Retro Channel - The Fuzz

KHELSTROM · Post by **KHELSTROM** » 06 May 2011, 00:02

Just stumbled across this on the web. It appears to stabilize the effect of temperature on the transistors via a "proprietary circuit". Any guesses as to what's going on here?

Hides-His-Eyes · Post by **Hides-His-Eyes** » 06 May 2011, 00:05

Probably uses Hollis' autobiasing circuit

Greg · Post by **Greg** » 06 May 2011, 00:21

Is it Germanium ?
It doesn't actually say it is.. not I can see anyway.

ckyvick · Post by **ckyvick** » 06 May 2011, 06:17

SI bender?
https://i419.photobucket.com/albums/pp2 ... derRDV.jpg

KHELSTROM · Post by **KHELSTROM** » 06 May 2011, 17:02

The fact that they use the term "proprietary circuit" leads me to assume it's more than just using SI transistors.

sinner · Post by **sinner** » 06 May 2011, 17:30

If this is something unique, then I'm a teletubbie

But indeed - sounds shaggy

sinner · Post by **sinner** » 06 May 2011, 17:34

$180? at least it's prized right. I think I know what's my wifes next birthday present. She can be little bit mad, as she can't play guitar, but intension matters!

KHELSTROM · Post by **KHELSTROM** » 06 May 2011, 17:44

Hides-His-Eyes wrote:Probably uses Hollis' autobiasing circuit

You mean this? looks interresting, I'll have to try it out.

Hides-His-Eyes · Post by **Hides-His-Eyes** » 06 May 2011, 19:16

That's the one. It's really fucking clever.

ckyvick · Post by **ckyvick** » 07 May 2011, 05:28

KHELSTROM wrote:The fact that they use the term "proprietary circuit" leads me to assume it's more than just using SI transistors.

Yeah but the op wanted a mkii bender that isn't affected by temperature changes so he could just build the si version

sinner · Post by **sinner** » 07 May 2011, 06:51

ckyvick wrote:
KHELSTROM wrote:The fact that they use the term "proprietary circuit" leads me to assume it's more than just using SI transistors.
Yeah but the op wanted a mkii bender that isn't affected by temperature changes so he could just build the si version

It is Si

http://www.thegearpage.net/board/showth ... p?t=865609

Q - Hi Lance does it have Ge old stock transistors or Silicon or hybrid? thanks

A - silicon...
We do our magic
Proprietary

stuff to make it all good...

RnFR · Post by **RnFR** » 14 May 2011, 05:36

and you thought it was Hollis-esque.

kaludjerko · Post by **kaludjerko** » 31 May 2011, 15:22

Might be a bit like poker-face design from our friend aquataur

Low gain Si transistors -> similar sound to Ge
Pre- and post- buffers, carefully designed not to ruin FF response

here's the link:

http://user.eduhi.at/aquataur/aquataur/ ... heory.html

fosnal1950 · Post by **fosnal1950** » 31 May 2011, 15:56

Document contains no data !

Is there another link ?

kaludjerko · Post by **kaludjerko** » 31 May 2011, 23:32

fosnal1950 wrote:Document contains no data !

Is there another link ?

Works for me, but let's try once more:

http://user.eduhi.at/aquataur/aquataur/ ... heory.html

or go to his (aquataur, he/she is user on this forum, link to his page is also in his profile) page:

http://user.eduhi.at/aquataur/aquataur/index.html

has some quite interesting articles.

hope it works now.

Ripdivot · Post by **Ripdivot** » 12 Jun 2011, 23:05

Anyone buy one of these yet, I would love to know what they are doing!

RnFR · Post by **RnFR** » 08 Jul 2011, 16:32

so they really got some fuzz chips made?? doesn't that cost a fortune? why would you bother to do something like that other than for use as a marketing tool? ease of construction I could see, but if they are getting it all assembled smd anyway, what's the point?

oh yeah, to stop people from reverse engineering it and finding out it's most likely a Si fuzz face.

Chugs · Post by **Chugs** » 08 Jul 2011, 17:39

Maybe they used a CA 3046? They are a NPN transistor array with 14 pins.

KHELSTROM · Post by **KHELSTROM** » 08 Jul 2011, 17:59

RnFR wrote:so they really got some fuzz chips made?? doesn't that cost a fortune? why would you bother to do something like that other than for use as a marketing tool? ease of construction I could see, but if they are getting it all assembled smd anyway, what's the point?

oh yeah, to stop people from reverse engineering it and finding out it's most likely a Si fuzz face.

I doubt they're"fuzz chips". Probably just a matched transistor array in a SO-14 package.
Prob. like one of these:
(the ones I reference are DIP-14 packages good for us diy'ers)

4 Matched PNP, hfe 75
http://www.mouser.com/ProductDetail/THA ... 2bi5wyo%3D
or
2 Matched NPN hfe 100, 2 Matched PNP hfe 75
http://www.mouser.com/ProductDetail/THA ... kVYQ%3d%3d

These are made by "That Corp." http://www.thatcorp.com/THAT_IC_Products.shtml. It was founded by Les Tyler and Gary Hebert who both formerly worked for DBX, I know atleast one of them is a guitar player and gear head too. They actually make alot of cool audio IC's, stuff like VCA's, preamps, line drivers, line recievers. A lot of big names use their stuff too. I believe the Seymour Duncan compressor is based around one of their VCA's and DBX uses their stuff too. I actually work about 5 min from their headquarters so I stopped by about 5 months ago and got a bag of free samples. After reading about the matched transistor arrays and noticing their nice low gains I immediately thought about using them for fuzz experiments. Haven't gotten around to it yet, been really busy working on other people's gear, but hopefully I'll have time soon. Can't wait to see the pics from ibodog2 and figure this one out and verify.

mcaviel · Post by **mcaviel** » 10 Jul 2011, 16:56

this is so retro! like in the old days right

Retro Channel - The Fuzz [traced]