Greene Glasspak questions

[Ben N]

John:

The samples on your page sound amazing. I would love to just buy one, but while I think the price is fair, it is still more than I generally spend for an amp. If I were gigging I would consider it money well spent, but that isn't the case. Also, you have been pretty generous about sharing your expertise around here, including the Glasspak's mosfet clippers, and while I would not expect a schematic, I wonder if you could answer a couple of questions:

Is the Glasspak similar to your Screamer+, but with Mosfet/Ge clippers and other tweaks? Is the Boost setting an extra pot in the feedback loop, like the Screamer+, or an added stage? And any other goodies you might want to throw out there to DIY-land.

BTW, I don't feel that I or anyone else is "entitled" to any of this stuff, so if the answer is "no," that is absolutely cool. Doesn't hurt to ask, though.

Ben

[markm]

Curious about this.....what is it? 

[newbie builder]

http://www.greene-pedals.com/GEAD/glasspak.htm

[johngreene]

John:

Is the Glasspak similar to your Screamer+, but with Mosfet/Ge clippers and other tweaks? Is the Boost setting an extra pot in the feedback loop, like the Screamer+, or an added stage? And any other goodies you might want to throw out there to DIY-land.

Ben

The short answer is 'no' to your questions. Except that the 'boost' function is an additional stage. It really is a 'boost'.

It basically has 3 different types of clipper/distortion 'sections' if you will.

The tone control is almost the same as a tube screamer, I tried dozens of times to make it 'better' but it always killed the best part of its sound. So, once I sold a few I considered the design frozen and haven't changed it since. Getting close to 10 years now....

--john

[markm]

http://www.greene-pedals.com/GEAD/glasspak.htm

Ohhhhh!
Okay! 

[Ben N]

Except that the 'boost' function is an additional stage. It really is a 'boost'.

Before the clipping section, I take it.

It basically has 3 different types of clipper/distortion 'sections' if you will.

Now that is a tantalizing tidbit.

Thanks!

[johngreene]

Except that the 'boost' function is an additional stage. It really is a 'boost'.

Before the clipping section, I take it.

Yes.

and No. 

It basically has 3 different types of clipper/distortion 'sections' if you will.

Now that is a tantalizing tidbit.

Thanks!

np.

[Ben N]

The sound you are hearing is a head being scratched in a puzzled sort of way...

But ok, at some point I just have to try stuff, I guess.

[johngreene]

http://www.youtube.com/watch?v=5UNYj_M07po

Glasspak, Naylor amp, 1963 Strat.

--john