Ekeradio Pocket F-M set and tuner

Ekeradio Electronic Developments; Pasadena CA

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  • Year
  • 1951–1955
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 322332

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

 Technical Specifications

  • Number of Tubes
  • 1
  • Main principle
  • TRF (Tuned-Radio-Frequency but use of regeneration unknown)
  • Wave bands
  • Broadcast (MW) and Tropical/Marine/Police Band(s) = 150-200m.
  • Power type and voltage
  • Dry Batteries / 1,5 & 30 Volt
  • Loudspeaker
  • - only for Earphone!
  • Material
  • Plastics (no bakelite or catalin)
  • from Radiomuseum.org
  • Model: Ekeradio Pocket F-M set and tuner - Ekeradio Electronic
  • Shape
  • Very small Portable or Pocket-Set (Handheld) < 8 inch.
  • Dimensions (WHD)
  • 4.5 x 2.75 x 1 inch / 114 x 70 x 25 mm
  • Notes

  • At least in 1954 Ekeradio offered a "beginners kit" transistor radio, a two band 8-oz. battery, transistorized Ekeradio, a transistorized custom F-M Ekeradio and a Transistorized "All wave Band Radio".

    This Pocket F-M set and tuner:
    It uses a subminiature tube only. Receives a range of 87.6 to 108.7 Mc, then including the channel 5 TV sound.

    The drawing of this Ekeradio Pocket F-M set and tuner is October 5, 1951. The "Thimble Set" was sold as a kit but Ekeradio wrote "there will be no kits or plans for this set". The designer was Glen Ecker, the owner of Ekeradio. 

    Offered was a "special High Frequency FM tube" called "Ekeradio" either for 60 (for $ 5.95) or for 30 (for $ 6.50) plate voltage. The midget tuning condenser U.H.F is for 2.7 to 15 Mmf. An Eveready "B" battery No. 413E or 507E for 30 volts (two in series for 60 volts) had to be carried outside the set. An "A" battery No. 935, size "C" for 1.5 volts was placed inside the set. The RF coil is winded with a 14 inches #26 enameled wire and soldered after 3 turns of the FM-tank coil.

    A plan was included to build a two-stage amplifier with the popular 722 and 107 transistor. We have to know that at that time FM was not reachable by transistors, at the beginning not even short wave.

  • Author
  • Model page created by Ernst Erb. See "Data change" for further contributors.

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