Hammarlund Super Pro

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The Hammarlund Manufacturing Company was founded by Oscar Hammarlund in New York City in 1910. The first Hammarlund plant manufactured radio components and was located on Fulton Street in lower Manhattan.. Their variable capacitor designs quickly became industry standards, and the company adopted the capacitorís schematic symbol as its logo. Hammarlund formed a partnership called Hammarlund-Roberts Co. in the mid 1920íspecifically to offer kits for AM Broadcast radios using Hammarlund parts.

Hammarlund-Roberts went out of business in 1931 and the Hammarlund Mfg. Co., Inc. introduced of the "Comet Pro", the first commercial shortwave superheterodyne receiver. Within five years, thousands of these receivers were in use at commercial radiotelegraph and radiotelephone stations, aboard ships and by amateur radio operators the world over.

After the Comet-Pro came an improved receiver, called the Super-Pro (the SP-200 series in 1936. Hammarlund expanded with the onset of World War II, with more than 2000 people employed at 14 different plants. It has been estimated that almost 90% of American wartime military electronic equipment employed Hammarlund capacitors. At the end of World War II, surplus Super-Pro receivers at bargain prices were readily available, which may be a reason why so many of these are still survive today.

In 1947, the SP-600 Super-Pro receiver, which surpassed the SP-200 in performance, was introduced. It covered 540 kHz to 54 mHz with a 0-100 calibrated mechanical band spreadand had provisions for optional crystal control of six selected frequencies. Also produced, was a VLF version, which tuned from 10 kHz to 540 kHz. The SP-600 receiver series was popular throughout the world for military, laboratory and commercial uses.

While Hammarlund was most famous for its amateur/short-wave receiver lines such as the Super Pro series and the HQ series (which includes the HQ-100, 110, 120, 129, 145, 150, 160, 170, 180, 200 and 215) it also produced a number of amateur transmitters. In 1960 the HX-500, a 100 watt, table-top, single-sideband transmitter was introduced.This rig also had FM and FSK transmission capability, along with the later HX-50. The HXL-1 was a compact linear amplifier introduced in 1964.

The company changed ownership often. In the late 1950s Hammarlund was sold to Telechrome. Then Telechrome sold out to Giannini Scientific. In the late 60ís the company was sold to the Electronic Assistance Corporation (EAC). The product line was either sold off in parts or phased out. The Cardwell Condenser Corporation purchased all remaining components, and in the early 1970s the Hammarlund factory closed. At the time of its demise, Hammarlund was among the very oldest producers of radio equipment in the United States.

More information on Hammarlund:
Wikipedia reference on Hammarlund
Ham Radio Museum - Hammarlund

Hammarlund Super Pro EBay Bargains!

