AX-235 "Little Miracle"

Emerson Radio & Phonograph Corp.; New York, NY

Data
Forum
Pictures
Collections

  • Year
  • 1938/1939
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 70865
    • alternative name: Emerson Television

Click on the schematic thumbnail to request the schematic as a free document.

 Technical Specifications

  • Number of Tubes
  • 5
  • Main principle
  • Superheterodyne (common); ZF/IF 455 kHz
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • AC/DC-set / 105-125 Volt
  • Loudspeaker
  • Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 4 inch = 10.2 cm
  • Material
  • Catalin (a brand name for a thermosetting polymer popular in the 1930s and 1940s - a phenol formaldehyde resin - like Bakelite, but a two-stage process with a lot of work afterwards).
  • from Radiomuseum.org
  • Model: AX-235 "Little Miracle" - Emerson Radio & Phonograph
  • Shape
  • Tablemodel without push buttons, Mantel/Midget/Compact up to 14
  • Dimensions (WHD)
  • 226 x 143 x 96 mm / 8.9 x 5.6 x 3.8 inch
  • Notes

  • Selection of six Gem-like color combinations.
    Power Consumption: 45 W.
    Broadcast frequency range: 540 - 1.780 kHz.

     

  • Net weight (2.2 lb = 1 kg)
  • 2.2 kg / 4 lb 13.5 oz (4.846 lb)
  • Price in first year of sale
  • 17.95 $
  • Circuit diagram reference
  • Beitman Radio Diagrams Vol. 2, 1939
  • Literature/Schematics (3)
  • Emerson Folder Form. 39-22, 2-39 for 1939.

 Collections | Museums | Literature

Collections

The model AX-235 "Little Miracle" is part of the collections of the following members.

 Forum

Forum contributions about this model: Emerson Radio &: AX-235 "Little Miracle"

Threads: 1 | Posts: 8

I am currently restoring an example of one of these radios and I have already a fair amount of experience with Emersons. This one has me baffled at present!

The chassis is more or less as factory spec but the tuning coil T1 has been chopped about in the past probably to add LW to the bands. Im not even sure that the coil is correct however I have removed all the added parts and tried to rig up the coil as intended.

The rest of the chassis components appear to be OK and resistors etc seem to buz out fine. As I am in the UK and the sets were 110AC, the line cord (missing) had to be rewired. I do this by feeding 110VAC into the set but put a series 220R resistor in line with the heaters. This allows the HT to run plus also the LT. Im getting approx 5V across each tube heater. Little bit low but still OK.

The problem is that once powered up, the audio stage is good plus the 6Q7 stage but Im not getting any signal. Touching the caps if the 6A8 and 6K7 tubes produce a click but thats it. HT is running at 82V before the speaker field coil and 66V after. Im starting to wonder if I have a bad 6A8 but any help would be useful. What is the HT that I should get?

Attachments

Mark Andrews, 28.Feb.11

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