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    Bugera 6260 schematics

    https://music-electronics-forum.com/showthread.php?t=50486&p=549341&viewfull=1#post549341

    https://music-electronics-forum.com/attachment.php?attachmentid=56844&d=1580538969
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    Sticky: Fender Machete Schematic

    https://music-electronics-forum.com/showthread.php?t=50594&p=550681&viewfull=1#post550681

    https://music-electronics-forum.com/attachment.php?attachmentid=57022&d=1582174574
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    Sticky: Ampeg G110 schematics

    http://techniguitare.com/forum/ressources/file/1617

    http://techniguitare.com/forum/ressources/file/1618
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    Resolution is not a problem, accuracy is a...

    Resolution is not a problem, accuracy is a problem.
    Adjusting to point where idle current just begins to rise, measured with 200mV DVM and read on penultimate digit, is only possible with helipot...
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    In order not to make a breakdown without need,...

    In order not to make a breakdown without need, between power supply and PCB pwr, in series with power supply voltage +40V and -40V set current limiter in form of resistors 100 Ohm / 50W.
    So you...
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    I think that Marshall series MG100... in output...

    I think that Marshall series MG100... in output uses IC TDA7293.
    Maybe can help schematis for Marshall MG100HDFX
    ...
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    21
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    379

    I'm very curious how to measure 10mA at 0.33 Ω. ...

    I'm very curious how to measure 10mA at 0.33 Ω.
    Ohm's law says it is 3.3 mV. With analog Vmeter can hard to measure, but DVM has walking on display +/- 1 digit.

    Autotransformer enables that...
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    When you plug guitar into Return jack, do you get...

    When you plug guitar into Return jack, do you get clean or distorted sound?
    Bias current is measured by connecting DC mA meter (range 200 mA) in series with emitter resisistor 0.33.
    Bias current...
  9. https://www.mercurymagnetics.com/2018/wp-content/u...

    https://www.mercurymagnetics.com/2018/wp-content/uploads/shop/specsheets/HI100-O.pdf

    Partridge HI100-O OUTPUT TRANSFORMER
    Blue wire is probably 100V line & NFB
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    Fixed bias is fixed bias. Hybrid bias with...

    Fixed bias is fixed bias. Hybrid bias with cathode resistor hm hm. Bias is not very stable, knows depends from tube to tube.
    Perhaps the winning combination is reduce voltage g2 to value between 1/2...
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    You're right. Now I find that voltage doubler is...

    You're right. Now I find that voltage doubler is powered by 15VAC transformer.
    Definitely no escape from horrors. The voltage doubler should be converted to a voltage tripler, and with the choice of...
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    The idle current value depends from tube to tube....

    The idle current value depends from tube to tube. The guaranteed value of idle current is only when using original factory tubes (Part no ... ...)
    To reduce idle current, a negative bias for the...
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    https://music-electronics-forum.com/showthread.php...

    https://music-electronics-forum.com/showthread.php?t=33782
    Alamo Capri Model 2560

    Input 110 acv connects to main (power) transformer T1
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    Output transformer test with ohmmeter Input =...

    Output transformer test with ohmmeter
    Input = primary = high resistance
    Output = secondary = low resistance
    Input is connected to the anode tube
    Output is connected to the speaker
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    - Have you tried replacing tube with a new one...

    - Have you tried replacing tube with a new one (not like new). Best try Boogie low noise tube SPAX7-A

    https://www.mesaboogie.com/tubes/pre-amp-tubes/SPAX7.html

    - When connects to gnd microphone...
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    Are electrodes (g1 / k / a) of half unused tube...

    Are electrodes (g1 / k / a) of half unused tube connected to gnd ?
    Look angelfire link.
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    56879 ...

    56879

    https://groupdiy.com/index.php?topic=19807.0

    http://apexelectronics.com/downloads/servman/sm_apex460.pdf

    http://www.angelfire.com/ky3/craigorris74/a460schemCFremoved.JPG

    1) Small...
  18. Something from Akai Reel Tape Decks ...

    Something from Akai Reel Tape Decks

    https://www.hifiengine.com/manual_library/akai.shtml?category=open-reel-tape-deck

    https://elektrotanya.com/showresult?what=akai
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    http://www.cerwinvega.com/manuals/pro/P1500XP1800S...

    http://www.cerwinvega.com/manuals/pro/P1500XP1800SXManual%20REVC_EnglishWEB.pdf

    Try to follow Troubleshooting page 26
  20. Replies
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    https://music-electronics-forum.com/showthread.php...

    https://music-electronics-forum.com/showthread.php?t=50492

    https://music-electronics-forum.com/showthread.php?t=50493


    Hi mikeskory
    No need to spam thread with same request.
    One Schematic...
  21. Replies
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    43,170

    Sticky: Marshall 20/20 Schematics

    https://music-electronics-forum.com/showthread.php?t=13904
  22. Randall Pro Tube 1000

    http://el34world.com/Forum/index.php?topic=23594.0

    http://el34world.com/Forum/index.php?PHPSESSID=2ssf7fe0rcor2fubk1nmlb1rb0&action=dlattach;topic=23594.0;attach=72458
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    Sovtek schematics

    https://github.com/a-wai/ampfactory/tree/master/non-free/Sovtek
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    Sticky: Fender schematics

    https://github.com/a-wai/ampfactory/tree/master/non-free/Fender
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    58
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    40,958

    Sticky: Ampeg schematics

    https://github.com/a-wai/ampfactory/tree/master/non-free/Ampeg
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    124,363

    Sticky: Vox schematics

    https://github.com/a-wai/ampfactory/tree/master/non-free/Vox
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    Sticky: Marshall MA

    http://musiciansroadhouse.com/viewtopic.php?f=70&t=11596

    http://forum.metropoulos.net/viewtopic.php?f=25&t=33579
    ...
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    Sticky: Marshall JMD1

    http://musiciansroadhouse.com/viewtopic.php?f=70&t=11599

    https://github.com/a-wai/ampfactory/tree/master/non-free/Marshall/JMD 1)
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