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  1. So the red Led (LED2) is the one that won't turn...

    So the red Led (LED2) is the one that won't turn all the way off? If so, with the TR1 voltages you measured, TR1 must be leaky.
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    Also C7.

    Also C7.
  3. Sorry, no suggestions for the notch filter. But...

    Sorry, no suggestions for the notch filter.
    But Q5 base is measuring pretty much a double diode drop from B+ ?
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    I don't see that anywhere on the schematic you...

    I don't see that anywhere on the schematic you posted? :confused:
    The relay or the switch could still be intermittent. Or a shaky solder connection.
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    Set your meter to resistance. Put one probe on...

    Set your meter to resistance. Put one probe on each speaker terminal, + and - doesn't matter for this. Resistance should probably measure somewhere in the 8 to 40 ohms range. If necessary do the...
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    Sticky: I found out there is an option, when firefox...

    I found out there is an option, when firefox starts, instead of showing homepage, you can choose 'show my windows and tabs from last time'.
    So you can close firefox with tabs open, and next time you...
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    Sticky: I bought a refurb windows 7 machine last winter. ...

    I bought a refurb windows 7 machine last winter. I've yet to migrate over to it.
    I guess I've been waiting for support to end for 7, then I'll feel ok about it. ;)
    I have about 30 Firefox tabs...
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    The troubleshooting in the first post made me...

    The troubleshooting in the first post made me think it's the actual speaker in the right side that is bad.
    Receiving signal, no sound.
    Have you tried measuring resistance at the right speaker...
  9. Thread: Desktop Wallpaper!

    by g1
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    I like the scenic ones too. Mine is just a...

    I like the scenic ones too. Mine is just a generic one from the 'vistas' section of the desktop backgrounds in windows vista.
    It's actually a Japanese hillside reflecting in a lake I think.
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    You must have all tubes in circuit to check...

    You must have all tubes in circuit to check voltage. If any of V4 - V7 are removed, no tube should light up.
    If all of V1,V2, and V3 are not installed, you could get a result like you are...
  11. Thread: Dual tap OT quandry

    by g1
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    You're going to be busy for awhile. :D

    You're going to be busy for awhile. :D
  12. One thing I'll mention is I was surprised to see...

    One thing I'll mention is I was surprised to see so many ECB pinouts in this unit when I'm used to seeing EBC on 2N types.
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    A Fender branded 5Y3 could very well be made by...

    A Fender branded 5Y3 could very well be made by sovtek. If so, they will visibly be very similar.
    Hope you have better luck with the TAD.
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    I wonder if those examples aren't using those DC...

    I wonder if those examples aren't using those DC heater supplies for other things as well, resulting in a need for the ground reference?

    edit: I see Merlin does speak of shorting out the...
  15. My transistors are: Q1,2,4, 2N3416 All others...

    My transistors are:
    Q1,2,4, 2N3416
    All others stamped with Heathkit numbers from parts list.
    Q3 & 5 plastic TO-99, Q6,7,8, small cans as shown in wave gen. pictorial (#10)
    Q10 as shown in...
  16. Doesn't seem to be an issue for you, but my unit...

    Doesn't seem to be an issue for you, but my unit had problems with the trim pots. There was LF modulation of the output which I was pretty sure must be a bad cap issue, but turned out to be that the...
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    You are on the bulb limiter? Do not use math...

    You are on the bulb limiter? Do not use math based on 32V total for heaters, measure it. What is the DCV across C211?
    Measure each power tube from pin 2 to pin 7, not to ground. Measure pin 4 to...
  18. Thread: Dual tap OT quandry

    by g1
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    This is a little anecdote I've shared before, but...

    This is a little anecdote I've shared before, but it is possible the diode got implemented for this reason and just got continued on because 'that's how we do it now'.

    This first mass-produced...
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    So it turned out the resistor was getting it's AC...

    So it turned out the resistor was getting it's AC source from the PT secondary like in this schematic?
    And you were missing the ground between the LED cathode and the 1nF ?
    I'm going to guess...
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    There is a table showing which voltages should...

    There is a table showing which voltages should appear at those A,B,C points Enzo mentioned. It's on page 2, sector F-3 labelled 'switching logic'.

    Also, if you do not have a footswitch connected,...
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    Aside from the reliability factor, it drives me...

    Aside from the reliability factor, it drives me nuts when a manufacturer of a combo amp has the amp end of the speaker lead hardwired and also soldered to the speaker. This is when I want to see...
  22. I think I've seen field coils wired from B+ to...

    I think I've seen field coils wired from B+ to ground, in which case it does not act as a choke, but may be acting as 'ballast' to load down the supply.
    In your Supro example, I think this is the...
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    Just to be sure, try putting the same kind of...

    Just to be sure, try putting the same kind of pressure on the power tube.
    Were both rectifiers that were noisy Sovteks?
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    Both circuits have AC source, 2 diodes, and 3.9K...

    Both circuits have AC source, 2 diodes, and 3.9K resistor in series. (cap steps down AC in one circuit, transformer does it in other)
    Diodes are biased reversed in one circuit, but should not...
  25. Thread: Randall RG75/G3

    by g1
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    No DC along with that signal getting to the relay?

    No DC along with that signal getting to the relay?
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    On your speaker jack, the shorter lug would be...

    On your speaker jack, the shorter lug would be (-) and go to the negative speaker terminal.
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    One side of the line goes straight to that pot. ...

    One side of the line goes straight to that pot. That's why I call it line adjust. It affects the meter by adjusting the voltage going to the whole unit.
    I still say you should swap the end wires...
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    I would call that 'line adjust' rather than meter...

    I would call that 'line adjust' rather than meter adjust. I doubt it gets used near either end so a 250 or 350 should both work there, the wattage rating would be the important spec.
    Is it working...
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