Search found 257 matches

by Optical
Tue Mar 28, 2023 11:57 am
Forum: Amp Talk
Topic: JCM900 4102 opinions?
Replies: 52
Views: 10597

Re: JCM900 4102 opinions?

I've seen lots of 900s in use live, but it's usually a plug a pedal board into the fx return setup. Cant recall ever seeing someone use the preamp?
by Optical
Tue Mar 28, 2023 10:16 am
Forum: Amp Talk
Topic: JCM900 4102 opinions?
Replies: 52
Views: 10597

Re: JCM900 4102 opinions?

Come round to my place if you want to hear it for yourself. Play the 900 against a 800, 2000, Jose' and friedman and you'll be pretty clear on where it stands in the marshall tone lineup
by Optical
Mon Mar 27, 2023 12:17 pm
Forum: Amp Talk
Topic: JCM900 4102 opinions?
Replies: 52
Views: 10597

Re: JCM900 4102 opinions?

I have a 50W head and can frankly say it's one of the worst tones in my stable. yrmv
If it fits your budget, maybe look at running a BEOD pedal into the power amp or something. Would be a huge improvement
by Optical
Fri Mar 17, 2023 9:46 am
Forum: Wow!Rare!Collectible!!!!
Topic: Ready... Set... BUY BUY BUY!!!!
Replies: 39
Views: 12268

Re: Ready... Set... BUY BUY BUY!!!!

Arent these pedals just tube screamers with an active bass eq stage on the output?
I guess it wouldnt be the first time someone has asked a ridiculous price for a tube screamer
by Optical
Mon Mar 13, 2023 8:27 am
Forum: DIY - BUILD YOUR OWN Amps
Topic: Rockit Super Lead 130 (Mk6) - Lead Channel
Replies: 7
Views: 3483

Re: Rockit Super Lead 130 (Mk6) - Lead Channel

I've always been curious about these Rockit's given the visual similarities to the Mark series. Do the Rhythm tone controls affect the lead channel tone? The lead cct looks like it goes through that TL071, then into the two 7025 stages. That part of the circuit is all pretty standard stuff at least ...
by Optical
Fri Mar 10, 2023 12:50 pm
Forum: Amp Talk
Topic: Mesa Boogie Mk VII
Replies: 41
Views: 16900

Re: Mesa Boogie Mk VII

Capacitors have an operational life of 20 years or less in a hot environment. In a tube amp there's only a couple and they're big and easy to replace, but any a digital circuit environment they're just not designed to last that long Anyway, I like my Mark V, has the best cleans imo. For the lead cha...
by Optical
Fri Feb 17, 2023 8:58 am
Forum: DIY BUILD YOUR OWN - Pedals
Topic: NPD: 4 band gyrator drive unit
Replies: 31
Views: 9429

Re: NPD: 4 band gyrator drive unit

That's the basis of the mesa 5-band eq pedal and what they put in the mark amps. Certainly very musical
by Optical
Fri Jan 27, 2023 9:33 am
Forum: Tone and Style
Topic: Recommend me a reverse guitar pedal.
Replies: 21
Views: 7098

Re: Recommend me a reverse guitar pedal.

Avalanche run does a good job of it and has tap tempo.
Or a Line 6 M5/7/9/13 pedal will do it well too
by Optical
Wed Jan 25, 2023 11:52 am
Forum: Amp Talk
Topic: Mongrel cab
Replies: 9
Views: 2148

Re: Mongrel cab

I've seen a Rockit cab that looked just like that back in the day. Cant remember what it sounded like though.
by Optical
Wed Jan 18, 2023 1:46 pm
Forum: DIY - BUILD YOUR OWN Amps
Topic: Adding a gain stage
Replies: 21
Views: 4709

Re: Adding a gain stage

Agree with the pedal comments.
It doesnt look to be built in a way that would allow high gain imo, the component layout and wiring would have to be substantially revised to avoid whistling/oscillations.
by Optical
Sun Jan 01, 2023 6:56 pm
Forum: Amp Talk
Topic: NMAD SV20H
Replies: 64
Views: 10256

Re: NMAD SV20H

The 820R value is thicker/more bass/less treble shelving than the 2k7 but yeah I believe the 820R/680nf was featured in the early Marshalls with the split cathode arrangement before they went to the more common 2.7k/680nf arrangement. The 820R/680nf rolls off the lower frequencies from 285Hz downwa...
by Optical
Sun Jan 01, 2023 12:31 pm
Forum: Amp Talk
Topic: NMAD SV20H
Replies: 64
Views: 10256

Re: NMAD SV20H

FuzzMonkey wrote: Sun Jan 01, 2023 11:52 am
The cathode arrangement on the bright channel, if what I read was true, is a 820R resistor bypassed by a 680nf cap. This also will thin things out a bit more than the 2.7k/680nf arrangement.
The 820R value is thicker/more bass/less treble shelving than the 2k7 but yeah
by Optical
Wed Dec 28, 2022 8:27 am
Forum: DIY BUILD YOUR OWN - Pedals
Topic: TCE Fluorescence mod question
Replies: 21
Views: 5151

Re: TCE Fluorescence mod question

Possibly it could be modded to change the output volume but you'll need to know what the circuit is first. Gutshot?
by Optical
Thu Dec 22, 2022 8:32 am
Forum: DIY BUILD YOUR OWN - Guitars
Topic: Explorer / Strat hybrid
Replies: 11
Views: 3754

Re: Explorer / Strat hybrid

Not really, the CG of the guitar moves - see the LTD snakebite for example of one approach to figuring this out by shaping the back edge to move the button toward the bridge. Explorers are dicks with where the weight is centered. They'll dive or tip if you get it wrong
by Optical
Wed Dec 21, 2022 10:10 am
Forum: DIY BUILD YOUR OWN - Guitars
Topic: Explorer / Strat hybrid
Replies: 11
Views: 3754

Re: Explorer / Strat hybrid

I'm no physicist but wouldn't a very small change to the angle of the rear bout create a lot more leverage than adding mass to the upper horn? https://i.imgur.com/yZcC6OA.png Hmmmm, I guess I could try something like that. :think: thanks for the suggestion! :thumbup: The issue with that is the rear...