[NOTE - This post also contains details of the Fulltone Soul Bender]
|Vox Tone Bender Mark III|
Introduced in 1968 the Sola Sound Tone Bender MKIII is the last in the line up of the classic Tone Bender circuits. It produces a more mellow, less aggressive fuzz than the MKI & MKII Tone Bender circuits. Once again it uses a 3 transistor design but the structure is significantly different to previous incarnations of the Tone Bender. As you can see below the Tone Bender MKIII came in various guises:
|Sola Sound Tone Bender MKIII|
|Colorsound Tone Bender MKIII|
|Another Sola Sound unit|
|Sola Sound Tone Bender MKIII Gutshot|
Here's the schematic for the most widely distributed version of the Sola Sound Tone Bender MKIII:
Here's a vero layout created by Electric Warrior (Note - he used a 250K Volume pot):
And here's some images of his completed build:
And here's some info regarding the Fulltone Soul Bender:
"Our Soul-Bender is based on the legendary Colorsound and Vox Series III ToneBenders made by Sola-Sound/England in the late '60's that was used by Beck and Page on much of their circa 1968-70 recordings.
Equipped with 3 gain-matched germanium transistor for a FAT, searing lead tone, I also made the Tone control response and range more usable and much less shrill sounding... Full clockwise is SMOOTH sounding.
The Soul-Bender cleans up when you back-off on the guitar's volume control. This pedal has tons of tonal character and even harmonics and of course, true bypass w/ LED is included with every one."
And a vero layout for the "Boutique Bender":
For more info on the Sola Sound Tone Bender MKIII check out Effects Database here: http://www.effectsdatabase.com/model/solasound/tonebender/mk3
And here's the Freestompboxes.org forum topic: http://www.freestompboxes.org/viewtopic.php?f=19&t=7728