|Year: 1969 ?||Type: Amateur-Receiver (amateur bands, may include broadcast bands)|
|Semiconductors (the count is only for transistors)||28:|
|Principle||Superhet, double/triple conversion; ZF/IF 5645/50 kHz|
|Wave bands||Broadcast, Long Wave and more than two Short Wave bands.|
|Power type and voltage||Alternating Current supply (AC) / 120/220 Volt|
|Loudspeaker||Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)|
|Power out||3 W (unknown quality)|
|from Radiomuseum.org||Model: SPR-4 - Drake, R.L. Miamisburg, Ohio|
|Shape||Tablemodel, with any shape - general.|
|Dimensions (WHD)||10.75 x 5.5 x 12.25 inch / 273 x 140 x 311 mm|
Double conversion, AM/CW/LSB/USB, preselector, notch filter.
1. SCC-4 Crystal Calibrator
2. 5-NB Noise Blanker
3. RY-4 Radio Teletype Adaptor
4. TA-4 Transceive Adaptor
Crystal tuned, each tuning a 500 kHz band. Factory supplied with 10 crystals, covering most broadcast bands. Adding optional 13 crystals provides 150 kHz - 30 MHz coverage.
|Net weight (2.2 lb = 1 kg)||8.2 kg / 18 lb 1 oz (18.062 lb)|
|Price in first year of sale||2,280.00 DM|
|Source of data||Shortwave Receivers - Past & Present; Fred Osterman, N8EKU|
Model page created by Martin Bösch. See "Data change" for further contributors.
All listed radios etc. from Drake, R.L. Miamisburg, Ohio
Here you find 149 models, 89 with images and 47 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.