Search:

Type: Posts; User: alexradium; Keyword(s):

Page 1 of 11 1 2 3 4

Search: Search took 0.02 seconds.

  1. Replies
    5
    Views
    134

    not much mistery,jacks go bad,oxidation first...

    not much mistery,jacks go bad,oxidation first problem,or bad solderings both on the jack or the ground reference
  2. Replies
    2
    Views
    93

    yes,the last one,never understood why people are...

    yes,the last one,never understood why people are afraid to turn knobs....
    one reason can be because of the different topology,the BF module has more loss after the tonestack than a Vox/Marshall and...
  3. Replies
    5
    Views
    183

    1meg in series with a grid....bad idea i guess...

    1meg in series with a grid....bad idea
    i guess in boost mode it becomes a feedback,so less noise.
    sometimes there is stray capacitance that couples rectifier buzz through the filament in...
  4. Replies
    7
    Views
    317

    https://www.tube-town.net/ttstore/tt-custom-shop-c...

    https://www.tube-town.net/ttstore/tt-custom-shop-chassis-data-service.html
  5. Replies
    7
    Views
    317

    Sorry,brownsound Is out of business,asked around,...

    Sorry,brownsound Is out of business,asked around, there's another company doing custom stuff,I will give you a link.
    As far as transformer,Inmadout is active.
  6. Replies
    7
    Views
    317

    try emailing the guys at brownsound.it,they can...

    try emailing the guys at brownsound.it,they can make custom stuff,iirc.
  7. i would check out the dual supply for the...

    i would check out the dual supply for the opamps,especially on U1,that is notorious for problems in all the budget Fender amps like the hotrod,and wiggle all the flat cables connecting the boards,it...
  8. Replies
    8
    Views
    380

    this site has most of the good practices in tube...

    this site has most of the good practices in tube amps
    http://education.lenardaudio.com/en/14_valve_amps_4.html

    For education purpose i find that any old book by RCA GEC Radiotron etc has most of...
  9. Replies
    8
    Views
    380

    not exactly a new thing ,Marshall major had the...

    not exactly a new thing ,Marshall major had the cathodyne and the gain stages after to 4 KT88s.
  10. Replies
    35
    Views
    992

    Here they are

    Here they are
  11. Replies
    35
    Views
    992

    I have seen it, I'll dig the hard drive

    I have seen it, I'll dig the hard drive
  12. Replies
    3
    Views
    183

    https://music-electronics-forum.com/showthread.php...

    https://music-electronics-forum.com/showthread.php?t=36027&p=542231&viewfull=1#post542231
  13. Replies
    8
    Views
    377

    i would get a 2 way active crossover and separate...

    i would get a 2 way active crossover and separate power amps, so you can assign an adequate level to the tweeter.
  14. Replies
    7
    Views
    1,051

    do you mean there is only the gain channel,not...

    do you mean there is only the gain channel,not the clean one?
    i have a Competition schem ,it should be like what you have,can you post a couple pics of the preamp part?
  15. old fuse blows sometime,but when you replace it...

    old fuse blows sometime,but when you replace it its sorted out,then it can be a shorted rectifier,faulty main capacitor,defective HV secondary.

    just use a bulb limiter in series with mains voltage.
  16. Replies
    15
    Views
    458

    bias voltage -75v means the amp is in standby,to...

    bias voltage -75v means the amp is in standby,to get proper bias you need to plug an input jack and a speaker or load in the output jack,then you are in play mode
    it is normal to have signal on v1...
  17. there should be another sheet with switching...

    there should be another sheet with switching logic,if you need that i'll look around
  18. i use chrome,weird

    i use chrome,weird
  19. i have these,take care because chinese schematics...

    i have these,take care because chinese schematics always have some error.
  20. Replies
    1
    Views
    221

    power stage is a chip attached to the...

    power stage is a chip attached to the fan/dissipation assembly.
    Try discerning the problem by using the send and return jacks,the cd in and headphones,hear what you get
  21. Replies
    9
    Views
    6,464

    55422

    55422
  22. If the amp has also a distorted channel always...

    If the amp has also a distorted channel always running and just switched out,it can be radiated on top of the clean,in general it should be grounded at some point.
  23. Replies
    13
    Views
    441

    the power section on that schematic is the exact...

    the power section on that schematic is the exact same of the 100w models MTS and legacy,i bet its less voltage in reality,more like 350/400V on B+ which is more appropriate for el84s,,that explains...
  24. anywhere over 400V on screens is too much and...

    anywhere over 400V on screens is too much and won't give more power,plus you have even more differential between pin 4 and 5.
  25. Replies
    34
    Views
    6,361

    try a slow blow,inrush current can easily blow...

    try a slow blow,inrush current can easily blow the fast one.
  26. Replies
    12
    Views
    2,242

    Yes the original post has been moved to another...

    Yes the original post has been moved to another section
  27. Replies
    12
    Views
    2,242

    Blackstar Stage HT60

    disconnect all the main PT secondaries and start powering through a bulb limiter in series
  28. Replies
    73
    Views
    1,834

    I have a 4211 on the bench right now, basically...

    I have a 4211 on the bench right now, basically it's the 100w version,if you need help I can give you measurements and values.
    The boost channel is not the best I've heard on Marshalls,that was one...
Results 1 to 28 of 306
Page 1 of 11 1 2 3 4