Really cool projects (this and jcm800)
The only thing that worries me is it's costs.
Looks like at such high voltage these projects could cost close to real tube versions...

I have an MT-2 as well. Not that I'm using it - it's just taking space in the corner. About a year ago I was really curious if I could make it usefull. Changed elektrolytics to metal film, changed opamps to opa2134 (this was the hardes part because original were SIP, while opa's are DIP). overall - it got better but is stilll pretty useless pedal.

I'm looking for amp head enclosure blueprints. Marshall style.

Does anyone have drawings of a guitar amp head?

Quote from: J M Fahey on October 26, 2010, 03:39:19 PM

QuoteI can get 6P14P (russian el84) dirt cheap here (for about 2$ a piece)

*Very* interesting, can you provide any links?
Thanks.

No links, sorry. I live in Latvia, which used to be in USSR, so we have plenty of russian stuff here at local flea market. It is not easy to get 50 of them, but if you only a few it's easy.
12AX7 substitutes (6n2p) ar about 1-2$ but they're less fun because the pinout differs and there is no 12.6V heater possibility while 6p14p ->EL84 substitution is "plug and play".


melvin - thanks for sharing your expirience, I will try to google some more on this

Quote from: bry melvin on October 25, 2010, 04:48:47 PM
instead of an attenuator....take a look at Yellow Jacket adapters... (or tone bones) They take 6l6 and replace with el84

They work...with no internal mods necessary.

This is a nice idea, but the price is silly for just a piece of ceramic (there is no circuitry inside right?)
I might try to build it my self. I can get 6P14P (russian el84) dirt cheap here (for about 2$ a piece)

to phatt:
I will try to persuade my friend to pull the tubes out. Who knows, maybe he will listen to me.
100W for rock/blues is 4 times overkill I think. That dude plays metal (still 100W is overkill. but you know - sometimes look and feel is more important).
I use 100W diy tube amp for playing something like post metal and I never found the head to be too powerfull. But than again - tastes differ. We are not here to judge but to try to help

Thanx for your replies!
Sometimes pulling out tubes is not an option (in case of a stubborn guitar player - not me)
My main need is to get a nice tone for playing gigs.

100W tube head.
I guess actual power is bigger than that because of the signal clipping

Hi!
I'm looking for an adjustable tube amp power attenuator build. The problem is - I can't find any adjustable attenuator schematic.
May be some of you guys have seen them somewhere...
Thanx.

Let's see if I'll be able to hunt down the vinyl marker.
Meanwhile here's another stompbox - this time no color finish because pedal it self took too much time. It's a lovetone meatball clone based un McMeat layout.

Quote from: stchristopher on July 28, 2010, 02:53:46 AM
No, I can't find the link either. If anyone has it...

I guess it's just Dr Boogey schematic for the drive channel. I'm wondering if the clean channel is the same circuit ommiting two of the jfet amplifier stages.

Quote from: trialabc on July 26, 2010, 04:09:01 AM
Well, thanks for the suggestion, but that chip is just too expensive....

I think I will make it using MCU by myself in case that I have time to develop. Just wanna ask one thing more, what is the difference of Reverb and Echo? They seems to be the same....

It is easy to make a reverb sounding algorythm, but it is hard to make it good sounding. I myself wanted to create an infinite reverb DIY pedal. I started by playing around in MATLAB. The result was quite... I'm looking for the right words. Well it was a reverb, but it sounded awful. Don't forget that I had MATLAB running on a PC having the computing power much better than an MCU. I'm not trying to persuade you not to try, I'm just warning you that it's not gonna be easy.
I've set it off for a while cause I'm a little busy right now. I think I ' ll try later again
Well, let us now how you're doing

Quote from: J M Fahey on July 25, 2010, 07:12:03 AM
Very good, congratulations.
And that "all black" finish ( unusual on pedals) creates a very special mood.

Thanx.
I would like to add white descriptions for pots, but I haven't figured out a way to do it yet

OK, I'm a newbie in this forum but here are two of my projects:
1)orange squeezer
2)colorsound overdriver (2channel mod)



my allmost finished (except the enclosure) orange rockerverb 50:

I would recommend to use the FV-1 chip manufactured by http://www.spinsemi.com/
Really easy to apply in a SS schematic without a real reverb tank/spring/plate.
It includes ADC, uC and DAC in one chip. Has an internal ROM memory with reverb code already in it, but has the opportunity to add external ROM with your onw effect code.
It is not cheap (about 20 euros in europe I guess), but it's really a nice single chip solution to your problem.
I think tonepad has a reverb pedal based on this chip.
In europe it can be bought in www.banzaimusic.com - some other places as well I guess.
Hope this helps.