low voltage hi gain tube pedal attemp #8,876,345

[zambo]

Sounds good man! I really like the 6au6 sound a LOT! How are you running that at 24 volts? If you could point me at a thread for that or something ( start a thread? ) that would be sweet. Its got a pretty unique sound. Nice pedal overall. Lots of boost for sure!Your playing sounds great! Sounds like you like a little Black Sabbath?

[iccaros]

I have to create one, I have not made the schematic yet, for voltage multiplication I have a basic max 1044 design, but using the 7660 http://www.intersil.com/en/products/power-management/isolated-power/charge-pumps/ICL7660.html as they are fine with 12v (or at least rated at 12v unlike the max1044)

It is basically a Valve master (Ricks term for a valve caster using configured more standard gain levels), with a 500R cathode resistor and a .01 bypass on the first stage, a 1K on second stage, and a .022 out. The control is a 500K pot between the first and second stage..

the 6au6 is basicly this, a lone wolf from https://sites.google.com/site/jonandersonmn/tubebooster
,

I am thinking of pulling the top grid to + 12v,  and to the control grid, changing the screen to a control grid.. but have not tried that yet..
This will may give a little more boost, at least it will according to the space charged tubes page http://www.junkbox.com/electronics/lowvoltagetubes.shtml

from the site
Avoid grid confusion! The first grid (the grid physically closest to the cathode; what in conventional tubing is called the control grid) should be tied to 12V. If you're using a conventional tetrode or pentode in space-charge mode, make sure you put 12V on the control grid, and use the screen grid as the control grid. Pentode suppressor grids are almost always tied internally to the tube cathode, but if the suppressor grid comes out separately to a pin, try putting 12V on the suppressor as well. This may allow greater gain in some circuits, as you have two grids accelerating electrons toward the weakly charged plate.

I will start my own thread,  I have started bread boarding yours last night.. so I may have it done here soon