Durham Electronics - Sex Drive  [traced]

General documentation, gut shot, schematic links, ongoing circuit tracing, deep thoughts ... all about boutique stompboxes.
Posts: 46
Joined: 10 May 2010, 19:33
Has thanked: 1 time
Been thanked: 35 times

Post by albru80 »

If you like vero...
Durham Sex Drive.png

User avatar
Cap Cooler
Posts: 479
Joined: 03 Mar 2009, 22:49
my favorite amplifier: my hughes and kettner blue 30r
Completed builds: 3 jcm 800 builds
4 vintage plexi builds
2 bogner ecstasy preamps [both for personal use]
10 marshall guvnor mods and builds
100 jungle kat boosts
too many penguin love's to count.
5 blues pearl purplexed
dozen tube screamer fulldrive whatever you call them variants

hell i can't type this long it will piss off people what can i say i have been doing mods on toyz appliances gear sex toyz computers and such for 27 years. i started when i was 6 taking stuff apart.
Location: cleveland tn
Has thanked: 6 times
Been thanked: 7 times

Post by ansil »

So basically it's another Tube Screamer?

User avatar
Solder Soldier
Posts: 208
Joined: 14 Sep 2012, 23:49
Has thanked: 78 times
Been thanked: 25 times

Post by jalmonsalmon »

ansil wrote:So basically it's another Tube Screamer?
what I am thinking too :slap:

Breadboard Brother
Posts: 85
Joined: 25 Oct 2008, 04:58
Been thanked: 4 times

Post by sugarinthegourd »

Reviving this old thread. Is this verified? Thought this pedal had buffered bypass but I'm not seeing that here.

User avatar
Posts: 5
Joined: 17 Jun 2017, 21:01
Location: Texas, US
Has thanked: 4 times
Been thanked: 1 time

Post by mauman »

Yes, I can verify this schematic and vero layout. The first version was true bypass, then Durham shifted to buffered bypass due to switch popping. This trace shows the true bypass version, you can mitigate the pop quite well with an input pull-down resistor (1M to 2.2M) to ground before R3, plus the Jack Orman LED soft turn-on mod (http://www.muzique.com/lab/led.htm ). Mike

Ben N
Resistor Ronker
Posts: 371
Joined: 12 Dec 2008, 04:34
my favorite amplifier: Ampeg J12D Jet
Location: Israel
Has thanked: 25 times
Been thanked: 16 times

Post by Ben N »

As drawn in Modman's schematic, the bypass is neither true nor buffered, but rather good old tone-sucky always-connected-to-the-input bypass.

Post Reply