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  1. 73's de Edd

    Is transistor faulty or something else amiss

    It's for sure that, the one used for the oscillator portion is going to be an IMMENSE 10 improvement over the SWAN's . . . . . Slinky / Mickey M...O...U...S...E coil being utilized. Both in the respect of mechanical solidity, frequency stability and minimizing any mechanical vibrations...
  2. 73's de Edd

    20-yr Old Tamarack Attic Fan - Troubleshooting Crouzet Synchronous Motor, Etc.

    ACH HIMMEL . . . . . .Icht bin der attticfanman ! . . . . . Back when you submitted the initial pics of the lift mechanism for the door, it appeared to have two like rods being side by side. Now, your latest photo totally clarifys that situation. Now, one sees a length of 1/4 in metal bar...
  3. 73's de Edd

    Repairing an old radiation detector.

    Sir Lupus_Vulpes . . . . . Looking at the otherwise QUALITY build of that unit, I don't even see how those two common E-caps even got into the unit. Not knowing what you have available as parts suppliers, I will use one that is commonly found Eurowise. You would be wanting one of the basic...
  4. 73's de Edd

    Yamaha Aventage RX-A810 perfect but no audio

    What happens when you place it in tuner mode and try to listen for audio thru HEADPHONES . . . . any audio then ?
  5. 73's de Edd

    Help with a circuit.

    Le Tominator . . . . . You say . . . I shall now explain why I have so many switches. The circuit with the RED LED is what I am building now. Basically, the Red LED is a pilot light to show whether the voltage is on or not at the switch. You may have noticed a larger switch next to it. This...
  6. 73's de Edd

    Machine Tool Repair

    Le Machine Docteur . . . . HOLY . . .GUACAMOLE ! . . . . . . aren't you "Whacking that mole " (4022) quite HARD in the respect of hitting it with a full 24V logic level, into it. Also, I don't see any good logic housekeeping, in the respect of sweeping its different I.C.'s Vcc power supply...
  7. 73's de Edd

    Help with a circuit.

    Will do . . . but as ANNIE says . . . . . . . tomorrow . . . .tomorrow . . . .
  8. 73's de Edd

    Repairing an old radiation detector.

    DANGER ALERT . . . . .DANGER ALERT ! I saw that you had the units GREY thermistor pulled and I NEED to warn you that it must be handled like a . . .? . . .? . . . . like a . . . .soap bubble. It is being formed as a slug / disc with its polymorphous metallic amalgam, with it additionally ...
  9. 73's de Edd

    IR2153D

    Sir Cirkit . . . . . It certainly appears that you need to see EXACTLY what circuitry is being upon that daughter board, as just one component might be remoted and therefore inhibit the daughter board from being able to initiate a " run by itself " pulse outputting capability. Also, since you...
  10. 73's de Edd

    Repairing an old radiation detector.

    Sir Lupus_Vulpes . . . . . I just took a quick look at components and the units schematic and relevant design, and the most glaring thing I see is the units 1980'ish vintage and the units use of GERMANIUM transistors in the power supply . . . .in the schematics top left corner. BUT ! at...
  11. 73's de Edd

    Machine Tool Repair

    Sir Machine Doctor 13 . . . . . You say . . . . . The outputs from the 2981A are + 15 V too but I need to convert them to + 24 V for the CNC control board inputs. I don't know if you already have found a 2981A . . . . from old stock, but that chip will accept +24VDC (on upwards, to just...
  12. 73's de Edd

    5 Transistors Linear Triangle Wave Generator

    Had it TRULY been "discreet" you would not have published it for everyone to see. Additionally, you would be amazed by the number of people who would not know the output take off points of the triangle AND square waves.
  13. 73's de Edd

    Help with a circuit.

    But . . .but . . .BUT . . . .BUT . . . BUT . . . Key sw on, Rot pos 1. The voltmeter and green led are in series to pole A. Way 1 being negative. Way 2 when through toggle switch puts the red led in series with the voltmeter and green led and back to negative connected to Way 1. So in pos...
  14. 73's de Edd

    Help with a circuit.

    Sir The_Tominator . . . . . . . . . . ( Is that you . . . . Ahhhhhhhhhhhh-nold ? . . . . . . because if it was Toiminator, I just know it wud be ) So in looking at your intermixing 4 conditions of switch positions being shown, here is what is being accomplished, by the very bottom wiring...
  15. 73's de Edd

    Need Help Identifying SMD component (gone missing) on Samsung Tablet

    Audio contraire . . . . . additionally Hand fabricate an aluminum foil heat shield, with the required cut out window. ( Audio= what you get with a hair trigger sensitivity Spell Check . . . . Vice . . .Au ) On your cap, you see a like physical size just below to the left mounted in a hoz...
  16. 73's de Edd

    Yamaha Aventage RX-A810 does not turn on

    Sir JPfx . . . . . " Mah fren " . . . and you are my friend . . . . you do realize that you have yourself , one overall COMMMM - PLEXXXXX piece of equipment there . . . do you not ? Along with all of the hollow feelings, in the pit of your stomach, when u see its schematics and...
  17. 73's de Edd

    Yamaha Aventage RX-A810 does not turn on

    Sir JPfx . . . . . Looks like you need to confirm that F3702 and PARTICULARLY that F3701 are good. If so, then apply AC power and test to see if there is being 5VDC at my RED arrow mark up. If so, then confirm if the BLUE marked 3.3VDC and 5VDC supplies are also present . RE . . . . query...
  18. 73's de Edd

    Treadmill control board check and repair

    " My treadmill ". . . . . . . . Now we have ONLY 26 known BRANDS and a combined 32 different YEARS of their being manufactured and their combined 11,648 different MODELS. And here I am, additionally worrying about where I am going to ask someone to help me identify what PART I need to to...
  19. 73's de Edd

    20-yr Old Tamarack Attic Fan - Troubleshooting Crouzet Synchronous Motor, Etc.

    Sir atticfanman . . . . . A CONTINUANCE . . . . . . . . . . I can't see all that I REALLY need to see, nor can I actually put my hands on it and make it go whiz-bang-whir r r r r . Harvesting what I can see, with your " Crouton " motor having only a white and blue power wire, this is...
  20. 73's de Edd

    20-yr Old Tamarack Attic Fan - Troubleshooting Crouzet Synchronous Motor, Etc.

    Sir atticfanman . . . . . THOROUGH initial info + GOOD photo coverage. So it looks like the problem is the units shutter / door driver motor. I see the white and blue power wires . . . . .I also looked and saw no associative capacitor being used, for this unit. I saw a "GLORIFIED" clock...
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