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    The readings that you got on C2 caught my eye...

    The readings that you got on C2 caught my eye too. However, I am more confused by the readings than anything. So one way I read it is that C2 measures 0.3ohms and the other way I read it is that it...
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    Here I hope this is what you need. Only thing is...

    Here I hope this is what you need. Only thing is that the part designations are not labelled, only the value.

    Edit: Scrolling through the thread I see the schematic was already posted.
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    Even a cracked leg or trace connection could be...

    Even a cracked leg or trace connection could be suspect. I would check ohms readings right at the base of Q1 and make sure of continuity. Also test Q1 too as has been suggested.
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    How does the distortion translate on a scope?

    How does the distortion translate on a scope?
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    Helmholtz asked "Do you have a scope, signal...

    Helmholtz asked "Do you have a scope, signal generator and dummy load?" So we have to ask how you are monitoring the output? If you are only using a speaker to monitor output then make sure the...
  6. This thread has so many great recommendations......

    This thread has so many great recommendations...
    https://music-electronics-forum.com/showthread.php?t=41039

    I like these...
    http://www.tubebooks.org/technical_books_online.htm

    The Electric...
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    Mykey = SGM So funny to see this old thread...

    Mykey = SGM

    So funny to see this old thread pop up after all these years. Really should start a new thread, if you haven't already, to troubleshoot your amp.
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    Line 6 Variax Service Manual

    Line 6 Variax Service Manual
  9. Could this be it? ...

    Could this be it?

    https://pdf1.alldatasheet.co.kr/datasheet-pdf/view/16215/PHILIPS/BF513/+0W327UL.hKpRudGKCNC+/datasheet.pdf
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    That schematic is very difficult to find and we...

    That schematic is very difficult to find and we have had other requests for it. Unfortunately, the other requests for the schematic has been unsuccessful. Only one found so far is the Jazz King II,
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    Weird thing is that when I go down to that...

    Weird thing is that when I go down to that original post and click it, the file downloads correctly on my computer.
  12. Thread: Nope!

    by DrGonz78
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    Holy Smokes Batman!!

    Holy Smokes Batman!!
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    Post the schematic :thumbsup:

    Post the schematic :thumbsup:
  14. There might be other issues to look at involving...

    There might be other issues to look at involving the IC's on the board. If stuck in drive mode then there is a 4560 IC that would be a suspect. In fact, the other IC's would be suspect since they...
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    I have to wonder if there are any date codes on...

    I have to wonder if there are any date codes on these cans? Just thinking that they might be sitting on the shelves for too long. Sure could be production issues as well and then coupled with sitting...
  16. Man those solder joints are really bad in places...

    Man those solder joints are really bad in places on that board. I would fix up all the joints I could while the board was out. Were these solder joint like this when you took the board out?

    57199...
  17. With the recent decline in availability for axial...

    With the recent decline in availability for axial type electrolytic capacitors justradios has been on my radar. I have yet to order from them but I will in the near future.
  18. The Dude would Abide that place for sure!

    The Dude would Abide that place for sure!
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    Had a 5Y3 in an old 50's Silvertone amp that was...

    Had a 5Y3 in an old 50's Silvertone amp that was faulty. I recapped the amp, replaced dropping resistors, and some plate resistors. I got rid of most of the bad noises I was hearing but I still...
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    I could envision a Monty Python skit. "Sure I can...

    I could envision a Monty Python skit. "Sure I can take a look at your Mesa". They then set the Mesa on the bench. "Oh it looks real nice", says the amp tech.
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    Sometimes emails get overlooked and you may get a...

    Sometimes emails get overlooked and you may get a delayed response or nothing. Seems like they took good care of you though. Nice 👍
  22. In a pinch for some parts I head over to Fry's...

    In a pinch for some parts I head over to Fry's electronics but typically only for resistors. I also hit up Apache reclamation which has bins of NOS components. I found lots of tubes, resistors,...
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    Just in case someone comes upon needing this...

    Just in case someone comes upon needing this schematic here it is... It's Jazz King II. Unfortunately never found the Jazz King I schematic. Also the scan is upside down so maybe they were in...
  24. Yup pictures will speak a thousand words. Also...

    Yup pictures will speak a thousand words. Also have you tried cleaning the pot and checking the solder joints. Maybe you have already done that but just have verify.
  25. But it was the Sammy Hagar cover band!! They just...

    But it was the Sammy Hagar cover band!! They just wanted to get there promo recordings to get some gigs. 😊
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    Had a Mesa Boogie mkiii where one tube lost its...

    Had a Mesa Boogie mkiii where one tube lost its vacuum whited out and the other tube on the other side had zero conductance. The two middle tubes were still good and the customer claimed he had...
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    If it has that molex connector it needs to be...

    If it has that molex connector it needs to be removed and soldered straight to board. As I remember there was a service bulletin from Bugera about fixing that exact issue.
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    I remember working on a 6262 where the yellow...

    I remember working on a 6262 where the yellow filament wiring had to be soldered directly to the board due to the fact that the molex connector was not holding up well. Not sure what the connector...
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