Levell R.C. Oscillator (Type TG200DMP)

[John Robson]

I have a faulty Levell R.C Oscillator (Type TG200DMP), and would like
to get it working. Does anybody know were I can obtain a circuit
diagram for this instrument.

I have attached a picture of the oscillator.

JR

[radioman]

Hello John,
I have scanned the full manual for you - enjoy

Andy

[Pamphonica]

I just checked the manual I have for my my TG200DM, and it is a slightly earlier vintage, with a few small differences in the circuit diagram and components.
A scan is attached in case yours is this version. The clue may be the use of 1S44 diodes in p[lace of the later 1N4001/1N4148.
However, it probably pre-dates your posh DMP version as it has no mention of fine frequency control.
All the best
Jezzer3

[John Robson]

I bought it when I was a student a few year back, and I remember it cost
around £20 at the time, so hardly posh. It has served me well until recently
when it stopped working. So this weekend I will have a play with it.

I will print off the manual and circuits diagrams and see which circuit diagram
is most suitable.

I tried looking up Levell Electronics, which is a company I know little about
and sadly they seem to have long since closed.

JR

[Stockden]

John,

I've attached a PDF copy of the manual in case that's easier for you to deal with. Levell were still marketing stuff until comparatively recently but, as you say, seem to have vanished.

Hugh