Hammarlund Four-20 Desktop Shortwave Transmitter

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The Four-20 is a crystal controlled CW transmitter. It uses an 807 in the final stage.

Frequency range

RX-range
-
TX-range
80-10 m
HAM bands
-
Stability
-
Tuning steps
-
Filters
-

Find the Hammarlund Four-20 on ebay

Receiver

Modulations
-
Sensitivity
-
Selectivity
-
Receiver system
XTAL
IF-frequencies
-
Image rejection
-
Audio output
-

Transmitter

Modulations
AM   CW  
RF-Output
20 W

Connections

Antenna
-
Impedance
50/600 Ω

Electrical

Power requirements
Mains
Current drain RX
-
TX
-

Physical

Dimensions (w×h×d)
-
Weight
-
Form factor
Base Station
Manufactured
Between 19xx and 19xx

Other features

Memories
-
Usage
Amateur / Ham radio operators
Features + options
-
Accessories
-

Manuals, diagrams and brochures

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Prices

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Price Condition Year User
USD Good / Used 2014 KF0AM
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