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  1. 73's de Edd

    Antique radio repair

    Sir Chuck Navajo1219 . . . . . WOW ! . . . . . I just absolutely can't get any better referencing , than this, for you . Obtained from a Riders manual # 6 of circa 1935 vintage and being in pristine condition with these two pages never having been opened onto daylight in 83 yrs. Of course...
  2. 73's de Edd

    Newbie here need help

    Sir Sum ting Wong . . . . Amazed to see that you are still around . . . . . totally thought that we had lost you ! http://i1.ytimg.com/vi/4V8zkhfDGMw/maxresdefault.jpg Looks like that specified acoustical alarm circuit is additionally using an extra transistor to be able to adjust the volume...
  3. 73's de Edd

    Please help me... FM Bug transmitter

    Sir 1TheHope1 . . . . . Heck no, that is being the electronics board for that clock. The central, small silver cylinder is a crystal that oscillates at 32.768 cycles per second and that is digitally divided down by the black BLOB IC to end up with a 1 pulse per second drive voltage for...
  4. 73's de Edd

    Slayer exciter problems

    Acho que sim.
  5. 73's de Edd

    Slayer exciter problems

    A TIP41 has low gain . . . . .. but will take care of your low power capability of the 2222. The pair get the gain, with the TIP boosting your power handling capability.
  6. 73's de Edd

    1979 Kenwood Trio Tuner Bulb

    Usually one would expect to find s..e..v..e..r..a..l lamps being used . . . . .however your unit does seem to be using a Panaplex display. There is no chance that this is being for the indicator for the STEREO FM . . .is it ?
  7. 73's de Edd

    Slayer exciter problems

    Sir Andremaia . . . . . I used a simple diode instead of the LED and I replaced the 2N2222A transistor with a TIP41C ( the 2N2222A's all got "broken" ) I was figuring that all of the 2222As got ! SMOKED! I highly suggest the LED's use, due to its additional indication of activity...
  8. 73's de Edd

    Emerson MW8779W doesn't heat but turns on!

    I was just curious as to who the REAL maker of the unit was. Daewoo made some units for them. But your unit looks like an o o o older unit . . . as, when you look up some parts, they are . . .No Longer Available. That TMP u-Processor prefix used to and may still be Texas Instruments...
  9. 73's de Edd

    Airwick Freshmatic Max unit

    Looks like you got a real encapsulated and leaded chip on your board, not the naked chip covered with an epoxy blob . . . .continue test as suggested before . . .with C1 cap in your sights.. Conjunct thought . . . . If you had a scope and freq counter / E-PUT, an analysis of TP1 should reveal...
  10. 73's de Edd

    Airwick Freshmatic Max unit

    Sir spike1947 . . . . . Considering that this is the board being found inside I see the COB, and to its right a monolithic multilayer ceramic block capacitor ; which are inherently being limited in their max capacitance capability, versus physical size. We might strongly assume . . . what else...
  11. 73's de Edd

    Plc-xe40 projector help

    Order an extra remote (they are cheap ) because if you loose the one that came with it it becomes a useless paperweight. There is no way to adequately control the unit except with the remote. 1400 lumens isn't the brightest, but will work great as a Halloween projector. Probably not the best...
  12. 73's de Edd

    Chinese Hiland 0-30V/Audioguru PSU build (down the rabbit hole)

    Herr Bushmeister . . . You basically need to have the metering circuitry battery powered initially, so that you can figure the current required at that voltage level . Then you relate that to an equivalent resistor. E.G. the metering unit circuitry is using 5VDC ??? and pulling 500 ma of...
  13. 73's de Edd

    Pioneer SA-505 clicking

    Sir tooter . . . . . You got it ! . . . . that supply voltage is now being up into the initial range that you first mentioned. Now lets see why your relay won't relay . From your earlier voltage readings, from info transferred it seems like your amps audio power output stages are being...
  14. 73's de Edd

    Chinese Hiland 0-30V/Audioguru PSU build (down the rabbit hole)

    Back relevant to running your metering on an isolated power supply. If they left an open hole . . .and your mounting method has left the hole in the "donut" open, you can wind your own dedicated and ISOLATED single power winding with much lighter gauge wire . . .30-32 gauge . . . and...
  15. 73's de Edd

    Pioneer SA-505 clicking

    You have 3 out of 4 correct . . .The black meter negative test point should be same as the green circle OR the equally like neg of C406 or neg of C405 or top lead of very nearby R411. .....
  16. 73's de Edd

    Pioneer SA-505 clicking

    You say . . . . . Connected the meter to the power side of the R414 . . . . . . .and to the ground of the coil. Correct on the meter + connection , but the meter - goes to the Q405 emitter or any of the several ground connections that it shares. Your grounding and ungrounding of the...
  17. 73's de Edd

    Denon AVR-1912 E2/EA

    Sir Michael . . . . You did reveal readings of the circuitry that the two voltages were derived from as CN13, in its having proper +8 and -8 VDC on their pins 6 and 7. On the raw DC from the rectifiers that is coming in to make the Plus and Minus 8VDC supplues, they are initially labeling...
  18. 73's de Edd

    Pioneer SA-505 clicking

    1) test voltage across the mentioned leds for voltage fluctuation? From your description of the upsy-downsy of the voltage of that supply, when DC voltage testing it, I would suspicion that you would see that degree of variance in the change of illumination of the LED's. Right-o . . . . . on...
  19. 73's de Edd

    Denon AVR-1912 E2/EA

    What meter / brand / model is that ?
  20. 73's de Edd

    Yorkville 100watt Mixer/Amp - Replaced Transistors

    Sir Jason . . . . . . .Gee HEY ! I see that the balls been lobbed back into my court . . . how you do dat ? . . .you sneaky . . .velly- velly sneaky ! The best logic would be the initial evaluation of the final . . .power output stage . . to see how it responds, and if being flawless . . . to...
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