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  1. 73's de Edd

    n-mosfet replacement on Qnix lcd monitor

    . Sir AMT . . . . . . I had marked up the board with all of the parts in its portion that is being associated with its on board power supply section and you are apparently experiencing a failure with. The two things that I did not mark up are at the left center side of the board and...
  2. 73's de Edd

    Monitor Auto Spark in Cab

    . Sir dw85745 . . . . . . I also done that about a "hundred" years ago on a brand new 1954 Corvette. It was basically just an eye candy piece of instrumentation, being placed under the dash for ambient light shielding, but angled upwards to be readily visible. Its case was a round orange...
  3. 73's de Edd

    Bose Acoustic Wave System II No LCD Display

    . Sir mlilpovitch. . . . . Well hecks . . . .and I thought that I "dun gud" with just having your initial "car" and "Mercedes" info to work with, without further telling us the model and year and more exacting specifics. If your system is not using the deluxe " Panaplexed " display...
  4. 73's de Edd

    Amplifier Repair - electrolytic capacitors expose metal top?

    looxuser . . . . . . . . . Finally . . . .able to get back to your problem. AMAZING . . . . to have a few bits of ancillary instrumentation . . . .I usually have to instruct in "Mac Guyver" types of workarounds, much in the order of very sneaky utilizations of Scotch tape, toothpicks and...
  5. 73's de Edd

    Bose Acoustic Wave System II No LCD Display

    Sir mlipovitch . . . . . Having 6 units of that Sound Wave lineage being in our family, and starting with my unit being number one back in circa 2000, maybe I can reverse engineer some of their circuitry info for you. Let me start with the connector to the " Panaplex" display and have you...
  6. 73's de Edd

    Hack Basement Watchdog Water Alarm

    Sir "back"porch . . . . . Sooooooooo it looks like you just might have "warred" that transistor in "back" wards. That 12 VDC relays lower pull in spec is iffy, so try the 9 V battery and ohm out its relay contacts to see if it is reliably switching at that low level. It's for sure that it...
  7. 73's de Edd

    Hack Basement Watchdog Water Alarm

    Sir backporch . . . . . The last part number you have given is probably a TMP 36 and is a temp sensor IC, in what you might think is a transistor, due to its TO-92 casing.. Either the PN2222 or P2N2222 are proper parts UNLESS you made a mistake on its collector-base- emitter connections...
  8. 73's de Edd

    help in fixing national panasonic stereo model RX - F80 - 2

    . Sir pharaon . . . . . . On the last statement . . . . I am reading . . . . 73's de Edd said: ↑ If none is found, then move the first probe to the place where the RED battery connector wire is currently soldered onto the PCB, and use the other probe to test for a connection between it and...
  9. 73's de Edd

    Help! Transistor radio converted into amp

    . Sires . . . . Vel it looks like ve vill be awaitinks to see vat radio dot she is havink . . . . . I'm expecting its 6 or 9 VDC supply, stored in its 220 ufd filter cap(s) to only be "whacking" my errant screwdriver or test probe tip. 73's de Edd .
  10. 73's de Edd

    What battery?

    . Sir Steve . . . . . AaaaaaHaaaaa . .. with your forthcoming reference . . .looks like circa 66-67 vintage instrumentation. The pin assignment of the Eye See, as being related to board connectivity is not condicive of this unit being a ua709, but its forerunner a ua 702 from Fairchilds...
  11. 73's de Edd

    Help! Transistor radio converted into amp

    . Soulwyvern84 . . . . .so that makes you 32 ? Give us the brand and model number of your radio, so that we will then know what you are working with, and only then, maybe we can mark an X for you and thereby tell you where to dig . .73's de Edd
  12. 73's de Edd

    What battery?

    Also . . .go back in time and find all of the most popular ones, used in that era. http://www.alliedcatalogs.com/catalogs/1965-650/ 73's de Edd
  13. 73's de Edd

    What battery?

    . Sir Steve . . . . . . When I saw your Lafayette I was initially keying in on olde tyme Lafayette Radio, but with your dealing with GSR . . .Galvanic Skin Response / Resistance. This device must be of Lafayette Instruments . . . . . . . . polygraph fame. Are there any code dates on...
  14. 73's de Edd

    Hack Basement Watchdog Water Alarm

    Sir back porch . . . . . . . . . . . . . frontporch here . . . . . . . now, how comes we haven't run into each others before ? Working with your supplied info and seeing that you seem to be a rolled up sleeves kind of guy . . .. Here goes: That units design is really a gnats stomping his...
  15. 73's de Edd

    capacitor

    . Sir Adrian Polley . . . . . Here is a mo' bettah, big blow up of that same board , with the very hardest taxed capacitors tagged by RED DOTS. The next most likely are the ones associated with the controller circuitry, if acting squirrelly or having erratic turn on or shutdown, being...
  16. 73's de Edd

    help in fixing national panasonic stereo model RX - F80 - 2

    . Sir pharaon . . . . . . Great feedback, you are fine on that measurement, with what you have already done, the type of response that you are getting, is telling us that there is no very low value of resistance being between the + terminals of the three capacitors. Lets bet on capacitor A...
  17. 73's de Edd

    help in fixing national panasonic stereo model RX - F80 - 2

    MINOR CORRECTIONS . . . When you're ripping along at 100 wpm . . .mistakes occur, and you usually miss them on the first proof and sometimes even on the second . . . .with your old mind easily accepting : Aoccdrnig to a rscheearch at Cmabrigde Uinervtisy, it deosn't mttaer in waht oredr the...
  18. 73's de Edd

    help in fixing national panasonic stereo model RX - F80 - 2

    . Sir pharaon . . . . . . By your good photo of the top of the unit , we are seeing that the the Tape /Radio switch is being our switch of interest. And that seems to be " in the area" which you are currently hooked up to. AND . . . I might now assume that after a VERY close inspection of...
  19. 73's de Edd

    Hack Basement Watchdog Water Alarm

    Sir backporch . . . . . . If we do have to further analyze the board. You got answers . . .? . . . . . . .we gots questions. Top right corner, foil side of board, 9 VDC from batt comes in and initially gets a ceramic "cleansing" capacitor, along with power then passing on to what...
  20. 73's de Edd

    Help! Transistor radio converted into amp

    .Mme . .Soulwyvern84 Ahhhh yes . . . .Sir . . . OR . . . Madam . . .and we so infrequently, are visited by the fairer sex at this site. The only variant on your video was his going back one stage before the volume control to acquire a little of that required gain I had mentioned earlier...
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