1055W/3D

Grundig (Radio-Vertrieb, RVF, Radiowerke)

Data
Forum
Pictures
Collections

  • Year
  • 1955/1956
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 2078
    • alternative name: Grundig Portugal || Grundig USA / Lextronix

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

 Technical Specifications

  • Number of Tubes
  • 6
  • Main principle
  • Superheterodyne (common); ZF/IF 468/10700 kHz
  • Tuned circuits
  • 6 AM circuit(s)     8 FM circuit(s)
  • Wave bands
  • Broadcast, Long Wave and FM or UHF.
  • Power type and voltage
  • Alternating Current supply (AC) / 110; 125; 160; 220 Volt
  • Loudspeaker
  • 2 Loudspeakers
  • Power out
  • 3 W (unknown quality)
  • Material
  • Bakelite case
  • from Radiomuseum.org
  • Model: 1055W/3D - Grundig Radio-Vertrieb, RVF,
  • Shape
  • Tablemodel with Push Buttons.
  • Dimensions (WHD)
  • 525 x 335 x 220 mm / 20.7 x 13.2 x 8.7 inch
  • Notes

  • Grundig 1055W/3D verwendet auch bei AM additive Mischung. Siehe auch die Exportversion Majestic 1055 USA mit abweichender Röhrenbestückung und multiplikativer AM-Mischung (ECH81).

    Laut Angabe auf der Rückwand besitzt das Modell 10 FM- und 7 AM-Kreise. Tatsächlich sind gemäss üblicher Zählweise (ohne Sperr- bzw. Saugkreise) laut Schema nur 8 FM- und 6 AM-Kreise vorhanden.

  • Net weight (2.2 lb = 1 kg)
  • 6.6 kg / 14 lb 8.6 oz (14.537 lb)
  • Price in first year of sale
  • 226.00 DM
  • Literature/Schematics (1)
  • -- Original-techn. papers.
  • Picture reference
  • Das Modell ist im «Radiokatalog» (Erb) abgebildet.

 Collections | Museums | Literature

Collections

The model is part of the collections of the following members.

 Forum

Forum contributions about this model: Grundig Radio-: 1055W/3D

Threads: 1 | Posts: 5

Forum Friends,

I have a minor question about the designation of the mixing process in the MW and LW bands of the Grundig 1055. The RF signal is applied to the control grid of EF89 pentode mixer, and the local oscillator voltage from the EC92 Local Oscillator triode drives the cathode of the EF89 pentode mixer.

This process was described as additive mixing in this thread.

This thread is in German, I used Google-Translate to read it.

My informal understanding of additive mixing means that the RF signal and local oscillator are linearly added together before being applied to the non-linear mixing device. This is the case in this radio in the FM band, with the self-oscillating EC92 triode converter.

It seems to me that this Radio uses multiplicative mixing in the MW and LW bands, but I am not sure about my understanding of the additive-vs.-multiplicative nomenclature.

Best regards,

-Joe

Joe Sousa, 15.Jun.09

Weitere Posts (5) zu diesem Thema.