Hammond Mfg. - Discontinued - HF Linear Amplifier HL-700

Discontinued - Linear Amplifier HL-700
(Circa 1960-1970 - No longer in production)

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Features

BAND COVERAGE
- 75 Meter, 40 Meter, 20 Meter, 15 Meter & 10 Meter Amateur Bands
TUBE COMPLIMENT
- Choice of either (4) 811A Triodes or (4) 572-B Triodes
- Operated AB2 - Grounded Grid Service
MODE AND DUTY CYCLE
- SSB (700 Watts Input) - dependant on supply voltage.
- CW (700 Watts Input) - dependant on supply voltage.
DRIVE POWER
- 75-100 Watts
COOLING
- Forced Air
ALC
- None
TUNING
- Vernier tuning
- 0 - 100 dial skirt log for easy resetting
INPUT CIRCUIT
- Untuned
OUTPUT CIRCUIT
- Pi-Network
ANTENNA RELAY
- None (supplied externally) - amplifier is designed to follow an exciter
METERING
- (4) Simpson Meters
- High Voltage, Grid Current, Plate Current & Relative Output
FINISH
- Smooth Grey Baked Enamel

Downloads

Unfortunately, not much information on these amplifiers has survived the years.

We have been able to locate, scan and convert to PDF files, three schematics that came with the amplifer:

HL-700 Schematic (8 x 10) High res. - easy to read "on screen" or print - PDF File (503K)

HL-700 Power Supply Schematic - easy to read "on screen" or print - PDF File (394K)

HL-700 Power Supply Connections - easy to read "on screen" or print - PDF (397K)

Photos (to follow shortly)