Little Jewel Radio

[Gridiron]

I wonder if anyone knows anything about this small radio found at the last RWB.
It is housed in a small cardboard box which might not be original and is built on a plastic panel which was made by J. Roberts, Radio Company (I assume, nothing to do with the well-known Roberts Radio). I traced the circuit, which uses a 1G6 battery octal double triode , which consists of a grid leak detector R-C coupled to an audio output stage. The valve is held in a Terry clip and seems to have slipped down from being held by the plastic base onto the glasss envelope, which pulled the top from the coil and broke some of the very thin coil wires, which I managed to repair.
The coil looks to be identical with an R.E.P. one shown in an advert in Practical Wireless Sept 1952 page 552, a LW,MW coil with reaction winding.
As found, the set only worked on Long Wave, in spite of the MW calibrations, it would work on MW if the LW coil section was shorted, and worked well with a 60 volt HT.
What battery would have been used with the 4 pin connector? probably a 1.4/67.5 volt type? I would think it would be difficult to fit it in the case.
Thanks for any relies, Mike.

[Paul_RK]

There's some discussion and a schematic in this thread:

https://www.vintage-radio.net/forum/showthread.php?t=66756

Would there be space for a 69V + 1.5V B114 battery? I can't think of any other readily available (once upon a time) possibilities.

https://www.radiomuseum.org/r/ever_b114.html

Paul

[Gridiron]

Thanks for the information, Paul, there would be just about enough space for a B114, though it would be a tight fit.
Strange that no LW/MW switch was provided, a 1 pole on/off switch would have been all that was required. possibly the 247 meter Light Programme was considered good enough at the time.
Mike.

[Ed_Dinning]

It looks a lot like the "cyclists 1 valver" from the 50's

Ed