Lowfreq
Well-known member
Hi all,
Been having some issues with my sovtek mig-50. I recentley changed from a marshal jmp-1 rack system w fx bla bla to just the sovtek as the sound was so huge in comparison.
BUT..........the pots on the sovtek have had a bit of a hard life and i think have finally given up, as my sound is no longer nice and phat, my bass pot is really loose and doesn't seem to make any difference to the bass response at all (usually this thing has too much bass)
I had the whole amp re-valved and biased a few months ago, and the tech who did it mentioned something about replacin all the pots as a few were pretty hammered, and because they were kinda odball pots, he recommended getting them all replaced with something else instead of trying to preserve the look by replacin one or two pots.
Now this was all before I discovered DIY :roll: i can fix myself?? no??
So i hunted on the net and found this schem www.heysam.com/schem/sovmig50.pdf
Now my schem understanding is ok but still pretty basic, and i seem to struggling to locate all the pots on the schem.
We have vol1,vol2 which i'm guessin are the 1MA at the inputs.
Now i can see another 1Ma and a 5k linear but thats it!! am i blind?? or are the rest not shown?
Any ideas people? I'm assuming that the pots need to be log unless otherwise stated like the 5k linear?
I know that this is valve based, and so far i've only built solid state mic pres etc, so i'm aware that this is new/dangerous territory for me and maybe left up to a technician anyway, but if i could do itmyself i'd be very happy. I will do an in depth search about the dangers of valve gear when i get a chance (1/2 hour luch breaks are a bit limiting)
I know that the power amp stage of the amp is working sweet, as i can still use my jmp-1 pre into the fx return (a mod i had done a few years ago)
Any help would be awesome, as this amp is a killer that usually eats other amps for breakfast :twisted: :twisted: (i've played against a few) and i'd like to get her back to her magical self :green: :green:
regards
Steve
Been having some issues with my sovtek mig-50. I recentley changed from a marshal jmp-1 rack system w fx bla bla to just the sovtek as the sound was so huge in comparison.
BUT..........the pots on the sovtek have had a bit of a hard life and i think have finally given up, as my sound is no longer nice and phat, my bass pot is really loose and doesn't seem to make any difference to the bass response at all (usually this thing has too much bass)
I had the whole amp re-valved and biased a few months ago, and the tech who did it mentioned something about replacin all the pots as a few were pretty hammered, and because they were kinda odball pots, he recommended getting them all replaced with something else instead of trying to preserve the look by replacin one or two pots.
Now this was all before I discovered DIY :roll: i can fix myself?? no??
So i hunted on the net and found this schem www.heysam.com/schem/sovmig50.pdf
Now my schem understanding is ok but still pretty basic, and i seem to struggling to locate all the pots on the schem.
We have vol1,vol2 which i'm guessin are the 1MA at the inputs.
Now i can see another 1Ma and a 5k linear but thats it!! am i blind?? or are the rest not shown?
Any ideas people? I'm assuming that the pots need to be log unless otherwise stated like the 5k linear?
I know that this is valve based, and so far i've only built solid state mic pres etc, so i'm aware that this is new/dangerous territory for me and maybe left up to a technician anyway, but if i could do itmyself i'd be very happy. I will do an in depth search about the dangers of valve gear when i get a chance (1/2 hour luch breaks are a bit limiting)
I know that the power amp stage of the amp is working sweet, as i can still use my jmp-1 pre into the fx return (a mod i had done a few years ago)
Any help would be awesome, as this amp is a killer that usually eats other amps for breakfast :twisted: :twisted: (i've played against a few) and i'd like to get her back to her magical self :green: :green:
regards
Steve