Replacing The Electrolytic Capacitors In A Hammond AO28 Preamplifier!!

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  • เผยแพร่เมื่อ 1 ก.พ. 2025

ความคิดเห็น • 6

  • @deangoritz9625
    @deangoritz9625 5 ปีที่แล้ว +2

    Hey Dr Kemp, i watched your vids on the leslie relay, so i tested each speed control on both motors and they are functioning properly. So my next step is checking that relay switch. Thanks for all the great info and ill keep you posted

  • @timmoore3283
    @timmoore3283 3 ปีที่แล้ว

    Dr Kemp, what was the reading on the 40/40/30 filter cap you got to lead you to replace the can capacitor?

    • @ncilmo
      @ncilmo  3 ปีที่แล้ว

      Hello Tim. I don't have that old can anymore to check this for you. But the readings would have been at least 40% beyond the printed limits. But in doing a rebuild of an AO28, it is best practice to replace your can capacitors. That will save your transformer.

  • @MrFoz1234
    @MrFoz1234 4 ปีที่แล้ว

    Hey, i recently replaced capacitors and tubes on my L122 and i got a overdrive '-' (even with minimum gain). Did the same thing for vibrato and perc preamps. Do you have any guess in what can i do?

    • @ncilmo
      @ncilmo  4 ปีที่แล้ว +1

      What was going on that led you to replace those caps in the first place? You are talking about the preamplifier - correct?

    • @MrFoz1234
      @MrFoz1234 4 ปีที่แล้ว

      @@ncilmo yes! On the pecussion and vibrato pre amps as well as in the amplifier (H-AO-43-1). The caps needed to be restored because they dried out and the there was some tubes that needed replacement. The organ came with a big hum noise and it stopped after this work ( and they are all with the right capacitance). During this process i cleaned every contact in the manuals and in the drawbar pannel, removed all of the dirt and the drawbars that weren't working are now functional. I oiled it and it is free of dirt but there is no percussion sound as well as the overdrive problem (when two notes are played they collide with each other). I dont play yet with leslies so the sound goes through the speakers. If you wanna chat with me on instagram dms -(@tiagoafoz) reach me up there i'll be very pleased with your help man! Thanks!