German miniature receiver with 2 x RV12P2000

Valves

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Single-cicuit receiver

In post-war Germany, many radio tubes were no longer available. Books appeared with schedules based on the still available RV12P2000 Wehrmacht tubes. These tubes were also used as substitutes for the VCL1 tube used in the Volksempfänger (see figures right), as replacements for steel tubes and for making "Notradios", but also for the construction of miniature radios, such as this one.
This very compact miniature radio in Bakelite cabinet was probably made in Germany around 1946. It is equipped with two RV12P2000 tubes and a selenium rectifier. The meticulous chassis design and workmanship suggest that little device was made entirely by hand.
All around a fairly heavy speaker, the edge of which had to be cut to size in order to let it fit in the small cabinet, a chassis plate is arranged, on which the rest of the components are secured. With a lot of measuring this only just succeeded.
The three electrolitic capacitors needed to be replaced, as they either leaked or lost their capacity. They could be replaced by new capacitors in their original casing.

Data

Valves

Serial nummer:	none
Dimensions (w×h×d):	15.7 × 13.4 × 9 cm
Voltages:	110 or 220 volts ~
Made in:	±1946
Purchased in:	2015
Sold in:	2022
Weight:	1.8 kg

	Click on a valve for more information
	Circuit

What was broadcast in 1946?

Listen to "Ich nenne alle Frauen Baby" by The Cherokees, with Hans Bardeleben (vo,g), Kuddel Richter (b), Wolfgang Dresen (acc), Jo Balk (p), recorded in 1946

Back with back panel

Two metal ornaments are attached to the top of the Bakelite cabinet

The back of the chassis

The compact design is evident here: on the left, two tube holders for the RV12P2000 tubes and a coil can. Below and above the speaker two smoothing capacitors are visible. On the left, the mains transformer and the output transformer, separated by a selenium rectifier. Underneath is a small mounting plate with antenna, two power sockets and ground.

The top of the chassis

In order to make everything fit, the speaker had to be cut to size at the top and bottom. Therefore the cone had to be refitted. All of the components are located around the cone of the loudspeaker, the resistors, the capacitors, the two valve holders, the two smoothing capacitors, the mains transformer, the selenium rectifier, the coil can and the output transformer.

Bottom of the chassis

The tuning capacitor and the feedback capacitor, the output transformer, a smoothing capacitor and the coil can are visible here.

Right of the chassis

On top the two tube holders and the coil can.