Quote:
Originally Posted by ms660
I made a few treble boosters for guitarists in 1965, OC44 was the specified choice on the original schematic.....
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The first Rangemaster "treble boosters" used both OC44 and OC71.
Others, like the Hornby Skewes Treble Booster, used a 2N4061.
Both were produced in 1965.