Emerson Radio Model 508.
Portable tube radio - superheterodyne. Made in the USA.
Date of manufacture of the receiver is not known, but it
is known that they have started to produce in 1946.
Dimensions 223 x 105 x 53 mm, weight without battery 1
kg. Plastic housing. Power is supplied by two batteries.
Filament - 1,5 v, - battery type D, the anode voltage -
67,5 V, - Eveready Battery type 467. Wiring is built on
four miniature vacuum tubes type 1R5, 1T4, 1S5, 3S4,
manufactured by Emerson. On the inside back cover
pasted leaflets. The receiver is activated when you open
the top cover. When you close the lid presses the rod
dip switch disconnects power to the receiver. Inside the
lid is a loop antenna. Under the lid is a decorative
grille, and the tuning knob and volume control. The receiver has
got me in good working condition.
For demonstration I use a modern battery 1,5 v such as D,
and a homemade battery anode collected from 8 to 9 v
batteries such as PP3.
Video review of radios,
Photos can be enlarged
The original b-battery Eveready 467 has
the dimensions 90 x 70 x 35 mm and weighs 340 grams.
The photo on the right home-made battery anode,
collected from 8 to 9 v battery type PP3
Homemade battery is made from the innards
8 batteries PP3