23-12-2023, 11:02 AM
I've been on a bit of a roll fixing test gear and decided to get out my old audio sig-gen. Ive had it for a long time, it came from the local army surplus store (Eley's) in around 1970. it has a manufacturing date of 1961 on it.
I've botched a couple of repairs over its life, a new zener diode and some additional capacitors patched onto the existing ones. Today i've just noticed the waveform is a bit distorted and its not very well calibrated either.
The problem is that I have no information about it. There is a bank of eight locking preset resistors which look a bit tempting to fiddle with ( I should know better )
Its built in a sturdy sealed case and can operate from mains or internal battery. The case is aluminium. A cover screws down over the front with room for the detachable mains cable.
I'd like to have the confidence of a reading a schematic before diving in. it would be a pain to reverse engineer it.
Doe anybody have any idea where I could find out about it please?
Kind regards, David.
I've botched a couple of repairs over its life, a new zener diode and some additional capacitors patched onto the existing ones. Today i've just noticed the waveform is a bit distorted and its not very well calibrated either.
The problem is that I have no information about it. There is a bank of eight locking preset resistors which look a bit tempting to fiddle with ( I should know better )
Its built in a sturdy sealed case and can operate from mains or internal battery. The case is aluminium. A cover screws down over the front with room for the detachable mains cable.
I'd like to have the confidence of a reading a schematic before diving in. it would be a pain to reverse engineer it.
Doe anybody have any idea where I could find out about it please?
Kind regards, David.