Hammarlund Super Pro  Power Supply tube unit -  Pi
Hammarlund Super Pro Power Supply tube unit - Pi
Ends in 18 Hours 24 Minutes 57 Seconds
Current price: $195.00 (0 bids)
Vintage Hammarlund Super Pro -- Wiring Harness - p
Vintage Hammarlund Super Pro -- Wiring Harness - p
Ends in 1 Days 16 Hours 47 Minutes 32 Seconds
Current price: $27.50 (0 bids)
Vintage Hammarlund Super Pro -- FRONT PANEL - part
Vintage Hammarlund Super Pro -- FRONT PANEL - part
Ends in 1 Days 17 Hours 12 Minutes 36 Seconds
Current price: $55.50 (0 bids)
Vintage Hammarlund Super Pro -- 2 ORIGINAL KNOBS
Vintage Hammarlund Super Pro -- 2 ORIGINAL KNOBS
Ends in 1 Days 17 Hours 55 Minutes 45 Seconds
Current price: $27.50 (0 bids)
Vintage Hammarlund Super Pro -- 2 ORIGINAL KNOBS
Vintage Hammarlund Super Pro -- 2 ORIGINAL KNOBS
Ends in 1 Days 17 Hours 59 Minutes 58 Seconds
Current price: $27.50 (0 bids)
Vintage Hammarlund Super Pro -- 2 ORIGINAL KNOBS
Vintage Hammarlund Super Pro -- 2 ORIGINAL KNOBS
Ends in 1 Days 19 Hours 56 Minutes 21 Seconds
Current price: $17.50 (0 bids)
HAMMARLUND SUPER PRO - SP-400K BC-1004 RECEIVER -
HAMMARLUND SUPER PRO - SP-400K BC-1004 RECEIVER -
Ends in 3 Days 20 Hours 43 Minutes 16 Seconds
Current price: $99.95 (0 bids)
Vintage Hammarlund Super Pro -- TUNING KNOB WITH N
Vintage Hammarlund Super Pro -- TUNING KNOB WITH N
Ends in 6 Days 17 Hours 10 Minutes 3 Seconds
Current price: $37.50 (0 bids)
Vintage Hammarlund Super Pro -- TWO FRONT BEZELS -
Vintage Hammarlund Super Pro -- TWO FRONT BEZELS -
Ends in 6 Days 18 Hours 36 Minutes 43 Seconds
Current price: $32.50 (0 bids)
SSB Adapter for Hammarlund Super Pro SP-600
SSB Adapter for Hammarlund Super Pro SP-600
Ends in 6 Days 20 Hours 1 Minutes 31 Seconds
Current price: $105.39 (1 bid)
HAMMARLUND Super Pro SP-200 Series SP-200-X SP-200
HAMMARLUND Super Pro SP-200 Series SP-200-X SP-200
Ends in 10 Days 14 Hours 34 Minutes 17 Seconds
Current price: $8.90 (2 bids)
Vintage Hammarlund Super Pro --  Parts Lot  - Resi
Vintage Hammarlund Super Pro -- Parts Lot - Resi
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Current price: $57.50 (0 bids)
Rare Vintage Hammarlund Super Pro -- AUDIO GAIN CO
Rare Vintage Hammarlund Super Pro -- AUDIO GAIN CO
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Current price: $19.50 (0 bids)
Rare Vintage Hammarlund Super Pro -- PHONES JACK -
Rare Vintage Hammarlund Super Pro -- PHONES JACK -
Ends in 12 Days 15 Hours 44 Minutes 48 Seconds
Current price: $19.50 (0 bids)
Rare Vintage Hammarlund Super Pro -- CAPACITOR -
Rare Vintage Hammarlund Super Pro -- CAPACITOR -
Ends in 12 Days 15 Hours 51 Minutes 16 Seconds
Current price: $24.50 (0 bids)
Rare Vintage Hammarlund Super Pro -- AVC MANUAL TO
Rare Vintage Hammarlund Super Pro -- AVC MANUAL TO
Ends in 12 Days 16 Hours 26 Minutes 58 Seconds
Current price: $19.50 (0 bids)
Vintage Hammarlund Super Pro -- MAIN POWER TOGGLE
Vintage Hammarlund Super Pro -- MAIN POWER TOGGLE
Ends in 12 Days 22 Hours 45 Minutes 35 Seconds
Current price: $24.50 (0 bids)
Vintage Hammarlund Super Pro -  SENSITIVITY KNOB
Vintage Hammarlund Super Pro - SENSITIVITY KNOB
Ends in 12 Days 23 Hours 13 Minutes 41 Seconds
Current price: $14.50 (0 bids)
Vintage Hammarlund Super Pro -  4 LOT EBY TUBE SOC
Vintage Hammarlund Super Pro - 4 LOT EBY TUBE SOC
Ends in 13 Days 15 Hours 43 Minutes 22 Seconds
Current price: $19.50 (0 bids)
Vintage Hammarlund Super Pro -- A_B Type J Potenti
Vintage Hammarlund Super Pro -- A_B Type J Potenti
Ends in 13 Days 17 Hours 44 Minutes 37 Seconds
Current price: $12.50 (0 bids)
Vintage WW2 Hammarlund Super Pro Signal Corps Radi
Vintage WW2 Hammarlund Super Pro Signal Corps Radi
Ends in 13 Days 23 Hours 50 Minutes 30 Seconds
Current price: $325.00 (0 bids)
Rare Vintage Hammarlund Super Pro -- PHASING KNOB
Rare Vintage Hammarlund Super Pro -- PHASING KNOB
Ends in 14 Days 20 Hours 31 Seconds
Current price: $19.50 (0 bids)
Rare Vintage Hammarlund Super Pro -- METER  -  ham
Rare Vintage Hammarlund Super Pro -- METER - ham
Ends in 15 Days 19 Hours 29 Minutes 56 Seconds
Current price: $94.50 (0 bids)
Rare Vintage Hammarlund Super Pro -- TOP HANDLE LA
Rare Vintage Hammarlund Super Pro -- TOP HANDLE LA
Ends in 15 Days 20 Hours 23 Minutes 38 Seconds
Current price: $37.50 (0 bids)
Rare Vintage Hammarlund Super Pro -- ESCUTCHEON TR
Rare Vintage Hammarlund Super Pro -- ESCUTCHEON TR
Ends in 15 Days 21 Hours 28 Minutes 7 Seconds
Current price: $34.50 (0 bids)
Rare Vintage Hammarlund Super Pro -- BELLY OF THE
Rare Vintage Hammarlund Super Pro -- BELLY OF THE
Ends in 15 Days 21 Hours 53 Minutes 32 Seconds
Current price: $174.50 (0 bids)
HAMMARLUND Super Pro SP-400-SX / X Communications
HAMMARLUND Super Pro SP-400-SX / X Communications
Ends in 21 Days 2 Hours 58 Minutes 24 Seconds
Current price: $10.50 (0 bids)
Vintage HAMMARLUND Super Pro Radio in Cart As Is F
Vintage HAMMARLUND Super Pro Radio in Cart As Is F
Ends in 24 Days 17 Hours 12 Minutes 19 Seconds
Current price: $699.99 (0 bids)
Hammarlund Super Pro Power Supply tube unit
Hammarlund Super Pro Power Supply tube unit
Ends in 26 Days 17 Hours 53 Minutes 59 Seconds
Current price: $150.00 (0 bids)

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