Search found 20 matches

by Bigwan
Fri Apr 10, 2015 12:55 pm
Forum: Technical Discussion
Topic: Ampeg B15 preamp: Drive balanced transformer from PI?
Replies: 2
Views: 919

Ampeg B15 preamp: Drive balanced transformer from PI?

I'd like to build a bass preamp for recording purposes. Loads of options, but the style of amp that appeals to me most is the Ampeg B15 portaflex/fliptop. A lot of info on the web suggests that much of the B15 "magic" happens in the phase inverter section. Any suggestions as to the best method of de...
by Bigwan
Tue Oct 16, 2012 10:49 am
Forum: Technical Discussion
Topic: Zinky Mofo schematic anyone?
Replies: 0
Views: 1230

Zinky Mofo schematic anyone?

Would any of you guys have the schematic for a Zinky Mofo? Just got one in for repair and they are as ugly inside as the internet pics. I'd like totry to narrow down the areas i need to degunk. ..
by Bigwan
Wed Oct 10, 2012 11:34 am
Forum: Dumble Discussion
Topic: Fuchs casinoline boost... Not PAB?
Replies: 7
Views: 1472

Re: Fuchs casinoline boost... Not PAB?

Yeah, I know the PAB is good for some people, but one guy that played the d'lite I built wasn't so keen on loosing the stack. Funny you mention the tail resistor - just after I posted this I was looking at a Bluesmaster schematic and noted a switched 72k tail resistor used there. The pot idea is a g...
by Bigwan
Tue Oct 09, 2012 8:44 pm
Forum: Dumble Discussion
Topic: Fuchs casinoline boost... Not PAB?
Replies: 7
Views: 1472

Fuchs casinoline boost... Not PAB?

Stumbled on this the other day while investigating low watt power sections. The fuchs 4 aces has a boost that doesn't work like the standard Dumble pab in that the tone stack is still connected. Anyone care to suggest how it's being done? My first thought was switching cathode bypass cap values...
by Bigwan
Tue Oct 09, 2012 4:08 pm
Forum: Dumble Discussion
Topic: Fuchs casinoline boost... Not PAB?
Replies: 4
Views: 827

Fuchs casinoline boost... Not PAB?

Stumbled on this the other day while investigating low watt power sections. The fuchs 4 aces has a boost that doesn't work like the standard Dumble pab in that the tone stack is still connected. Anyone care to suggest how it's being done? My first thought was switching cathode bypass cap values...
by Bigwan
Tue Oct 09, 2012 12:47 pm
Forum: Dumble Discussion
Topic: Fuchs casinoline boost... Not PAB?
Replies: 0
Views: 875

Fuchs casinoline boost... Not PAB?

Stumbled on this the other day while investigating low watt power sections. The fuchs 4 aces has a boost that doesn't work like the standard Dumble pab in that the tone stack is still connected. Anyone care to suggest how it's being done? My first thought was switching cathode bypass cap values...
by Bigwan
Tue Sep 27, 2011 7:50 am
Forum: Technical Discussion
Topic: Carmen Ghia schematic/layout?
Replies: 101
Views: 44105

Re: Carmen Ghia schematic/layout?

Is the Carmen Ghia schematic still floating around?

iancoulter24@gmail.com
by Bigwan
Tue Aug 16, 2011 12:09 pm
Forum: Technical Discussion
Topic: What to do with this old Marshall/Peavey...
Replies: 2
Views: 1017

Re: What to do with this old Marshall/Peavey...

If you figure out the intermittent problem you could sell it for around $500. You could get 2 or 3 decent donor amps for that much. Not around here in the current climate... £250/$400 tops, but i take your point. I also have a Peavey Encore 65 combo - same question. What would you build with it? Th...
by Bigwan
Tue Aug 16, 2011 10:14 am
Forum: Technical Discussion
Topic: What to do with this old Marshall/Peavey...
Replies: 2
Views: 1017

What to do with this old Marshall/Peavey...

I recently acquired a Marshall JCM900 SL-X 50 watt head in a non-funtional state. It cost me next to nothing, I spent a short time getting it up and running, but I really don't care for how it sounds and there's still an intermittent crackling fault somewhere. As it stands I wouldn't want to sell it...
by Bigwan
Tue Jun 21, 2011 12:07 pm
Forum: Dumble Discussion
Topic: UK chassis supplier?
Replies: 7
Views: 904

Re: UK chassis supplier?

Hi Mike,

Not looking a totally custom chassis, but one that'd fit the bill for a d'lite build. Some of your Marshall clone chassis could be pretty close, only needing a few extra holes drilled. I'll chuck an email your direction shortly.

Cheers

Ian
by Bigwan
Tue Jun 21, 2011 7:37 am
Forum: Dumble Discussion
Topic: UK chassis supplier?
Replies: 7
Views: 904

Re: UK chassis supplier?

Sorry Rog I'm looking one ready to rock (pre-drilled with faceplates). Thanks for the offer though!

No worries Gary! We'll get there in the end!
by Bigwan
Mon Jun 20, 2011 7:37 am
Forum: Dumble Discussion
Topic: UK chassis supplier?
Replies: 7
Views: 904

Re: UK chassis supplier?

Great! I've seen his chassis for sale but didn't know he did custom layout work. Thanks for that!
by Bigwan
Sun Jun 19, 2011 6:58 pm
Forum: Dumble Discussion
Topic: UK chassis supplier?
Replies: 7
Views: 904

UK chassis supplier?

Anyone know where i could get a chassis for a d'lite in the uk. Preferably one that's pre-drilled with the correct control configuration and tube complement!
by Bigwan
Mon Mar 14, 2011 9:08 am
Forum: Dumble Discussion
Topic: mesa studio 22 with eq
Replies: 7
Views: 969

Re: mesa studio 22 with eq

jestaudio wrote:the scratch build is far more than a mere mortal living in the uk can affaord at the moment :)
You might be pleasantly surprised. I'm half way through a scratch build at the minute (6L6 D'lite - all parts now purchased) and it's working out cheaper than I was expecting.
by Bigwan
Mon Dec 18, 2006 4:37 pm
Forum: Dumble Discussion
Topic: Progress report on D'Lite chassis
Replies: 41
Views: 5311

...

I'm onboard! Paypal payment sent!

Looking forward to getting my greasy mits on this kit!