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Discontinued - Linear Amplifier HL-700
(Circa 1960-1970 - No longer in production)
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Path: Home > Classic Transformers & Enclosures > Discontinued - Linear Amplifier HL-700

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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)


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URL: http://www.hammondmfg.com