Vox - Treble-Bass Booster ( V8401 )

Discussion regarding early stompbox technology: 1960-1975 Please keep discussion focused and contribute what info you have...

Vox - Treble-Bass Booster ( V8401 )

Postby analogguru » 20 Jun 2008, 14:56

Here is FSB-birthday present No. 3, the very sought after:

Vox - Treble-Bass Booster ( V8401 ) schematic

Happy birthday FSB,
analogguru
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.
analogguru
Old Solderhand
 
Posts: 3285
Joined: 26 Jun 2007, 14:58
Has thanked: 0 time
Have thanks: 117 times

Re: Vox - Treble-Bass Booster ( V8401 )

Postby The Rotagilla » 20 Jun 2008, 15:54

Thanks! :applause:
The television will not be revolutionized.
User avatar
The Rotagilla
Diode Debunker
 
Posts: 732
Joined: 20 Aug 2007, 19:24
Has thanked: 6 times
Have thanks: 59 times

Re: Vox - Treble-Bass Booster ( V8401 )

Postby MoreCowbell » 20 Jun 2008, 16:42

Thanks !
MoreCowbell
Transistor Tuner
 
Posts: 1106
Joined: 06 Aug 2007, 15:39
Has thanked: 0 time
Have thanks: 11 times

Re: Vox - Treble-Bass Booster ( V8401 )

Postby soulsonic » 21 Jun 2008, 06:23

Good to see the correct schematic finally!
User avatar
soulsonic
Old Solderhand
 
Posts: 3531
Joined: 27 Jun 2007, 04:38
Location: Buffalo, NY
Has thanked: 56 times
Have thanks: 280 times

Re: Vox - Treble-Bass Booster ( V8401 )

Postby Ivana » 22 Jun 2008, 19:35

thanks!
Imho not so far from I guessed here http://www.freestompboxes.org/viewtopic ... oxes#15535
Ivana
 
Posts: 28
Joined: 08 Dec 2007, 10:37
Has thanked: 0 time
Have thanks: 0 time

Re: Vox - Treble-Bass Booster ( V8401 )

Postby JHS » 03 Jul 2008, 12:38

To me the wiring of the 100k at the trannieoutput w/o any decpoupling cap looks kinda strange.
Anyone got a clou why it's wired that way? Thank in advance...

JHS
JHS
Cap Cooler
 
Posts: 484
Joined: 14 Jul 2007, 12:20
Has thanked: 0 time
Have thanks: 3 times

Re: Vox - Treble-Bass Booster ( V8401 )

Postby analogguru » 03 Jul 2008, 13:14

With the 100k resistor the maximum collector voltage in this circuit is limited to 3V.

The V8401 had a predecessor.
I assume, that they took another circuit running on 3V ( maybe with a Ge-tranny) and "converted" it resulting in this circuit.

analogguru
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.
analogguru
Old Solderhand
 
Posts: 3285
Joined: 26 Jun 2007, 14:58
Has thanked: 0 time
Have thanks: 117 times


Return to Vintage Stompbox Corner ( ... - 1975)

Who is online

Users browsing this forum: No registered users and 12 guests