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Re: #ubitx-help #ubitx-help

 

That is good news, I would look at one of the trifilar interstage transformer being shorted.
I mentioned the numbers earlier.

If the transformers are fine then a dry solder in the RX chain or filter would be the culprit.
A DC voltage check on RX BiDi amps would confirm they are OK or not.
A general check to know if a 3904 is blown (very unlikely) is voltage across Base and emitter.
It should be around 0.6-0.7v.
If you get no voltage then check if that stage is getting Rx 12v. Also unlikely in this case.

I will bet on the trifilars as for now!

Raj

At 04/06/2018, you wrote:
Thanks Raj, I will look on that! But now a little more info: I looked up a very strong broadcast station at 13.580 on my little transistor radio (with a small telescopic antenna) and I could hear on it my ubitx! But very weak..
Could it be an idea to order some 2N3904 and start replacing?
H?kan
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