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Hi All,

Tried my uBitx v6 for the first time in a while the other morning.

Receive is as clear as ever? but TX has failed.

Output runs through a meter, so I can see some TX? power starts to head towards the antenna,? and is then choked.

First thoughts, relay, microphone switch (checked, and is ok), FETs?

Anyone experienced this?

Thanks as ever.

Best,
Nick

Have you tried CW mode to see if you have a carrier ?

Hi Nick,

As Roland suggests, start with CW to verify that the transmitter amp sections are working.? If there is no power out, I would begin with Q90 and do the voltage checks that are in the file from VU2ZAP on v4 voltages.? They apply to the v6 as good approximations.? They will let you know if you are in the ballpark.
/g/BITX20/files/VU2ZAP

73
Evan
AC9TU

Yes. Thanks. And no CW carrier, sadly.

Thanks Evan.
Sadly no CW carrier.
I will check Q90, and it does sound as though it may be the problem.
Much appreciated, as ever.
Best,
N