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Hallicrafters SR-400A Cyclone III

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Desktop Shortwave Transceiver

The Hallicrafters SR-400A Cyclone III was the last of the SR-400 series transceivers. Improvements over the SR-400 include increased power output and a high efficiency cooling fan for the power amplifier.

Specifications
Type
Desktop Amateur HF Transceiver 
Frequency range RX
10-80 m 
TX
10-80 m 
Frequency stability
Tuning steps
Continuous 
Filters
Receiver
Modulations
CW / SSB 
Sensitivity
Selectivity
Receiver system
Double conversion superheterodyne, 20 tubes 
IF-frequencies
Image rejection
Audio output
Transmitter
Modulations
CW / SSB 
RF-output
SSB: 550 W (PEP input), CW: 175 W (input) 
Connections
Antenna
Impedance
50 Ω 
Electrical
Power requirements
Separate PSU 
Current drain RX
TX
Physical
Dimensions (w×h×d)
381 × 165 × 330 mm (15.00 × 6.50 × 12.99 in)  
Weight
9.98 kg (22 lbs)  
Form factor
Desktop 
Manufactured
Between 1969 and 1969 in USA 
Other features
Memories
Usage
Amateur / Ham radio operators 
Manufacturer
Hallicrafters 
Model
SR-400A Cyclone III
Features
R.I.T.
ALC
Notch and CW filter
6-pole XTAL lattice filter
Noise blanker
VOX 
Manuals, Diagrams and Brochures
 
None available  
 
 
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