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  1. C

    Very Old Components I Can Not Identify.

    Hi, Not sure I can add much to this, but those packages went under the generic "high reliability" term, so were used in any place that needed them, like military, medical, satellite communications, LNBs for dishes, etc. I have seen them also in early mobile/cell phones, where they were used...
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    CPU Power Supply Mod

    I'm impressed! You have done a really good job of this and you should be rightly proud. Only thing I can add really, is that in my experience, ALL electrolytics should be replaced at the first sign of any problem, or at some "unfathomable" problem. There was a big scandal a few years ago...
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    Can you detect leaking batteries electronically?

    Hi, Yours had the digital display? If so, then I suspect that a partially bad contact at the battery contact is causing digital corruption. I don't think it is an intentional low battery warning, but probably random signs of problems because the digital side of things keeps getting corrupted...
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    Denon Receiver Acting Strange

    Thank you very much Stoopalini for your answers. One of your clarifications seems very significant to me? The volume control sticking at the last setting and not some pre-set value drags my interest away from the multiplexer and right at the volume control itself. Typical problems around...
  5. C

    stepping up voltage does not work

    That is just an example. The transformer matches the 600 ohm output impedance of a typical microphone to the input impedance of the audio gear. This is typically 10K, or roughly 17:1 for maximum power transfer and minimum distortion of the sound.
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    stepping up voltage does not work

    It's an American term for an impedance matching transformer, say microphone to line level.
  7. C

    Plasma Torch Height controller (not so simple voltage divider)

    Wouldn't this use a circuit like ones developed to automatically adjust the distance between the carbon electrodes in an arc-lamp? Looking for something like that then, I found this: http://www.lafavre.us/brush/lamparc.htm Could that be of some help, or the books mentioned?
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    Denon Receiver Acting Strange

    Hi Thomas, Whenever I was trying to repair things, a good list of "symptoms" like you posted really helps any service engineer. So thank you for that! OK, next stage is to rule out as much as possible and hope your supositions are correct... To take your points in order then. The...
  9. C

    What is this element?

    Could I ask what wires (if any?) were connected to it? Also what if anything was it soldered to? I keep thinking of capacitor, ribbon and electret mics. Of the three I'm suspicious it could be the electret element of an electret condenser microphone? That looks like a small piece of white...
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