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  1. Replies
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    Are you sure you disconnected all secondary wires...

    Are you sure you disconnected all secondary wires including the heater windings (total of 12 wires)? What is your bulb wattage?
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    To make sure, you can do an additional test: With...

    To make sure, you can do an additional test: With ALL secondary wires disconnected and on the bulb limiter, measure primary and secondary voltages and see if voltage ratios are correct or not.
  3. Means around 15W or 60% plate dissipation. Should...

    Means around 15W or 60% plate dissipation. Should be fine.
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    PT might have a short between the HV winding and...

    PT might have a short between the HV winding and core/ground. Measure DCR between CT and chassis.
  5. THe schematic shows 1.2R (not 1.0R) cathode...

    THe schematic shows 1.2R (not 1.0R) cathode resistors. So 35mV corresponds to only 29mA cathode current.
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    This table specifies 7A max for chassis wiring:...

    This table specifies 7A max for chassis wiring: https://www.powerstream.com/Wire_Size.htm
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    I don't think we disagree on the topic either and...

    I don't think we disagree on the topic either and am sure it is in the best hands with you.
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    There is a possibility that the person who...

    There is a possibility that the person who installed the switch, reversed the OT primary leads on the switch, which might give rise to high current draw in pentode mode caused by oscillation....
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    My comments were solely cap measurement/meter...

    My comments were solely cap measurement/meter (not fuzz issue) related. I wouldn't suggest to replace caps without clear indication.
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    But we have two caps self-heating.

    But we have two caps self-heating.
  11. Replies
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    That's not normal. Check for correct ecap...

    That's not normal. Check for correct ecap polarity. Wrong polarity can damage the cap.

    Your out-of-circuit cap/ESR measurements all look good (old and new caps). In-circuit measurements are always...
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    Yes, that's what I originally bought them for....

    Yes, that's what I originally bought them for. But with high speaker currents I wouldn't want to rely on some press fit grounding.
    So they are useless.
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    I can confirm that the 2 RCS plugs have NO...

    I can confirm that the 2 RCS plugs have NO solderable ground lugs/tabs (at least the two I once bought). The body is a single massive piece of metal (probably nickel plated cast zinc). It doesn't...
  14. Looks as if the author is a certain T(im)Robbins...

    Looks as if the author is a certain T(im)Robbins :)
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    Peak PI output is actually less than 1/4 HT.

    Peak PI output is actually less than 1/4 HT.
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    Pictures? I'd start with warm soapy water on a...

    Pictures?

    I'd start with warm soapy water on a cloth.
    If that's not enough use some oil (or WD-40) on a cloth (after drying) and (carefully) follow up with naphta or white spirit - or soapy water...
  17. "Panning" between out of phase signal versions...

    "Panning" between out of phase signal versions produces phase modulation. And phase modulation always means frequency modulation as well. The frequency shift is proportional to the rate of phase...
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    Yes, but the OP's question was about leakage. And...

    Yes, but the OP's question was about leakage. And only the leakage test requires high voltage (could be taken from the amp).
    The importance of real cap value (as opposed to DMM cap measurement) and...
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    The simple setup described in posts #12/13 is all...

    The simple setup described in posts #12/13 is all you need to measure leakage.
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    Sorry, I misinterpreted. As Rg1-k is specified as...

    Sorry, I misinterpreted. As Rg1-k is specified as a max value, any lower value is fine with the KT88s. And a lower source impedance is able to drive a lower load impedance. So no problem with halving...
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    I can't think of a reason why the static field of...

    I can't think of a reason why the static field of a bigger speaker magnet should give rise to feedback.
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    Grid leak means a DC path between grid and...

    Grid leak means a DC path between grid and cathode. Lowered AC source /PI impedance doesn't matter.
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    Don't forget that chlorine is a gas. It...

    Don't forget that chlorine is a gas. It evaporates and then attacks and corrodes most everything. Sometimes the damage shows after years.
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    Chlorine is one of the most aggressive and...

    Chlorine is one of the most aggressive and corrosive chemical agents. It seems counterproductive to fight corrosion with a highly corrosive substance.
    The tiniest residue may cause a lot of long...
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    OTs having specs of 50/60W and a primary...

    OTs having specs of 50/60W and a primary impedance of 4k to 4.5K are very common for 2x 6L6 amps with a B+ of around 450V.
    I guess it would work but the lower impedance will cause excessive plate...
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    Well if a measurement with 9V gives a leakage...

    Well if a measurement with 9V gives a leakage resistance below 500k, the cap is definitely bad.
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    I think you meant 1V across the 1M corresponds to...

    I think you meant 1V across the 1M corresponds to 1ľA.

    According to ecap manufacturers' (Epcos, Nichicon) recommendations, the reforming current can be up to 5mA and the recommended series...
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    1) 2k2 is the proper cathode resistor value. 220R...

    1) 2k2 is the proper cathode resistor value. 220R cause very hot biasing, low plate voltage and poor tube operation.

    2) Assuming the new Celestion speaker gave rise to the feedback issue, you...
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