BWD 112 Sine and Square Wave Generator

[GK]

Was recently gifted this. I managed to find the manual for the 112B model variant, which is fully transistorised, but I couldn't find any data (manual/schematic) or photos for this model on the internet at all, so here is the first internet reference. I spent a few hours this afternoon tracing the circuit out.

BWD was an Australian manufacturer. Not a lot of their stuff had tubes inside. This must have been amongst the first of their products. Anyway, it's a bog standard Wien Bridge sine oscillator with light bulb stabilisation. It's all tube apart from a Si transistor Schmitt trigger circuit which produces the squarewave output.

[tautech]

Drop Kevin a line, he's been very helpful when I've needed stuff.
http://www.kevinchant.com/bwd.html

[GK]

I'm sure if Kevin had a manual for the 112 it would be up on his site. I've nutted out the circuit anyway, so that has my needs sorted. This thing isn't exactly high-level technology. Thought this might elicit an admission of nostalgia or two. This generators first and previous home was Regency Park TAFE (SA). I recall one lab from the period I was there with a few of these all dusty like and unused stashed on a shelf in a corner. By then none of the test equipment on the benches had tubes inside, though old stuff could still be found sitting in cupboards; obviously some sitting for decades before finally being put out for disposal.
 
 

[radhaz]

Sure is a handsome beast.