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  1. 73's de Edd

    In need of help with AC motor!

    Sir nameuser . . . . . Usually you don't see anything coming from a dry electrolytic unit like that, unless they explode. Usually, failure analysis reveals just a time related gradual drop in capacitance to the state where it can no longer provide its start up boost. That motor is being of...
  2. 73's de Edd

    Automated Teller machine (ATM) controller board troubleshooting.

    Sir Seun . . . . . WOWeeeee . . . . .do you have your hands full on that one. YOU KNOW what the product IS and DOES so don’t expect any techno info being readily available. (Also do not hide a FREE PAY button on a wiring exit.) I see that your only hope might be for the unit having a power...
  3. 73's de Edd

    (Russian) 1978 Radio's audio signal path from cassette deck

    Sir Richard9025 . . . . . base to collector 794mV base to emmiter 800mV Those confirm good junctions on a PNP silicon transistor Now what are the actual voltages readings on the transistor, with their readings C 4,9VDC B 5,7 VDC E 6,2VDC The all critical emitter bypass cap you have...
  4. 73's de Edd

    Series or parallel fans for max cooling ?

    Sir FuZZ1L0G1C To differentiate as to whether the time related fault is basically related to transformer OR control electronics. Assuming that is not your only “toy” in the shop, try taking a 10 gallon or greater air source and reduce the regulators air output down to 30-40 lbs. and put on...
  5. 73's de Edd

    LG Flatron E2742V-BN, need help identifying Voltage regulator

    Sir Gavin Winning . . . . Pin2 read(s) 19.18V, If that is true your external power block is seeming to be good and installed with proper poalarity. Pin7 read 4.61V, That is because that same 19VDC input voltage is being passed thru a 100K resistor and drops down to that value, as it is then...
  6. 73's de Edd

    5 decade old battery pack bridge

    Steve . . . in absentia . . sez. . . " twee" places.. . . to the left.
  7. 73's de Edd

    (Russian) 1978 Radio's audio signal path from cassette deck

    R8 is connected to the emitter of the transistor and then goes over to to connect into R13 and R20 . That emitter bypass capacitor, will be tied into those three connections somewhere. 73's de Edd
  8. 73's de Edd

    LG Flatron E2742V-BN, need help identifying Voltage regulator

    Sir Gavin Winning . . . . . ¿ WHASSAMATTAHYOU ? I had no trouble in making out the APW7302Bee. . . . particularly the AP and the 02Bee. Check roadmap . . . .Da-Da sheet below, and use DVM in low ohms function to see if pin 2-3 or 3-4 are shorted. The 19VDC power brick might be bad ( PLUS...
  9. 73's de Edd

    Radiomobile 501t vintage radio

    No the ground is the other shell / shield connection . . .NOT 12V.
  10. 73's de Edd

    5 decade old battery pack bridge

    Sir Theodore . . . . . . . Can you hear me . . . . CAN YOU HEAR ME NOW ? . . .are you " IN" today ? Believe me . . . those-es-es-es diodes are NOT being any of the 1N295 or 1N60 germanium family, so don't even think of them. The best comparison diode made in that SMALL GLASS CASING, back...
  11. 73's de Edd

    (Russian) 1978 Radio's audio signal path from cassette deck

    Sir Richard9025 . . . . . How do the voltages check out on the VT1 C-B-E’s . The resistors are carbon film so they should be quite stable, but check R5- R4-R9, also that C4 electrolytic used as the emitter bypass to ground (Velly-velly important ). That’s it, other than the VT1...
  12. 73's de Edd

    Radiomobile 501t vintage radio

    Sir Trevor Baillie . . . . . Well how ‘bout that . . . in my mind’s eye I was fully expecting a JAG-WAR . . . . . BENTLEY . . . .’59 Gull wing Mercy-Days or a Rolling Royster, so you didn’t come up below my expectations. . . . if this was to be an auction item. It’s worthy of a Radiomobile...
  13. 73's de Edd

    Radiomobile 501t vintage radio

    No, might just as well eliminate that prior driver circuitry and pull that transistor and take out audio from its base connection circuits pair of resistors thru an isolating cap..
  14. 73's de Edd

    Radiomobile 501t vintage radio

    Sir Trevor Baillie . . . . . If you have none of the original power output amplifier. Would you be up to putting in a load resistor for completing the collector circuitry of that TR1 driver transistor that originally fed a driver transformer within that now missing power amp ciruitry. That...
  15. 73's de Edd

    (Russian) 1978 Radio's audio signal path from cassette deck

    Only have couple of silly milliseconds at this time . . . . . But in your GREEN box / and /or PINK box assignments looks like the most likely candidates would be the switch contacts of 1-2-3 and the separate 7-8-9 at the switch just below it. With them being related to power switching...
  16. 73's de Edd

    Quiz buzzer system

    Mme Belle . . . . . Or you could have the box held down by all of the fingers of each hand, holding around the side of each respective side of the case for stability and using a thumb or crossed thumbs to then press on the pushbutton. The pushbutton is being mounted at center front of the side...
  17. 73's de Edd

    A radio from 1920 goes to 2017 !

    Considering the derived chosen cramped space limitations of that radio housing, I feel that he would probably be tickled pink with the results that are seen being attained there . . . .avec . . . .stereo. A.G. . . . . Just had the neighbor kid come in to help me compute, and I pulled off my...
  18. 73's de Edd

    A radio from 1920 goes to 2017 !

    Confucius say . . . . . . .
  19. 73's de Edd

    (Russian) 1978 Radio's audio signal path from cassette deck

    Sir Richard9025 . . . . . Check out the supplied referencing and note that the bottom section is being a schema clip of the radio band switching. On that A3 board, the pressing of the yKB . . .Tape . . .has the RED connection opened between the 14 and 16 switching contacts. The wiring from...
  20. 73's de Edd

    Help identifying film capacitor on old amp board

    Sir Michael Kiggins . . . . . In those passing 17 years, looks like Siemens has almost, if not totally dropped out of that family of capacitor. Seems like Panasonic has the industry favor now, with you wanting to use their RF and Microwave polypropylene version instead of the conventional...
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