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|5/3/1999 11:52 PM|
Anyone know what that 3300 mf cap is doing in the preamp ? I'm having a devil of a time chasing down a power up/down crackle in this thing, subbing coupling and bypass caps one at a time so far hasnt gotten rid of it yet. thanks 'mpagers.
|5/4/1999 2:08 PM|
its not the standby switch and the o.t. seems fine.. Anyone got a schem for one of these ? I know there's one in History of Marsh. but my pal with a copy is out of town..
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The Ultimate Tone, Volume III by Kevin O'Connor
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|5/5/1999 5:07 AM|
||Trace might help!|
Trace might be able to help you out with this. He's a mine of knowledge on JCM800 Marshalls. Hopefully he'll pick up this thread!
Try tapping a few caps with a plastic implement (ball point pen) and see if you can reproduce the crackle. This pretty often helps.
|5/5/1999 8:52 PM|
||it was the main filter|
thanx Liam ! I was reminded of the old "bridge a good cap across it" test and I found it..
|5/6/1999 3:25 AM|
Glad you found it!
Was that one of the big blue ones? I've never had any trouble with those.
BTW, what's the 2210 like? I'm a bit of a 2203 fan, but I'm starting to think I could use 2 channels. The 2210's a 2 channel reverb 100 watt head, right? Do they sound anything like the earlier Master Volume amps?
|5/6/1999 4:31 PM|
You beat me to it!!!
|5/7/1999 11:23 AM|
These beasts sound NOTHING like the older master volume heads. If this is the one I'm thinking of, I can never keep these numbers straight, it has the tone control immediately after the first gain stage then diode clipping right before the mixer stage. This seems to make the drive channel sound a little buzzy to me.
I found a mod for this amp in my pile of notes the other day and it involves moving the tone controls to after the cathode follower. I have no idea where i got it from and I've never tried it so I don't know how it sounds.
Oh God! Here we go again with more Marshall mods!
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