12AX7

[zpyder]

I realized last night that I have an unused, 5 year old 12AX7 collecting dust at my house... it came from a Fender Hot Rod Deluxe that was stolen from me years back.

Anyone know of any schematics that could utilize this tube?

cheers,
zpyder

[Seljer]

Most of the tube based distortions/overdrive that are around use regular 12AX7s, the Shaka Tube or the Tube Driver or the Real McTube. (I believe the first 2 only run on low voltages fed by 12VAC. The McTube has got another transformer that turns the 12V back up a hundred and something for use with the tubes)

[ildar]

I've been kicking around the idea of building a tube-based pedal, but really want a higher-voltage circuit. However, I'm leery of tubes because of the potential rip-yourself-a-new-one factor. What is the safety/difficulty level of the McTube?

[JimRayden]

Most of the tube based distortions/overdrive that are around use regular 12AX7s, the Shaka Tube or the Tube Driver or the Real McTube. (I believe the first 2 only run on low voltages fed by 12VAC. The McTube has got another transformer that turns the 12V back up a hundred and something for use with the tubes)

The latter two also don't sound too good. The Tube Driver doesn't overdrive the tube itself but instead uses opamps for this and uses the tube for "warming up" the signal in the end of the chain. At 12V. Real Mctube, although at high voltage, is just a fuzzy-sounding circuit. It can be modded into a pretty decent overdrive though (search the ax84.com forums). Shaka tube, according to the clips I've heard is an excellent sounding circuit which runs at 24V, which is what I'd like to call semi-starved plate design.

From the above three, I'd choose the Shaka. Just go and listen to the clips at the schematic section. Sweet.

--------------
Jimbo

[JimRayden]

If you dare, you might also try the Marshall preamp project:

http://www.hoffmanamps.com/projects/tube_box.htm
http://www.hoffmanamps.com/projects/images/TubePedalSchematic.gif

The sound clips (somewhere in that quite extensive webpage) are pretty darn good.

-----------
Jimbo

[puretube]

these "H*ffm*n boxes look cute!   

doesn`t/didn`t Aron sell these, too?
as well as those toroidals?

...

[The Tone God]

If you are will to get another 12AX7 you can build a Bullitt. Nice boaster and tremolo. /self-promotion

Andrew

[andy123]

Hi,

Are there any clips of the bullitt anywhere? the search didn't show any....

Cheers
Andy

[The Tone God]

Are there any clips of the bullitt anywhere? the search didn't show any....

No I didn't do any and I don't know if anyone else has. I'll try to do a few the next time I'm doing samples.

Andrew

[aron]

doesn`t/didn`t Aron sell these, too?
as well as those toroidals?

yes, I still have both if anyone wants.

Aron

[boogietube]

The wickedest project that I've seen is this one:

It's the Shaka Tube in a Hammond box project on this site:
http://diyguitarist.com/

This guy kicks butt!!
Sean