Hey Marcc, ,

'835' is probably the wiring guy's bundy number.

(I looked in my crystal ball for that one!).

Fred.

Actually if I get an oddball set and I record those. If I find that it is a badge engineered effort & fits someone else's circuit I will pencil the findable ones number on the inside of the chassis as well as record it in any notes on it.

The one item that grabs my attention is the ?coil/resistor? next to the power socket.
Appears to be in series with the green coloured capacitor fed from the output valve and then going to the speaker socket.
I can understand the cap being a top cut filter on the plate of the valve but why the ?coil/resistor? thing.
A mystery item, needs the circuit diagram to find out.

That's a nice laid out chassis, all those caps could be replaced and laid out neatly at right angles and straight.
I'll bet all the resistors are close in value and all the capacitors, except the mica's are as leaky as hell!

Its a nice set and great work on the cabinet.

Fred.

Well this radio is a real surprise. I did the mod to add a mp3 player/ CD and Bluetooth and it did not need a preamp. This radio sounds as good as any blutooth speaker. It's Loud ,It's clear and it's from 1937. I ran it for 4 hours today and it didn't skip a beat.

Reverse engineering is not all that difficult. Its just a straight out pain. Having had to do it several times, a hacked EMMCO being one of interest along with an STC chassis 59. That was an interesting one to sort out. I sent the resultant circuit to Kevin Chant & HRSA with a warning on it, as to how it was derived and what mods were made to allow for issues & a 5Kpot instead of 6K.

However, I normally start by doing a layout of the principal parts using an ancient AutoCAD. One can tale a punt on what is in the IF transformer initially, not withstanding, that you can find the missing parts inside them (had one of them recently, but had circuit.)

Then you play join the dots and colour makes life easier: Some sets did have a colour scheme. It would not be that difficult to trace out the PSU & audio. Then we could see where it is electrically? It could be part of a tone circuit or some form of RFC. Like many Plate Detectors went to the OP tube via a Radio Frequency Choke: Many OP valves are quite happy to amplify Radio Frequency and use it for destabilisation.

Marc

There is a control that turns what looks like a miniature tuning capacitor and it just continues to turn.

Well that control works well on shortwave. It seems to adjust the sensitivity in various parts of the band.

Photos uploaded to Post 19.

Thankyou kind sir. This radio now resides with a very proud young owner whom now enjoys blutooth and mp3 music as well as good old fashioned am radio.