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  1. 73's de Edd

    Kustom double barrel guitar amp help

    Hey . . .Youse Guys . . . . . As per . . . . .Maybe the output device is shorted TDA7296 If that TDA7296 unit is bad one would expect the power outputs built within it to be bad. How about taking metering in hand and set it to ohmmeter function and at its lowest range . . . . unless your...
  2. 73's de Edd

    Tacx T2240 turbo trainer - blown resistor

    Sir stefhelm . . . . . The capacitors got all distorted and broke the plastic wheel ( interruptor) that spins around them . . . . . now, just exactly how do radial leaded E-capacitor cans get all physically / and / mechanically distorted ? ? ? ? Refer to the center hole and the 2:00 clock...
  3. 73's de Edd

    Hitachi KH-1190E radio stopped working

    That zener should be good then . . . . if you want to positiely nail it, just DC voltage monitor it while you use a 9V rectangular "radio" battery to feed its + terminal to a 1K resistor that has its other lead end going to the diodes cathode . . .banded end . . . . . of that zener. The meter...
  4. 73's de Edd

    Comedy Thread

  5. 73's de Edd

    B&D dh1245 bench grinder capacitor match problem

    Sir marcyb . . . . . Let's try out a bit more involved testing, SINCE you did menton of a proclivity of the motor, in attempting to try to turn, with a slight bit of hand assistance to its shaft. The motor starts with it then always rotating in ONE direction, and I hope that after AL L L L...
  6. 73's de Edd

    Hitachi KH-1190E radio stopped working

    Sir Martfoxy . . . . . O.K., then it looks like that the audio power output ic's are not bad and thereby not bleeding down the derived SUB power supply line of its needed voltage. So the . . .4.7 VDC . . . D5 zener regulating diode now smells most suspect. And if they are cramped for space...
  7. 73's de Edd

    Hitachi KH-1190E radio stopped working

    Both AM and FM are missing of any sound ? What is the voltage at both pin 1's of IC1 and IC2 Also the voltage reading across zener D5 ?
  8. 73's de Edd

    Need help with LDR circuit

    Sir fritzdecat . . . . . ( Not Felix . . .de . . .cat ? ) I thought it would be cool to have a couple of small 5mm UV leds inside clock to help make it visible. + paint some strontium aluminate pigment on the minute and hour hands. Should you want to do a "po" boy evaluation of that UV light...
  9. 73's de Edd

    Need help with LDR circuit

    Sir fritzdecat . . . . . I think that with a circuit talk thru, that you might then FULLY understand that circuit. I'm using Bertus- es- es- es # 10 posts picture Look at the extreme outer wiring loop that starts with the battery + to go up to the top and then turn right to go across to...
  10. 73's de Edd

    CNC computer controlled Hotwire heat problems

    Sir Foamworx . . . . . . . . . . . Looks like Cromas '84 design scheme . . . . . is STILL in use. I need better photo lighting and adjunct accompanying definition of the left half of the photo. NOW . . . From what I can seem to make out ? I see . . . . AC line power...
  11. 73's de Edd

    Replace IC 4049

    Its supposed to drive a variable synchrous motor . . . How about the specs from that motor as far as there being any marked fractional horsiepower or voltage and current comsumption.
  12. 73's de Edd

    Replace IC 4049

    Sir colum . . . . . What is this SUPPOSED to be ? . . . a mix? / mis? match of different circuits ? The right half, I can see as a 24Vcenter tapped power transformer, reverse installed, so as to then be getting 120 or 240 volts out from a hefty 12V battery. If being so, then at what...
  13. 73's de Edd

    Treadmill belt won't spin.

    Sir atcsharp . . . . . On your very 1st photo , I saw the 2 corner screws missing . . . . . . .and visualized your dismay in then seeing that the board would then not budge. NOT TO BE. After some further exploration you then discovered the need of mechanically decoupling from the heat sink...
  14. 73's de Edd

    Newbie question on 50 year old pottery wheel

    Sir budster . . . . . Your statement of . . . . The switch is a push-in-and-stay-in type i.e it hooks into something when you press it in and then unhooks when you press it again. Apologies again as I don't know the correct terms. That info nails the switch type PRECISELY, for us. Using the...
  15. 73's de Edd

    Newbie question on 50 year old pottery wheel

    Sir budster . . . . . . . . . . appears to date from the early 70s If you look at the black pot in the top corner and its 500 ohm ( unless that 4th symbol is not being an ohm symbol and is being another 0 ), then making it a 5000 ohm pot. BUT it is ALSO telling you that the pot was made the...
  16. 73's de Edd

    DC Motor stutter problem(not stepper)

    Reads like you covered all bases except possibly the REAL current needs at dead startup. Place clipped in DC voltage monitoring across the supply and then do a finger boosted chuck rotation during initi al start up and see if the voltage then pulls down excessively. Expecting it to then run ...
  17. 73's de Edd

    Newbie question on 50 year old pottery wheel

    Sir budster . . . . . Try this . . . on that power relay, as it will cost nothing to try. .In the most frontal foreground, you can see that those two contacts have nothing soldered to them, while your two AC power connections come in from the two looped in uber flexible braided wires with...
  18. 73's de Edd

    Texas Instruments Speak & Math freezing

    Sir bflo . . . . . . What I am seeing there is only two suspect parts, for what trouble you are experiencing. These are all being on the side mounted PC board . The least likely will be the BLUE tantalum drop E- capacitor and the most likely, the conventional radial leaded black E-capacitor...
  19. 73's de Edd

    Need help with commercial floor fan please

    Nick635csi . . . . . Ist photo . . . shows end of motor and a 6 finger phospor bronze spring retainer which is pressing against and holding centered . . . .a porous sintered bronze bushing . . . a la . . . Pickchur . . . . Surrounding that bushing is a giant THICK-THICK-THICK felt washer...
  20. 73's de Edd

    Need help with commercial floor fan please

    Sir Nick635csi . .. . . I have not yet taken an in depth reading of all of your info, just quickly scanned it , but if the 1st drawing of post # 8, yieded a hummmmmmmmmming motor and the GREY and WHITE wires are the only ones that are connected to just a single motor winding. Then just reverse...
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