• Country
• United States of America (USA)

• Manufacturer / Brand
• Hammarlund Mfg. Co. Inc.; New York, NY

• Year
• 1934/1935 ??

• Category
• Commercial Receiver (may include amateur bands)

• Radiomuseum.org ID
• 44035

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Tubes
• 9

• Valves / Tubes
• 57 58 58 58 58 57 2A5 2B7 80

• Main principle
• Superheterodyne (common); ZF/IF 465 kHz; 1 AF stage(s)

• Wave bands
• Short Wave (SW only)

• Power type and voltage
• Alternating Current supply (AC)

• Loudspeaker
• - For headphones or amp.

• Material
• Metal case

• from Radiomuseum.org
• Model: Comet Pro [Var. 5 ] - Hammarlund Mfg. Co. Inc.; New

• Shape
• Tablemodel, low profile (big size).

• Notes

• The Hammarlund Comet Pro (Later model, Variation 5 according to Communicatioins Receivers by Moore) covers 1,5 to 20 MHz in four bands in  AM and CW (BFO).

  In contrast to earlier models, the AF output tube was changed to a  2A5, and a BFO knob, Crystal filter, and phasing control were added to the front panel.  Also, a new AVC tube (2B7) and AVC control were added.

• External source of data
• Ernst Erb

• Circuit diagram reference
• Rider's Perpetual, Volume 5 = ca. 1934 and before

• Mentioned in
• Communications Receivers (4th edition page 59)

• Literature/Schematics (1)
• ARRL 1934, Seite 62/63

• Other Models

• Here you find 145 models, 93 with images and 58 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Hammarlund Mfg. Co. Inc.; New York, NY