FAL - Treble Booster Germanium

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

FAL - Treble Booster Germanium

Postby modman » 08 Apr 2017, 22:58

1 x NKT 216 Germanium transistor,
Different from this FAL Treble Boosters with 2 si transistor
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Re: FAL - Treble Booster Germanium

Postby pinkjimiphoton » 09 Apr 2017, 02:11

hey bro, i actually have the case from one of these and always wanted to fill it with the proper circuit.
any chance of a shot of the bottom of the board please?
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Re: FAL - Treble Booster Germanium

Postby Motter » 10 Apr 2017, 06:46

Based on the component values, it looks like it could be pretty similar to a Rangemaster. Biased with a 100k/330k divider to the base, 3k3 emitter, axial cap on the input and the tropical fish on the output. Still, no apparent volume control or bypass cap...
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Re: FAL - Treble Booster Germanium

Postby Motter » 10 Apr 2017, 06:51

On second thought, that 3k3 is probably on the collector, with the emitter straight to ground. About as simple as it gets...

https://en.m.wikipedia.org/wiki/Common_emitter
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Re: FAL - Treble Booster Germanium

Postby modman » 11 Apr 2017, 13:35

pinkjimiphoton wrote:hey bro, i actually have the case from one of these and always wanted to fill it with the proper circuit.
any chance of a shot of the bottom of the board please?

hi, these pictures were taken from a current Reverb auction, this is all I've got, sorry.
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