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  1. 73's de Edd

    Trying to repair a circuit board for a rolling ball clock

    Sir Iguanaman . . . . . Megaditto's on K.E.'s comment. You GOTS ! to be some kind of FEWL! if you done gones and wint trubbleshewting with a wire jumper, to then be probing places on that circuit board ! *** If your unit is one of the units shown below, you are dealing with the further...
  2. 73's de Edd

    repair Tribest Sedona SD-P9000 dehydrator -- low DC voltage from power board: maybe rectifiers or caps?

    Sir .brush . . . . . In reviewing your last photos, seems like they are using two hermetically coated HEFTY 10K disc thermistors, they should be troublefree. The colorization of the heater coils reveal and suggest a Mean Time Between Failure lifespan of an additional 200 years . . . . ...
  3. 73's de Edd

    repair Tribest Sedona SD-P9000 dehydrator -- low DC voltage from power board: maybe rectifiers or caps?

    Thir .brush . . . . . . . . . ( Thats stee-range ? . . . . . I seem to have just typed in a lisp . . .th. ) Looking at the boards foil side, one will initially see three hot spots from heat level subjecture and accumulated time of use. They relate to the two rectifier diode sets and the two...
  4. 73's de Edd

    what mosfet to use for an induction heater

    Verdict . . . . . . . . . . . . .GUILTY . . . as charged . . . . . . . . . realistically, instead, expect 100-200 khz.
  5. 73's de Edd

    Working around garbled LCD display on a blood-pressure monitor

    Sir gk1089 . . . . . In examining photos 2 and 3 and it is seen that NO zebra strips are even being involved with THIS unit. It uses 28 strips of printed on carbon/ graphite ink onto a paper like sheet and extreme end connections are made with individual micro drops of the same...
  6. 73's de Edd

    treadmill motor over volts

    Sir grass . . . . . the speed sensor seems to be fine and in working order. ***************** Let's initially sort out some particular related board circuitry . . . Top right corner of component view side of the board are the electronics related to the incline motor and its two black relays...
  7. 73's de Edd

    Peavey xr-684

    Sir JohnDio . . . . . O.K. . . . . .so I go thru pages 12-28 of defined audio processing stages of the 684 unit . . . .. but with them giving NO trace of a power supply, until the last page where the base power seems to be coming from + and - 15 V supply lines. Where is tech / schema info...
  8. 73's de Edd

    what's this part?

    Sir genesis0856 . . . . . The tunable coils aged, masking tape markings suggest of it being the C octave board . . . C flat variable inductor . . .C sharp variable inductor . . .so ? . . . . are you also having about 6 other similar boards ? It's being VERRRRRRRY old vintage, and I'm...
  9. 73's de Edd

    Laptop Short causing weird symptoms

    Sir Posty07 . . . . . To err is human . . . . . . . and BOY ! ! ! . . . . . are you human ! The immediate area in which you are kadiddlewhomping around in, is being in the circuit domain of the . . . . . sub power supply . . . . e.g. JW5068 . . . . . Power Supply Circuit...
  10. 73's de Edd

    Advice on modifying LED light circuit

    Sir nate72 . . . . . .(are you really 72 YO . . .or only going on 50'ish ? ) Mark up Photo . . . . . . . and . . . . . Concept of Circuit Design . . . . . . as per my perception . . . ( Frame . . . . . 24 K gold foil flakes and Brazilian Rosewood . . . hand rubbed ) HOLY MACKERAL . . . ...
  11. 73's de Edd

    Wireless doorbell chime - no sound

    Sir Cirkitt . . . . . . .(Haven't I ogled your old IBM computer mainframe mini modular boards AVATAR logo once before ? ) All meaningless numbers ? How abouts some good photos of both board sides . . . so that an eventual mark up analysis and evaluation can then be derived . . . . . viz . ...
  12. 73's de Edd

    Comedy Thread

    Too small to make out . . . .What did they do ? Try to insert the little or big dipper ?
  13. 73's de Edd

    Comedy Thread

    Got a dog ? ? ?
  14. 73's de Edd

    Wanted: Motorola m7549 Transistor/voltage regulator

    Would you estimate the vintage of the equipment as being75-85 'ishl? . . . As that numbering is certainly more in line as being a date code of the 49th week of 1975 . And also when Motorola was Motorola and not ON Semiconductor.
  15. 73's de Edd

    Fishing bite alarm

    I will leave the pictures as I have no idea what a online editor or paint means.. Email me the photo(s) and I will prep it up and submit for you . . . . https://www.electronicspoint.com/forums/conversations/add?to=Bite+Alarm
  16. 73's de Edd

    A recommended free online schematic creator ????

    Why for is it 1-10-2-3-4-5-6-7-8-9 ? and the I.C. numbering after pin 5, should cross over and continue CCW as pins 6-10. Plus, who is your supplier if 10 pin I.C.'s ?
  17. 73's de Edd

    Purpose of This Transistor?

    Sir Micahsteeze . . . . . Indeed the S1-S4 are connections to the back lighting of the display, and apparently it requires TWO separate strips /sets , but I am surprised at the use of a somewhat lower 3.3V supply ? ? ? . It must require a LED color with a lower Vf . . .e.g. RED. One then...
  18. 73's de Edd

    LG OS 5020

    Sir PMS . . . . . (¿ Madame ? . . . . . . . ( Post MenstrualSyndrome ) But now I am facing a problem that the transformer T601 hv winding partially sparking. Can hear a arcing sound inside and some tmes a blue light can visible in dark. I have a coil winding machine. Can I...
  19. 73's de Edd

    Smoke machine using resistance wire

    If the "battery charger" was to be blamed, it must be one of those giant roll around units and might have hit the unit with too much voltage. Did the old nichrome wire then burn open at just one point ? Can you take the old nichrome wire . . . . . .considering that its now pulled and being in...
  20. 73's de Edd

    Faulty PIR

    Sir Scudo . . . . . Initially can you take some solvent and an acid / paste / horse hair bristle brush and clean all of that white particulate matter that is all around and in the vicinity of the 560 ohm and 1500 ohm resistors and the mini surface mount transistor . . . . . also get its...
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