|Year: 1947||Type: 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|
|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 . See "Data change" for further contributors.
All listed radios etc. from DuMont Labs, Allen B., Inc.
Here you find 194 models, 90 with images and 155 with schematics.