[Drakelist] 2N3394 Transistor?

2009-11-28 Thread Bill & Becky Marvin
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__

[Drakelist] R4B Double Trouble

2009-11-17 Thread Bill & Becky Marvin
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

[Drakelist] R4B Shorted Mini Coax

2009-10-23 Thread Bill & Becky Marvin
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

[Drakelist] R4B Calibrator Buzz

2009-03-05 Thread Bill & Becky Marvin
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___ Drakelist mailing