Hammarlund Four-20

Desktop Shortwave Transmitter

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Front view (Image by LA5KI) - Submitted by elmer

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

General characteristics

HAM bands: 80m 40m 20m 15m 10m
Frequency stability: ?
Tuning steps: ?
Memories: ?

Transmitter

TX-range: 80-10 m
Modulations: AM CW
RF-output: 20 W

Connections

Antenna: -
Impedance: 50/600 Ω
Other: -

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

Usage: Amateur / Ham radio operators
Features + options: -
Accessories: -
RigReference ID: 2833
MPN: HAMMARLUND-FOUR-000020

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Manuals, diagrams and brochures

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New and second-hand prices

Estimating the value of a rig can be challenging. We collect prices paid by real hams over the years to help you estimate the value of a used Hammarlund Four-20. Just bought or sold this model? Let us know what you traded it for and help other ham operators!

Based on similar Transmitter equipment, the estimated value of the Hammarlund Four-20 is around:

USD 128 ~ USD 239

This estimate is based on similar equipment and may not reflect the exact value of this model.

These estimates are based on the following prices:

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