Superdyne 305 Upright Model

Superdyne 305; Tuska Co., C. D.; (ID = 2096180) Radio
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Superdyne 305; Tuska Co., C. D.; (ID = 2096180) Radio
Tuska Co., C. D.;: Superdyne 305 [Radio] ID = 2096180 1400x821
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For model Superdyne 305 Upright Model, Tuska Co., C. D.; Hartfort (CT):
1925 advertisement
Country:  United States of America (USA)
Manufacturer / Brand:  Tuska Co., C. D.; Hartfort (CT)
Year: 1925 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 4: UV201A UV201A UV201A UV201A
Main principle TRF with regeneration; 2 AF stage(s)
Wave bands Broadcast only (MW).
Power type and voltage Storage and/or dry batteries / 6, 45, 45 Volt
Loudspeaker Horn
Power out
from Model: Superdyne 305 [Upright Model] - Tuska Co., C. D.; Hartfort CT
Material Wooden case
Shape Console, Lowboy (legs < 50 %).
Dimensions (WHD) 26 x 42 x 16 inch / 660 x 1067 x 406 mm

Two dials (primary tuning control knobs)

Possibly the earliest true application of negative feedback in RF circuits was Tuska's Superdyne, which had an RF circuit with the familiar tickler coil upside down. In 1923, Tuska and Robert Miner developed a modification of the original regeneration circuit which was called the "Superdyne". The pair had the idea of reversing the regeneration to squelch oscillations in the circuit.

Price in first year of sale 275.00 $
External source of data Ernst Erb
Source of data Radio Collector`s Guide 1921-1932
Mentioned in Guide to Old Radios

All listed radios etc. from Tuska Co., C. D.; Hartfort (CT)
Here you find 19 models, 15 with images and 4 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.