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  1. 73's de Edd

    Sherwood AM 7040

    Sir dire . . . That then points to either a power induced hum or a ground loop. I'm assuming the the CDP has a conventional AC line cord rather than a separate plug in line power wart . In that case you would have two AC line cords involved one on the CDP and another on the MAIN amp. Now I...
  2. 73's de Edd

    Morse code reader

    And then you technically evolve its development into something like this . . . . http://atmega32-avr.com/morse-code-interpreter-with-speech-synthesis-using-atmega32/ 73's de Edd . . .W5VR
  3. 73's de Edd

    Denon AVR-1912 E2/EA

    Sir Michael . . . . . If you refer to the Denon documents ADOBE assigned page # 129 it will list IC801's part number . . . .which is actually being a R2A15218FP integrated circuit . . . . and the assignment of its pin numbers , along with their names and descriptive function. Therefore . ...
  4. 73's de Edd

    Squawk Box

    Sir bigkim100 . . . . Why is it? . . . . .somehow I think that the associative electronics of that unit . . .is absolutely being no more sophisticated that the build being within a talking / musical greeting card. You just need to add in a progressively more appropriately powerful audio...
  5. 73's de Edd

    Electric Mower repair

    Sir 2Peter2 . . . . . By observation . . . I can only make these guesstimations. Soooooooo . . .those 9 wire leads only stick up there and are not connected ? Definite copper sulfate deposits near the far right end leads from the copper erosion. Those most possibly being test points for...
  6. 73's de Edd

    Denon AVR-1912 E2/EA

    Sir Michael . . . . . If you are audio inputting to IC 801 at its pins 75 and 76 via the GREEN arrows.. It all being in accordance to how you have your input switching set . . . that then addresses to the PURPLE outlined internal solid state switching matrix. You might then end up with that...
  7. 73's de Edd

    Sherwood AM 7040

    Sir dire . . .(straits ? ) The solder blob "switch contacts have been done correctly, and is thereby making the unit a variable input function but with it coincidingly, having a now dead set of fixed input connectors. Your hummmmmmmmmmmmmmmmmm "problem" should be with a ground loop or two...
  8. 73's de Edd

    1980 Soviet Radio Cassette amplifier problem.

    "jumping" the audio after the detection to C61 What was the volume level produced just above, since you were being without the AM post amplifier stage ? Looking back at the voltages, I see one area where we have too much DC voltage: That voltage is being related to the FM section IF amplifier...
  9. 73's de Edd

    Material Sensors

    You gonna be a filthy rich big time RE-CYCLING MAGNATE in India ? Differentiating between the metals is the easiest . . . .but the ABSOLUTE subtle variants in the last three , will probably be best served by CHEEEEEEEEEEEP labor with the eye evaluation . . . brain processing and final manual...
  10. 73's de Edd

    Samsung Syncmaster 740BF repair

    ESR Meter . . . . . You might check across the input probes internal connecting circuitry . . . . . .usually they have a set of back to back diodes installed there just for THAT protection of encountering a charged cap boo-boo. You might just find that one or both of those diodes changed to...
  11. 73's de Edd

    1980 Soviet Radio Cassette amplifier problem.

    With all of time that you have spent painstakingly testing all of the associated transistors and components in the audio stages, I don't think that the EXACT cause of the problem will be found. Loss of gain is the NORMAL, this condition of having excess gain, after the detector stages is an...
  12. 73's de Edd

    Samsung Syncmaster 740BF repair

    Herr bushmeister . . . . . Indeed . . .a Fairchild / ON FSDMO365 is being a " switch mode PS within a chip ". I would have expected that line rectifier capacitor to be the last cap suspected, with those 3 green ones to the left to be the most likely suspect. Seems like your Mantech is not...
  13. 73's de Edd

    Heat shrink as water insulator

    Room Temperature Vulcanizing / ation . . . . . . or in the chance that it doesn't work for you . . . . . .Return To Vendor by riding there on your Rugged Terrain Vehicle .
  14. 73's de Edd

    Help with GE boombox

    Sir Joseph beeeeeeeeeee Phase 2 . . . . . Of initial evaluative testing would be to get a pre recorded cassette tape and fast forward it and then fast rewind it for enough time to get the old dormant rubber / neoprene a bit warmed up and then chance a play to see HOW the tape player max...
  15. 73's de Edd

    Help with GE boombox

    Sir Joseph_beeeeeeeeeee . . . . Assuming that you are testing with AC power . . . have you tried battery operation to confirm that the units internal AC to DC power supply may have developed time deteriorated parts . . . .particularly the mentioned quirky images which could be caused by low...
  16. 73's de Edd

    Talking to my phone

    After you teach it a bit . . . .you should just be able to use comma , period . . . question mark and have it do your punctuation. When I do voice recognition, I have to speak VERY distinctly and very slowly, in order to get anywhere near the correct capture rate that you now seem to be...
  17. 73's de Edd

    1980 Soviet Radio Cassette amplifier problem.

    You need to get that pot value on down closer to that original collector load resistance. That should enhance the audio quality appreciably. I just thought that you were more likely to have a 5 K pot salvaged from your junque pile of salvaged / pulled parts.
  18. 73's de Edd

    Simple Metal Detector Circuit Keeps Beeping - Help

    Sires . . . . . In contributing a BIT of visual enhancement upon that proto breadboard board . . . . . . now you are able to be a much better examin - OR while it do be the examin - EE . . . .deah, Andy. This seems to be the closest unit to be compared to, that is using that selection of...
  19. 73's de Edd

    1980 Soviet Radio Cassette amplifier problem.

    Sir Richard9025 . . . . . Let's just see if the following info, can create in your " minds eye ", just exactly what is occuring in your audio output stage. ALL without the use of your non available oscillosope or even your then having the full experince in using one. Consider the use of...
  20. 73's de Edd

    Outlet got wet

    Marshall80 . . . . . . . Now, these pics look real. . . . .excepting my being able to zero in on the brick type and its mortar mix.. Looks like you are just having a conventional WHITE duplex outlet that some klutz then placed an IVORY faceplate on. A name brand Leviton could range in the...
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