|Year: 1947||Category: Television- and Radio Receiver, perh. also + Rec. etc. (TV Radio)|
|Valves / Tubes||28: 6J6 6AK5 6J6 6AG5 6AG5 6AG5 6AL5 6AC7 12JP4 6AU6 6AU6 6AL5 6SJ7 6V6GT 6AL7GT 6SN7GT 6SJ7 6AL5 6K6GT 6SN7GT 6SN7GT 6AC7 6BG6G 1B3GT 5V4G 5U4G 5U4G 6AL5|
|Main principle||Super-Heterodyne (Super in general); ZF/IF 26400 21900 kHz|
|Wave bands||Wave Bands given in the notes.|
|Power type and voltage||Alternating Current supply (AC) / 105-129 Volt|
|Loudspeaker||Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 6 inch = 15.2 cm|
|from Radiomuseum.org||Model: Chatham "Doghouse" RA-103 - DuMont Labs, Allen B., Inc.|
|Shape||Tablemodel, with any shape - general.|
|Dimensions (WHD)||23.5 x 17 x 19.75 inch / 597 x 432 x 502 mm|
|Notes||The DuMont RA-103 series of televisions (or "Telesets" as DuMont called them) are popular with collectors because of their high quality electrical design and interesting cabinets. All RA-103 models have a 12 inch round CRT and a continuous tuner with a triple roller inductor that covers the VHF low, FM radio, and VHF high bands in one continuous range (44-216 MHz). The tuner is a Mallory "Inductuner" and was referred to as an "Inputuner" by DuMont.
Early versions of the RA-103 had a 6U5GT or 6G5GT tuning eye (according to Rider TV vol. 1), but most sets found today have a 6AL7GT tuning eye as original equipment.
The first models of the RA-103 family were introduced in 1947. The RA-103 Chatham, a mahogany table model with an unusual trapezoidal shape (nicknamed the "Doghouse") seems to be the most commonly found today. The RA-103 Stratford is a table model with doors (see Rider TV vol. 1). The RA-103 Meadowbrook is a mahogany console with no doors, the CRT in the upper left, and a 10-inch speaker center bottom. The RA-103 Savoy is a larger mahogany AM/FM/TV/Phono console with doors, having the CRT top center, AM tuning dial on the left, FM/TV tuning dial on the right, speaker bottom left, and phonograph bottom right. The Rider TV index also lists an RA-103 Sutton, but no further information about this model is available.
The series was updated at some point with the RA-103C Savoy (same cabinet as RA-103 Savoy) and the RA-103C Winthrop (similar to Savoy, but with knotty pine cabinet).
In 1949, the RA-103D series was introduced, with significant circuitry changes and some different tubes. The RA-103D Rumson is a mahogany table model with a rectangular profile and a square tuner window (prior to the RA-103D models, the TV/FM tuning windows were round). There are also two consoles, the RA-103D Sheffield and RA-103D Canterbury, both of which are known to be consoles because of their 10-inch speakers documented in Rider TV vols. 3 and 4. The RA-103D chassis is very similar to the chassis used in the RA-104A Hastings and RA-110A Wellington sets, which had 15-inch and 19-inch CRTs, respectively.
|Net weight (2.2 lb = 1 kg)||84 lb (84 lb 0 oz) / 38.136 kg|
|Price in first year of sale||445.00 $|
|Circuit diagram reference||Photofact Folder, Howard W. SAMS|
|Mentioned in||(US) Radio & Television Retailing Dec. 1947|
|Literature/Schematics (1)||Rider TV vol. 1-58; SAMS set 90 folder 3|
Model page created by a member from A. See "Data change" for further contributors.
All listed radios etc. from DuMont Labs, Allen B., Inc.
Here you find 217 models, 111 with images and 176 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.