K-20

Kolster; USA

Data
Forum
Pictures
Collections

  • Year
  • 1928
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 45673
    • Brand: International

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

 Technical Specifications

  • Number of Tubes
  • 7
  • Main principle
  • TRF without regeneration
  • Tuned circuits
  • 4 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Alternating Current supply (AC) / 110 Volt
  • Loudspeaker
  • - For headphones or amp.
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: K-20 - Kolster; USA
  • Shape
  • Tablemodel, with any shape - general.
  • Notes
  • One dial (primary tuning control knob)
  • Price in first year of sale
  • 135.00 $
  • External source of data
  • Ernst Erb
  • Circuit diagram reference
  • Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)

 Collections | Museums | Literature

Collections

The model K-20 is part of the collections of the following members.

 Forum

Forum contributions about this model: Kolster; USA: K-20

Threads: 1 | Posts: 2

Hi Folks,

I have a Kolster K-20 with a metal casting wheel on the tuning capacitor shaft. It's about 3 inches diameter to receive the dial cord and a tensioning spring. In this case the wheel has some fractures, but is still whole.

I'm wondering if I should apply a sealer or adhesive to this to help stabilize the metal before I attempt to apply the dial cord. Do you have a suggestion for such a material? The fractures are very fine, so a sealer would have to be low viscosity. I also hoped to perform this without dismantling the capacitor shaft. I'm not sure that dismantling is possible, but it would certainly take a lot of time and care.

 

Thanks for the help,

Bob Heimbueger

Robert Heimbueger, 25.Jan.11

Weitere Posts (2) zu diesem Thema.