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Hallicrafters S-72L

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Handheld Shortwave receiver

The Hallicrafters S-72L is the long wave version of Hallicrafters S-72. and the predecessor of the S-93.
The S-72 and S-72L differ only in frequency range. An early production variant featured a noise limiter which was controlled by a front-panel mounted toggle switch.

The S-72L contains eight tubes (seven 1-volt, one 3-volt) tubes and was designed for AC/DC (120 VAC or 90 VDC & 7.5 VDC batteries). Frequency coverage was from 170 to 400 kc, 540 to 1600 kc and 1.5 to 11.5 mc in four bands. The receiver featured a BFO for CW detection and passive AVC circuitry. Audio quality is excellent and abundant from either a 5-inch 4-ohm PM speaker or 2000 ohm headphone jack. Built-in loop antenna is used on 170 to 400 kc band. Telescopic antenna or external antenna used on BC and SW bands. Selectivity is good, sensitivity is excellent on BC and SW bands, fair-to-good on LF band after recent alignment and parts replacement (paper capacitors, bypass capacitors, electrolytic capacitors and fresh tubes).

The original Hallicrafters schematics are known to contain errors for this receiver. The Howard Sams Photofact version of the schematic appears to be the most correct.

Specifications
Type
Handheld Amateur HF Receiver 
Frequency range RX
0.170-0.4 / 0.54-11.5 MHz in four bands 
TX
Frequency stability
Tuning steps
Filters
Receiver
Modulations
AM / CW 
Sensitivity
Selectivity
Receiver system
Single conversion, 8 tubes 
IF-frequencies
455 kHz 
Image rejection
Audio output
Transmitter
Modulations
RF-output
Connections
Antenna
Built-in telescopic 
Impedance
Electrical
Power requirements
Mains (120 VAC) or batteries (90 & 7.5V DC) 
Current drain RX
TX
Physical
Dimensions (w×h×d)
356 × 355 × 305 mm (14.02 × 13.98 × 12.01 in) with the removable cover installed 
Weight
6.35 kg (14 lbs)  
Form factor
Handheld 
Manufactured
Between 1950 and 1952 in USA 
Other features
Memories
Usage
Amateur / Ham radio operators 
Manufacturer
Hallicrafters 
Model
S-72L
Features
BFO
Passive AVC 
Manuals, Diagrams and Brochures
 
None available  
 
 
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