Hello I'm still working on my R4B AGC problem...does Radio Shack have
a equivalent replacement for the commonly used 2N3394 by Drake
or someone on the list who has bought a large quantities of the 2N3394's that
they would sell me a few?
Best Holidays
Bill Marvin KB9IV__
Hi Group My name is Bill KB9IV. I'm having a heck of a time with my now
refurbish R4B .
After I replace most major caps and electrolytic I found the T8 Notch assembly
had a shorted cable to 145 VDC! I bought
a used T8 with cablesgreat success.
The R4B had now superb receive although
Hello Group I am near completion reworking my R4B. In the process I used the
manual resistance chart to validate all was OK before
powering the rig just to be safe.
During check out I found a Big Problem on the V3 pin 5, it was shorted to
ground ..140 VDC !! I used the divide and conque
Hello Group I have been working on my R4B that has Calibrator Buzz and
intermitent low audio Hum. All tubes are now good and the
SSB/Cw receive is very clean. I replaced the Bias Cap 8 uF no go. Any hints
Best 73
Bill KB9IVV___
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