very strange things by logical approaches (best with digital answer possibilities yes/no). Now you can step forward until you reach the black hole where strange things happen ;D
Chuck - Good Luck for 2020!
vy 73
Andreas |
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