|Year: 1968–1975||Type: Pre-stage (adaptor for SW/FM/VHF/UHF incl. built-in), Frequency converter|
|Semiconductors (the count is only for transistors)||2:|
|Principle||RF Converter/Adapter (not voltage converter); ZF/IF 1500 kHz|
|Tuned circuits||3 AM circuit(s)|
|Wave bands||Wave Bands given in the notes.|
|Power type and voltage||Storage and/or dry batteries / 9 Volt|
|Loudspeaker||- For headphones or amp.|
|from Radiomuseum.org||Model: Tunaverter 1450 - Tompkins Radio Products;|
|Shape||Very small Portable or Pocket-Set (Handheld) < 8 inch.|
|Dimensions (WHD)||115 x 60 x 100 mm / 4.5 x 2.4 x 3.9 inch|
|Notes||The leaflet shows 7 models for different frequency ranges. The VHF radio converter models are 273 (26.9-30 MHz = CB-10), 308 (30-38 MHz), 375 (37-50 MHz), 504 (49.5-54.5 MHz = 6 M), 1450 (144-150 MHz = 2 M), 1828 Air Craft Model (118-128 MHz) and 1564 (150-164 MHz).
The sales outlet for Tompkins Radio Products (TRP) is Herbert Salch & Co., Woodsboro, Texas.
There is no connection with the receiver. The output is coupled via a short wire or resonate antenna, for instance with a coupling Loop 2.5 " in diameter fo #20 to 32 enamel wire C = 240 mmfd L = 18 turns for 1500 KC output or L = 34 turns for 830 KC output or L = 52 turns for 550 KC output.
All VHF Tunaverters have a 3 section tuning capacitor. They were sold over several years - end date not known for sure.
|Price in first year of sale||30.00 $|
|Mentioned in||-- Original-techn. papers.|
Model page created by Ernst Erb. See "Data change" for further contributors.
All listed radios etc. from Tompkins Radio Products; Refugio Texas
Here you find 9 models, 2 with images and 7 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.