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Revoicing the Ultra channel on a DSL100/DSL50
Posted: Mon Apr 30, 2007 8:44 pm
by Mike
Posted: Tue May 01, 2007 11:16 am
by Mike
Well fuck you then cuntface.
Posted: Tue May 01, 2007 11:29 am
by Doog
Haha, I only just saw it. Cheers Mikey!
Posted: Tue May 01, 2007 11:32 am
by Doog
Does it look like a straight cut, or do you have to jumper the two points?
edit: ne'ermind, I didn't realise there was another page.
Posted: Tue May 01, 2007 11:36 am
by Mike
yeah just a straight cut, C12 or C13 look like the culprits, I reckon you should give it a go on both, you can always just clip one leg - play through it with the chassis out and then solder the leg fixed if yuo don't like what you hear - could be the ticket though.
Posted: Tue May 01, 2007 12:08 pm
by Doog
Some cunt (I don't think it was me) has glued one of the dials on, so I can't remove the PCB
![Mad :x](./images/smilies/icon_mad.gif)
I'm just gonna end up breaking the shaft off the pot if I try any harder.
I can get at C12 and C13, but I'm a bit concerned about not being able to get at the board to put in a new cap if need be..
Should I man up and just cut it as is? I guess as long as it doesn't effect the green channel, it's not gonna cause any problems, seeing as how I pretty much never use the red channel. And I don't really see myself ever selling it..
Posted: Tue May 01, 2007 12:28 pm
by Doog
I cut it! In a way I can probly solder it back together. Amp warming up now..
Posted: Tue May 01, 2007 12:30 pm
by Mike
Yeah you can just solder that badboy back together!
Let me know how it goes!
Posted: Tue May 01, 2007 12:36 pm
by Doog
It's working and it sounds pretty good, but it's been a while since I've heard the Ultra channel anyways. I'm gonna record a quick demo as is, then clip the cap back together and record again..
Posted: Tue May 01, 2007 12:38 pm
by Mike
Nice!
I'm glad it sounds good mate - hopefully the clipped cap will make it more useable as a two channel amp for you.
Posted: Tue May 01, 2007 12:52 pm
by Doog
How long should I wait to get at the chasis again? I've had it turned "on" with the IEC cable taken out the mains to try and drain it or something..
Posted: Tue May 01, 2007 12:56 pm
by Mike
As long as you stay away from the big caps you're fine. just have one hand in your pocket.
if you're real paranoid you could use an insulated screwdriver across the power supply filter caps to discharge them.
I never bother though, I just turn straight off, no standby, take out the power lead and go to work, just be careful.
Posted: Tue May 01, 2007 1:31 pm
by Doog
Either I didn't solder the cap back properly or there's very little difference between modded and stock. I'm guessing the former due to the talk on the Marshall forum. Ah well, I'm sure it's an improvement..
Posted: Tue May 01, 2007 1:35 pm
by Mike
hahaha.. fair play
![Smile :)](./images/smilies/icon_smile.gif)
Posted: Tue May 01, 2007 2:54 pm
by Doog
NEKKID!
Posted: Tue May 01, 2007 2:57 pm
by Mike
lol...
I meant to mention, there were two guys with DSL50s at the gig on Friday, the cleans were good but when they stomped into the red channel it was WAYY trebly - I guess this is what they're on about in this thread - that a bright clean tone yields ice picky distortion?
Posted: Tue May 01, 2007 3:01 pm
by Doog
Yeah, and a bit of a drop out in low end. I tried resoldering the the cap one last time and sure I did it properly and there still wasn't really any noticable difference. Then I totally took the cap out and still no difference.
Bit of an odd one, wish I'd recorded before I even took the thing apart. Ah well.
Posted: Tue May 01, 2007 3:04 pm
by Mike
Hm. Well strange. There was talk of C12 and C13 in that thread - which did you do? Maybe it's the other one?
Regardless I think they're treble bleed caps and maybe the difference is higher up the gain dial? or lower down? I dunno.
Posted: Tue May 01, 2007 3:08 pm
by Doog
I took out C13. I was thinking of looking at C12 (maybe replacing it with a cap of a different value as diccussed on the forum), but I'd really want to take the input PCB out for de/soldering purposes should the effect of both caps removed be too drastic.
Gotta find a way to get the fuckin' dial off first though
![Mad :x](./images/smilies/icon_mad.gif)
Posted: Tue May 01, 2007 3:10 pm
by Mike
one of the pots is stuck on?