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  1. So is. The original reference is essential.

    So is. The original reference is essential.
  2. Iīve searched for videos of that model and the...

    Iīve searched for videos of that model and the first fifteen or twenty that I found on youtube were the modern version. This is the old version. In combos the dog bone shaped metal plates that hold...
  3. Here is the schematic: ...

    Here is the schematic:

    https://music-electronics-forum.com/attachment.php?attachmentid=47693&d=1521589896
  4. I hope this doesn't happen in the amp... ;) ...

    I hope this doesn't happen in the amp... ;)

    54972
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    With metal film and metal oxide resistors there...

    With metal film and metal oxide resistors there can be confusion but those of carbon film (I refer to modern ones) usually maintain the proportions of physical volume and dissipation capacity.
    So,...
  6. I use them without polarizing, but you can use it...

    I use them without polarizing, but you can use it polarized keeping the proper orientation.

    Note: I see that the second mute string (V2a) is double. A part of it takes the signal from the plate...
  7. I'm sorry, but I don't save images from that...

    I'm sorry, but I don't save images from that model.

    Regarding these capacitors: they serve to filter the signal through them and make the mute depending on the channel that is activated. They have...
  8. These sets of electrolytic capacitors (five) seem...

    These sets of electrolytic capacitors (five) seem to compose 320uF per pair. They seem to replace the original capacitors associated with the operation of the mutes in the switching circuit. Itīs...
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    You could try with just a pair of 6L6. You can...

    You could try with just a pair of 6L6. You can remove 1 and 4 or 2 and 3 for this.
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    That wire corresponds to the feedback line. I...

    That wire corresponds to the feedback line. I don't know if it could be related to the problem but:

    - make sure that have a strong contact on both connectors.
    - Pass the wire under the...
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    https://schematicheaven.net/boogieamps/boogie_noma...

    https://schematicheaven.net/boogieamps/boogie_nomad45.pdf

    Can't you find 6.3VAC on the multiconnector?
    In that case, what happens if you measure it disconnected from the board?
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    As a possibility, the amp uses a J175 FET to...

    As a possibility, the amp uses a J175 FET to deactivate the Solo function (normal mode). Iīve seen in others (Rectifiers) that when a FET fails it can induce noise. Simply removing it could you check...
  13. Old Peavey Deuce?

    Old Peavey Deuce?
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    Vp = 462, Vs = 454V, Vg = -39v and 35 & 36mA...

    Vp = 462, Vs = 454V, Vg = -39v and 35 & 36mA looks good.
    I dīont know how to interpret the measures in AC that you put but associating it with what happens I have remembered that the output...
  15. Another one. I almost know to do it by heart ;) ...

    Another one. I almost know to do it by heart ;)

    http://www.pedrovecino.com/biasrec3.JPG
  16. Difference in volume between both channels is...

    Difference in volume between both channels is normal. Clean channel with a gain adjustment of 5 or 6 (to keep it clean since it has a circuit that generates overdrive above those settings) requires a...
  17. It could have a different assignment than in...

    It could have a different assignment than in Powerball I, even with that triode assigned in another socket... If you want to try cutting pin 1 in other tube, go ahead with it.
    Juan Manuel: itīs not...
  18. That part of the scheme corresponds to the...

    That part of the scheme corresponds to the Slavemaster section. If I remember correctly itīs a rather strange circuit incorporated into the loop and assignable by footswitch capable of generating an...
  19. I don't know how you get those 130mA. I always...

    I don't know how you get those 130mA. I always measure the tubes individually to know what intensity flows through each one.

    In relation to the sound of channels 3 and 4, in Powerball I the...
  20. I have never worked with Powerball II but with...

    I have never worked with Powerball II but with many Powerball I.

    Channel 4 has more overdrive than channel 3, with slightly higher low content and also more compression. But this can not be seen...
  21. I will not discover the gunpowder with this but I...

    I will not discover the gunpowder with this but I consider that a post-pi master volume replacing the bias feed resistors works better than the original.
  22. Noise and modulation are completely abnormal....

    Noise and modulation are completely abnormal. Electrolytics look very good. Have you tried installing another choke?
  23. The second tube (12AX7 / ECC83) is essential for...

    The second tube (12AX7 / ECC83) is essential for it to work unless it has been modified.
  24. Itīs probably that. 6P3S as 6V6. Groove tubes...

    Itīs probably that. 6P3S as 6V6. Groove tubes distributed it 25 years ago as 6V6HD.
    It was the first Russian "6L6" distributed in Western Europe through brands such as Edicron, Ultron and others...
  25. In my book "How to disable an amplifier" I...

    In my book "How to disable an amplifier" I explain it ;)
    One possibility is bridge those contacts and set the selector to the "low" position.

    54556
  26. The Twin red knob (although there is some...

    The Twin red knob (although there is some identical version with black knobs), I imagine.
    If you don't use it, the only connection that can fail is the one that exists internally inside the "power...
  27. I hope I understood well, but I suppose that...

    I hope I understood well, but I suppose that these measures (51 and 52mA) are for each pair, so you should divide it by two.
    26mA across the plate matches approximately with ≈32mA in the cathode,...
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    I think the really bad thing in that pic has not...

    I think the really bad thing in that pic has not been the mechanical problem with the original welds but with the new ones.
    I dīont want to imagine (it may not be the case) the installation of a new...
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