The same thing happened to me a few years ago and I used a 2n2222 non SMD.? It worked fine and I think it is still in there.
73, Pat AA4PG
Pat Griffin
http://www.cahabatechnology.com/aa4pg.html
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Bingo!
Raj, David and Jonas you are right! Q90 on my ubitx seems to be blown!
The multimeter shows about 230 ohm on the junctions. I did not yet check the voltages but I did this:
Using a short wire and two thin pins I just touched the Base of Q90 and the cursor of RV1, thus I bypassed Q90: then pressing the key some RF out from the PA immediately pop-up nicely!?
Thank you all my friends for the kind and smart expertize!
Now, to complete the job the matter is...: I do not have a 2N3904 SMD at hand. Should I order it online or install an ordinary 2N2222 (non SMD) instead?
Well... I do not urge to have the ubitx?working tonight, so it is certainly best to wait and do a proper job.?
In the meanwhile, just to fill the present boring days, I will play with a single-tube xtal transmitter 1938-style :-)
Let me add a comment:
This is the first time I asked for help on this Group and I have been delighted by the quick, very kind and smart response of so many friends that helped getting out of trouble.
Truly amazing.
Thank you all from my deep heart.
Best regards
Jep, IZ0WIT
