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trimmer

  1. tusntuk2

    HELP! Can't set BIAS on Kenwood KA-3500

    Greetings fellow Ak'ers! This puzzle has me stumped - any good puzzle solvers out there wanna try it? I have rebuilt a Kenwood KA-3500 amp with a full recap, many transistors, resistors and diodes, and new Bournes trimmers, too. This is my 12th recap of this model, but I'm stumped. The Left...
  2. ocdecio

    Trimmer for 2235 and 4270

    Did anyone replace this type of trimmer on the 2235 or 4270 amp board, and if so, what would fit here?
  3. tusntuk2

    Bias problem on a KA-7100, new trimmer does nothing

    Can't set Bias on a KA-7100 Having a problem with an ineffective bias trimmer on a Kenwood KA-7100. Got a KA-7100 to restore and after initial DBT test and a little de-oxit I tried setting the trimmers for center voltage and bias before the restoration. The Left channel trimmers would not...
  4. Mike Sweeney

    2285B replacement trimer pots work :)

    Not pretty but they do work. I found out after I had ordered my first set of pots ( 1K and 2K) that the 1K pots had been changed on the schematic to 300 ohm and not the part lists 1K :/ And then I found I could not get the 300 ohm in the same model/series as my 2K. So now I have two different...
  5. dlucy

    Widening modern trimpots or trimmer resistors to fit 7.5mm PCB holes

    I'm replacing the trimpots in a vintage (1970's) receiver and I've ordered standard Bourns trimmer resistors, but the new pots have 5mm lead spacing whereas the old ones have 7mm or 7.5mm, so the PCB has the wider-spaced holes. What is the best way to deal with this cleanly and reliably? 1. I...
    • dlucy
    • Thread
    • lead spacing recap restore trimmer trimpot
    • Replies: 2
    • Forum: Solid State
  6. dlucy

    Recapping, Rebuilding, Restoring, Rest-o-modding... a Pioneer SX-450 receiver

    Well, AK'ers, I owe many of you a big round of thanks. I've finished my first complete restoration, it was a SX-450, and most of what I did was a result of you all asking each other questions, answering them, and leaving pointers to more info. You guys rock! Thank you! It sounds terrific (with...
    • dlucy
    • Thread
    • idle current pioneer recap recapping restore silver face snubber sx sx-450 trimmer
    • Replies: 53
    • Forum: Pioneer Audio
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