The top of the cabinet was divided into two separate hinged sections. Raising the right side revealed the AM radio tuner — with illuminated dial, and dark brown Bakelite knobs. Under the wider, left side, the turntable was accessible. I spent quite a few afternoons and early evenings laying on the dining-room floor listening to various types of music — admiring the colorful record labels. I would focus my gaze on the small red pilot lamp at the base of the console as the sounds drifted through the room. I have a photograph of this set, but need to un-earth it from the archives.
Capacitors, Resistors and Schematics for Tube Radios / Electronics
Davidson Every shop needs a well regulated variable voltage power supply for bench top work. This is a link to one of Bill Bowden's wonderful pages. Some use a door laid flat across some saw horses as a start. Building a real sturdy workbench out of two by four lumber is better.
These early receivers have a PW-D micrometer dial that has a bluish-gray Index dial and an inner Number dial that is red with white numerals. The matching loudspeaker is the early style cabinet with a 10" Rola K electrodynamic speaker only available for the production. History of the Design and Production Many radio engineers of the thirties firmly believed that the absolute best sensitivity and stability of a communication receiver's RF amplifier, First Detector and Local Oscillator could only be achieved by using "plug-in" coils. This type of approach eliminated problems of lead length, shielding and stability along with isolation of unused tuned circuits - problems that were commonly found in broadcast receivers using conventional rotary bandswitches. Plug-in coils were a hassle, no doubt.
The origins of radio communications are in the 19th century. At the beginning of our century, e. As the radio telephony services became more popular, the insufficient availability of radio frequencies became obvious.