• Country
• Switzerland

• Manufacturer / Brand
• Trialmo AG, Zürich

• Year
• 1951/1952

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 13788

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

• Number of Tubes
• 7

• Valves / Tubes
• EF42 ECH42 EAF42 EAF42 EM34 EL41 AZ41

• Main principle
• Superhet with RF-stage; ZF/IF 470 kHz

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast, Long Wave and Short Wave.

• Power type and voltage
• Alternating Current supply (AC) / 110-250 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 21 cm = 8.3 inch

• Material
• Wooden case

• from Radiomuseum.org
• Model: Rahmenempfänger 255 - Trialmo AG, Zürich

• Shape
• Tablemodel, low profile (big size).

• Dimensions (WHD)
• 510 x 320 x 260 mm / 20.1 x 12.6 x 10.2 inch

• Notes

• Seitlich schwenkbare "Türe" mit Rahmenantenne für MW- und LW-Empfang.
  KW-Lupe.

• Price in first year of sale
• 630.00 SFr

• External source of data
• E. Erb 3-907007-36-0

• Source of data
• Radiokatalog Band 2, Ernst Erb

• Circuit diagram reference
• Die Tungsram-Tabellen führen das Modell auf.

• Mentioned in
• -- Original-techn. papers.

• Picture reference
• Das Modell ist im «Radiokatalog» (Erb) abgebildet.

• Other Models

• Here you find 15 models, 13 with images and 10 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Trialmo AG, Zürich