anyone knows some info?
suppose to emulate a dumble amp :lol:

Thanks! Very cool! 8)

I want to replace one of the pots in my Deluxe Reverb reissue amp with a push/pull pot so that I can switch the bright cap on or off. The only pot I have at home is a 250K audio pot from Alpha which would be a perfect replacement for the bass pot. The only problem that I can see is the power rating which is as 0.2w.

Will that be enough or do I need a pot+switch with a higher rating?

Interesting stuff. Never heard of these before.
I like the no-nonsense build style. :D

Looking to build a nice valve amp (anything up to about 15 watts? home use only..), but all the sites I can find are abroad and quite pricey.. especially with the GBP getting weaker...

The best place I've found so far is Tube Amp Doctor (Germany?), which isn't so bad as it's in the EU meaning no import tax - I think!?!

I like the look of their Fender Tweed kits, especially the 5E3, as it will be my first amp build, but I do like a challenge! but even this kit, with a speaker, will cost me...

Here's my 1st draft of the Matamp C7 schematic, traced from pictures I found on the net. The indicated component value are believed to be correct (read from the pics):
Matamp C7

A few interesting points:
_ the tonestack design is taken straight out of a Hiwatt Custom, although the identified values are different. This kind of tonestack isn't very efficient in a Hiwatt (at least the ones I have played including mine), but it is very powerful in Sound City amps.
_ the valve after the return of...

A Jensen P12R, mfg/date code 220735. The organ is old, and dating the pots in the amplifier leads me to believe that it's a 1957 manufacturing date. I bought the organ at a yard sale because it was chock full of tubes, all nice RCA, Tung Sol and Dumont 12AX7s (24 of them!). The amplifier uses a pair of 6V6GTs with a couple of 12AU7 a 6CU5 and something else on the chassis. I plan to use it for a low power head of some sort, probably along the lines of a tweed deluxe or something. Lots of...

Just got a quick q for those in the know...

what do you think: if I crank my amp to 10(max vol) and I add a boost pedal up front... am I going to get a louder output (on most amps?) or is it just going to distort more... ie am I guaranteed to be out of headroom at max volume?

Has anyone else played with this one? It's amazing! Punchy, full, and its overdrive is great.

Someone confirm.

I've got the Clubster 45 here. This guy wants me to add a gain-switch (that is originally on the panel in form of a push-pull) to the footswitch instead of the reverb switch. The footswitch is plastic and don't wanna break it. I can't see any lock or screws ... any ideas how to open the footswitch? I just wanna check out if i can simply remove the reverb and install the gain switch.

Hey guys, I am going to be building an amp soon and I am in the process of planning it out. I think I would like to put in an effects loop, but I had a quick question about it. I was thinking of having the send be activated by a switched jack after the tone controls, etc. but before the power amp section. The return would come back before the power amp section as well. Does this seem like it would work?

Also, I want to do some channel switching but not really channels, just bypassing a gain...

The rings that slide over your tubes to prevent vibrations.
has anyone ever used anything like this? any improvements or snake oil?

So I discovered the positive effect of having a filter choke in the power supply in the thread peavey nasties . Immidiately the question pops up, why not replace all resistors with chokes? The further down you go the less current is flowing and you could use smaller and cheaper inductors. Any comments on this? Might this be someting to try out in the next little SE custom build? Have it been done?

:hmmm:

Hi there
I have a Simms-Watts amp that was given to me as scrap. It was broken when I got it but a new EL34 and a new fuse got it up and running again. I have since then ripped out the awful sounding SS preamp and replaced it with a Dualrec-ish preamp. So far so good. Now I want to go into the output stage and first of all get a Choke in there. Now, when i look at the schem i notice that the screens are fed from the output transformer and not from the second stage in the PSU as it usually is....

have enyone build PushPullParalell tube amp?
for guitar.....

What, when, where, how, why, who?????? :)

Don't know if I can ask here as it's a stereo hi fi amp rather than a guitar amp, but I don't know where else to ask...

I've found these files to build an 2 x 8W valve (EL34/ECC82) amp, but the files are in French :roll:
Looks like a nice build, the site has links for .pdfs, but they seem to be broken, but the link to the .gif files still works - has schematics, pcb transfers, big article from a French document... I think it's all there

Wondering if anybody could shed some light on it, or...

I have the schematic, but my tube amp skillz are not up to par for doing amp layouts (yet). I've searched a few of the most likely places, but can't find any sort of layout for the Univalve.

Has anybody here built one from the schematic? Or has anyone seen a layout? Mr. Briggs? :mrgreen:

Thanks!

IF so do you know the neon/ldr combo?

O r where to get these parts to try my own. What specs and place please? Thanks

Ok, so Ive got an Ampeg R50H that runs on EL34's and I found out that all I need to do to switch it to 6L6's or KT88's is to rebias it.

I read through ( this site on how to bias an amp. And I want to just make sure I'm understanding everything correctly.

First I remove the ground from pin 8 (the cathode) of each power tube. I then insert a 1 Ohm resistor in place of the ground.

Then I turn the amp on, but leave it on standby, with NO tubes in it. Place the neg(black) lead from my DMM on the...

Sux that this was moved to guitar amps from the forum where I originally posted it. This amp is a FX pedal , really, and I used to use it as such in the FX loop of another amp... :?
When I loook at this picture:

I have to say that it doesn´t look like a pedal , it looks more like an amplifier - even when you only use the FX-part as an FX- unit . I doubt, that even you will push it with your feet, where the name pedal comes from ( ped estrian etc.)
The effects (chorus, flanger and delay) are...

Hey guys, I am looking into doing the Alembic F-2B preamp, but have a couple of questions about the schematic. It can be found at about 3/4 of the way down the main page under the date 07/30/02.

First, any idea what kind of transformer this is? I see the 6.3V tap, but I am more curious about the B+ side. Also, what kind of voltage rating should those power supply caps be? Finally, what kind of wattage should I be looking at for all of the resistors? This will be my first tube project (nice and...

I have 4 70's svt's I need to restore nd sell, and was wondering if theres a site out in this crazy dump truck of internets that shows details of restoring svt's, v-9's etc...

thanks :)