• Year
  • 1941
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 67770
    • alternative name: Chicago Radio Lab

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

 Technical Specifications

  • Number of Tubes
  • 6
  • Main principle
  • Superhet with RF-stage; ZF/IF 455 kHz
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Line / Batteries (any type) / 117; 90 & 9 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 5.5 inch = 14 cm
  • Material
  • Leather / canvas / plastic - over other material
  • from Radiomuseum.org
  • Model: 6G501F Ch=6A19 - Zenith Radio Corp.; Chicago,
  • Shape
  • Portable set > 8 inch (also usable without mains)
  • Dimensions (WHD)
  • 381 x 249 x 178 mm / 15 x 9.8 x 7 inch
  • Net weight (2.2 lb = 1 kg)
  • 6 kg / 13 lb 3.5 oz (13.216 lb)
  • Price in first year of sale
  • 29.95 USD
  • External source of data
  • Ernst Erb
  • Circuit diagram reference
  • Rider's Perpetual, Volume 12 = ca. 1941 and before

 Collections | Museums | Literature

 Forum

Forum contributions about this model: Zenith Radio Corp.;: 6G501F Ch=6A19

Threads: 1 | Posts: 7

 Please be easy on me, this is my first radio post!

   I have rebuilt a Zenith 6g501f. It functions perfectly on battery (actually quite outstanding), but on AC, it appears to have poor sensitivity to the point that the ACG runs the gain up and generates a lot of noise. There's no real hum and the power supply voltages look good - although the filament string voltage is noticeably lower on AC. The alignment also looks very good and the dial tracks remarkably well, far better than any of my transoceanics.

    My first thought was that my wall voltage was low, but no, it's right between 116.5-117. The B+ looks good at 85-86V, the filament supply is around 7.9V. Checking the individual tube filaments, they are all around 1.35V (and ~2.8 on the 3q5g) which is very close to specification. I have fiddled with the power resistors and when I raise the filament to ~9 (essentially the same as on battery) it seems to get slightly better, but the required power resistors are down around 850 ohms (vice 1006 ohms per the schematic). I know from Transoceanics that the filament voltage can dramatically effect the performance but I am surprised that the standard voltages seem to result in such poor performance. I have tried several different sets of tubes, some NOS, with essentially no difference in the results. Does anyone in this august body have any better ideas?

    Brett

Brett Buck, 06.Jan.11

Weitere Posts (7) zu diesem Thema.