Dallas Arbiter - Wah Face  [schematic]

Discussion regarding early stompbox technology: 1960-1975 Please keep discussion focused and contribute what info you have...
Post Reply
User avatar
Professor SourTone
Solder Soldier
Information
Posts: 197
Joined: 08 Jan 2008, 09:07
Location: London
Has thanked: 5 times
Been thanked: 58 times

Post by Professor SourTone »

I got this in a trade and know nothing about it apart from the obvious. I don’t recognise the inductor from anything online. It has two BC109.
Attachments
8B9BFD9C-E1A3-4324-A7AC-734041E2E7D5.jpeg
8F081284-2E93-44E0-BC3B-6957D43377E7.jpeg
5F85B763-0167-4CEF-B476-DE0886754B17.jpeg
FA4E24C0-8B86-4C64-94A6-B714BEEB613B.jpeg
8FA5CC02-F2BA-4372-BBAF-1CCF41C17D6D.jpeg
02DEB816-78B4-4915-BA2B-24A8CE66E928.jpeg
918C462A-0E16-49A8-980B-448E01D41147.jpeg
7FD01263-E7DB-4642-95FA-BD5EB1E5559D.jpeg

User avatar
lolbou
Old Solderhand
Information
Posts: 2617
Joined: 18 Nov 2008, 21:38
Has thanked: 308 times
Been thanked: 225 times

Post by lolbou »

Is it like wah and fuzz in the same time, with the foot controlling both effects (one part of the pot for the wah freq, and the other for the fuzz tone or gain)?
- Are you a mod or a rocker?
- Uh, no, I'm a mocker.

User avatar
Professor SourTone
Solder Soldier
Information
Posts: 197
Joined: 08 Jan 2008, 09:07
Location: London
Has thanked: 5 times
Been thanked: 58 times

Post by Professor SourTone »

It’s a wah-volume. I’m now told it’s made by GEM, which is actually printed on the circuit board.

User avatar
Manfred
Tube Twister
Information
Posts: 1937
Joined: 04 Apr 2009, 23:42
Has thanked: 1671 times
Been thanked: 1344 times

Post by Manfred »

What are the Values of the yellow marked Components?
Missing Values.jpg

User avatar
Manfred
Tube Twister
Information
Posts: 1937
Joined: 04 Apr 2009, 23:42
Has thanked: 1671 times
Been thanked: 1344 times

Post by Manfred »

I found the resistor value on another shot with 100k and the value of the electolyte with 5uF on your fourth image.

User avatar
Manfred
Tube Twister
Information
Posts: 1937
Joined: 04 Apr 2009, 23:42
Has thanked: 1671 times
Been thanked: 1344 times

Post by Manfred »

I made this PCB-Clone and drew the schematic according the PCB.
Dallas Arbiter Wah Face PCB Layout.JPG
Ready-to-print PDF-files:
Dallas Arbiter Wah Face PCB Components Side.pdf
(9.54 KiB) Downloaded 76 times
Dallas Arbiter Wah Face PCB Solder Side.pdf
(4.23 KiB) Downloaded 79 times
SprintLayout6.0 file:
Dallas Arbiter Wah Face.zip
(11.13 KiB) Downloaded 79 times
Dallas Arbiter Wah Face Schematic.jpg
Last edited by Manfred on 30 Jan 2022, 22:45, edited 1 time in total.

User avatar
CheapPedalCollector
Resistor Ronker
Information
Posts: 399
Joined: 19 Oct 2020, 15:15
Has thanked: 452 times
Been thanked: 147 times

Post by CheapPedalCollector »

Q1 Emitter resistor is correct on the layout, but not in the schematic.

User avatar
Manfred
Tube Twister
Information
Posts: 1937
Joined: 04 Apr 2009, 23:42
Has thanked: 1671 times
Been thanked: 1344 times

Post by Manfred »

CheapPedalCollector wrote: 30 Jan 2022, 10:08 Q1 Emitter resistor is correct on the layout, but not in the schematic.
Thank you, I have fixed the error in the wiring diagram in the post above.

Post Reply