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  1. 73's de Edd

    Scoreboard

    Using the original schematic which utilized the 555 in slowly putting out sequential pulses, that situation is related to automatically sequencing the counter through a count of up to 99. In that manner you can initially test out a counter unit. When you use the pushbutton wired into that 555...
  2. 73's de Edd

    Where would I hook up 2 speakers to this amp?

    Andrew9 . . . . . . . "Why 'soitanly " . . . . . .help is on its way . . . . as is being shown just below. You just need to initially confirm the " POWER AMP in a chip " number and confirm that is the same as my supplied data . . . .no extra charge for the A version, its just an upgrade. In...
  3. 73's de Edd

    help with schematic

    Check my personal conversation to you
  4. 73's de Edd

    List of CMOS digital devices, CD4xxx

    Sires . . . . . . . "They have come a long way BABY ! " Back in time . . . . . . . . I can remember the first RCA's only in CERAMIC packaging and anywhere from $6-26 per copy back in 1968-70. AND only in CD4000 thru 4006. 73's de Edd
  5. 73's de Edd

    Can you detect leaking batteries electronically?

    Sir Doug3004 . . . . . Two degrees of leaked battery electrolyte "goo" . . .the wet stage and the dried up dry residue stage. If the former . . .a possibility that some got down across PCB solder foil(s) and conductivity caused the effect. Being in a one in a 10,419 chance and in being...
  6. 73's de Edd

    Some questions about the PCB damage in my monitor

    Sir insincere_dave. . . . . . . .Could that board be slightly arcing over and starting a heated trail and you then detected the outgassing smell of phenol (We Amerikanskis recognize that scent associated with LYSOL ) as further heat up proceeds?. I can't see EXTREMELY well, ( on the...
  7. 73's de Edd

    Please identify the bulb.

    Sir Sanndeep. . . . . . . I also heartily agree on Sir Bluejets estimation of the type of bulb being utilized . . . . .it's a' looka like a' dis: Bi Pin Lamp: I only know of that lamp type being rated at up to 120VAC (Do note that THIS particular lamp set would be far above the...
  8. 73's de Edd

    PCB for Dishwasher repair

    Sir cjcharles . . . . . . . To see if you might possibly be able . . .TODOITTOIT. Take METERING . . . . . place on ohms mode . . . . . . short probes together to see its manner of display . . . . . then. Move probes to the "Tiny . . .switch mode in a box " I.C. and meter between pin 5...
  9. 73's de Edd

    Earphone Reinforcement Help

    Plus. . . . .if that plug is then going to be plugged into a big piece of equipment, it's just begging to be bumped into and be sheared off. To preclude that situation, insert an extension male to female extension line. Effectively, you are then having a longer version of what you initially...
  10. 73's de Edd

    Best way to get a replacement part for a switch?

    . Sir Rob Pearson . . . . . . . Using your last MAGIC info submitted . . . . .of . . .EMU Xboard 49 . . . . .did you realize that you totally left it off in the first post ? . . . . .I just initially searched and was floored when I saw ALL of the possibilities. . . .of 10 full pages of...
  11. 73's de Edd

    Earphone Reinforcement Help

    Sir Nick1212 . . . . . Seeing the originals treatment and the fact that SMALL / THIN housing PROBABLY / ASSUREDLY being ultrasonically FUSED together, precludes the using another another new plug, with factory attached strain relief, plus its new cable and HOPEFULLY the use of a LONGER...
  12. 73's de Edd

    LM4871 amplifier circuit not working, please help!

    Sir catalin123m . . . . . . . In your last submission . . . . . of your PCB layout . . . . .along with the mentioning of the chip running hot. How was your thermal cooling treatment of the DAP aspect of that chip. I don't even see that it is being incorporated. I include info, along with...
  13. 73's de Edd

    Sony Betamax SL-20 - will almost work, need help

    . . Sir Josh_dsl . . . . . Am I properly remembering from 32 years back ? I also, have either a SL 15 or 30 in my equipment archives . . . saved just in case I needed to play or dupe a Beta tape, or do an off the air capture of some FINE quality stored video . . . . to later transfer over...
  14. 73's de Edd

    Toroidal Transformer

    Sir Gatesheadkeith . . . . . . (Spell check is certainly questioning your name ! ) Saw all . . . . apprehended all . . . . and that is being a complete self contained unit with its own hefty power transformer. Its using power modules and a power output level that should suffice in all but a...
  15. 73's de Edd

    Scoreboard

    Sir Sean C . . . . . . . So . . . . . you got the planned schematics paperwork completed, along with an 80 grade point on it. Now you just have to make a working prototype. Which you seem to have done INITIALLY. Is your pulsing LED indicating there being a sequential timed "count" going...
  16. 73's de Edd

    Toroidal Transformer

    Wel l l l l l l . . . . . your further fill in on all of the details and seeing all of the activated displays have DEFINITELY set that toroid aspect aside. It now seems that you just might have an audio loss coming in from the RED arrow and the guestimated signal passage to the left, thru the...
  17. 73's de Edd

    Toroidal Transformer

    Sir Keith. . . . . . .et al . . . . . . Working only with the seen photos,, looks like a very clean unit . . .posssibly NEVER any problems, pristine looking toroid unit, the triple fuse bank has never had it's clear silicone seal broken. I wouldn't be overlooking a MUCH used power...
  18. 73's de Edd

    Best way to get a replacement part for a switch?

    Sir Rob Pearson . . . . . This is what has initially totally floored us . . .is the non specific: ." I bought a USB music keyboard ". . . . References out SPECIFICALLY as . . . . ...
  19. 73's de Edd

    50Hz sine wave

    ' 'ah likes that theres "bubba " cerkits !
  20. 73's de Edd

    ORB Super Eight 200 Subwoofer blows fuses

    Sir Rick 79 . . . . . MAN . . .'dat DO be QUICK supply chain action. Are you sure that none of the '530's were shorted S-D . . . .indicating that they failed initially and then overloaded these units in the power supply section and caused it to fail. Use a 100 watt incandescent lamp either...
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