"Superheated SHO" - asbestos gloves warning!

[WGTP]

Built this SHO/Mu/Srpp on my breadboard and it rocks.  

[bluebunny]

Me too - built mine a couple of weeks ago.  It's quite loud, which is a Very Good Thing^TM.  Now with my tame guitarist, along with an appropriate health warning.  Not sure about "hot" and "superheated".  More like "wild" and "completely insane".   

[frequencycentral]

Two years old this very day!

-Between version 1 (crackle ok) and 2 (no crackle), why the change in values for the drain resistor and source potentiometer?

I don't use 5.1k. The source pot was a 'Fuzzface lift'.

-Why the inclusion of the 22K input resistor on your layout? It's not on the schematics.

guitarpcb.com sold that version for a while and wanted the 22k to reduce noise. 

I hope I can tame this beast down to usable levels, because from what little playing I got to do with it, the sound was fantastic.

A few people have added an output volume control.

So, reducing the size of the potentiometer from 5k to 1k in the crackle-less version changes the gain of the BS170 from unity to something like +20db?

I'll try going to the 5k pot to tame the beast.

Still curious about why you made those changes Rick!

Not sure about "hot" and "superheated".  More like "wild" and "completely insane".   

That was entirely my intention. 

[bluebunny]

Two years old this very day!

Happy Birthday!

A few people have added an output volume control.

Why on earth...??

Not sure about "hot" and "superheated".  More like "wild" and "completely insane".   

That was entirely my intention. 

Jolly good.  Just checking... 

[rankot]

Just built this and it is not working (or I am wrong about how it shall work) - normal mode works fine, but when I turn to "Superheated" almost no sound gets out. Tried to switch 2N5457 to J201 and it works the same.

Am I missing something?

[rankot]

I found out what was the problem - the switch was not working

However, I managed to add "superheat" potentiometer and I will post that schematic soon.

[rankot]

Here is the schematic with added "Superheat" pot, it controls distortion.

https://www.dropbox.com/s/qgsx9vn5vh6zwjm/Super%20Heated%20SHO.jpg?dl=0

[rankot]

Finally, Tynipic processed the image:

[davepedals]

Can't get this to load, sure would like to see it... Anybody?


Quote from: frequencycentral on July 30, 2010, 06:26:48 AM<blockquote>Here's a layout for the now re-christened Red Dwarf Boost, the PCB is available from guitarpcb.com: http://www.guitarpcb.com/apps/webstore/products/show/1656920

This is the crackle-less version, with the addition of a 1M pulldown. There's a soundclip at guitarpcb.com too.



</blockquote>