My sovtek has been a tank. I love the tone and the power this amp has.
however being that it was made in the 80s it has been recommended that i replace the el-caps.
upon looking inside i find that this amp had been repaired at some point before i got it. which was nearly 24 years ago now.
It appears that one of the caps most likely shorted and took out one of the diodes. you can see in the pics the replaced diode as well as the caps.
the primary filter caps in the power supply were replaced with 100uf caps. but the schematic calls for 220uf.
I have been told to use audio grade caps. my assumption is that they have a lower esr and therefore better overall transient response.
I routinely work in digital circuits and design with a combination of els and tantalum to get lower esr.
but to my questions.
Is it recommended to put the 220uf back into this amp?
Are there brands or specific makes of caps i would be best to use?
any other recommendations to ensure success?
thanks in advance.
however being that it was made in the 80s it has been recommended that i replace the el-caps.
upon looking inside i find that this amp had been repaired at some point before i got it. which was nearly 24 years ago now.
It appears that one of the caps most likely shorted and took out one of the diodes. you can see in the pics the replaced diode as well as the caps.
the primary filter caps in the power supply were replaced with 100uf caps. but the schematic calls for 220uf.
I have been told to use audio grade caps. my assumption is that they have a lower esr and therefore better overall transient response.
I routinely work in digital circuits and design with a combination of els and tantalum to get lower esr.
but to my questions.
Is it recommended to put the 220uf back into this amp?
Are there brands or specific makes of caps i would be best to use?
any other recommendations to ensure success?
thanks in advance.
The schematics you are LOOKING at may say one thing, that doesn't mean it has always been that value. You "love the tone and power" of the amp. SO then why would you want to go changing the cap values?
Personally I am not so sure transient response is a big issue in guitar amps. They roll off in the 3-5kHz region anyway, between amp and speaker.
Personally I am not so sure transient response is a big issue in guitar amps. They roll off in the 3-5kHz region anyway, between amp and speaker.
The schematic is for a mig100h and mine is a mig100u, which there are no available schematics. I know there were likely differences but to ensure I didn't create an issue I felt it was wiser to ask then learn the lesson the hard way.
I appreciate your input.
I appreciate your input.
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