Picked this up today, unfortunately missing the seven valves and no brand or model marked anywhere. Looks to be fairly early.

I need model, missing valve numbers, circuit etc.

This was mounted into a nice early gramophone cabinet on legs, all the gramophone parts are gone and the speaker is mounted where the horn was, holes drills into the front for the radio knobs/pots.

It's a classic early 30s radio. I couldn't even guess the brand though I do remember seeing that sort of dial scale on a console in the past, perhaps on a Stromberg Carlson. It reminds me of the speedo in a HG Holden.

You might find it harder than usual obtaining valves for it. They look like the British/European pin pattern. The friction tuning mechanism was quite popular at that time though and most 1930s Australian radios came with that.

Fire up the transformer and measure the heater voltage chain. That'll determine whether the valves are 6.3 or 2.5 volt types. (i.e: a 2A5 is a 2.5 volt version of a 42)

Will have to wait until I rewire, lots of badly perished rubber and one very leaky cap. Might just lift the output leads and measure at the tranny.

OK, I have taken some better photos, the voltages are on the mains transformer, this saves me alot of work right now:

240v AC in
700v centre tap 350 0 350
5V 2 A
2.5V 3A
2.5V 8A I guess filament

See pics
Mystery Chassis

I think I can identify most or all of the valves:

Is the output push-pull? If so, the two 4 pin valves second from the left are likely to be 45's. 45's are pretty hard to get these days, but I believe 2A3's are similar. The 3 valves with top caps next to the cans are likely to be 24A, 35 or 51, which have same pin out, except the 24A being a RF tetrode, the others being remote cut off RF pentodes.What about the 5 pin valve 4th to the left? Does that have a top cap? If it doesn't have a top cap I reckon it'd be a 27. If it does have a top cap, it'll be a 24A. The rectifier will be an 80.

This is not a definitive guide, but a good guess and the outcome would determined by the circuit layout, particularly around the output stage. Unless you can identify brand & model it is unlikely you'll find a circuit diagram especially for a radio of that vintage (early 30's). It might be a good idea to sketch out a diagram yourself. I'm not too technical especially when it comes to RF stuff, but I'm sure there are a few guys who visit this site that are.

But we are on the right track!

Cheers.

Thanks Monochrome625
I will sit down and sketch circuit when time permits, if anyone else can also help please reply here also, the more the better and we can all learn.
Peter

Peter.

I have sent you an email regarding your unknown chassis.

Cheers.