Hammarlund SP-600

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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 SP-600 EBay Bargains!

4  Vintage Hammarlund SP 600 Ham Radio Coils/ Tra
4  Vintage Hammarlund SP 600 Ham Radio Coils/ Tra
Ends in 1 Days 13 Hours 57 Minutes 38 Seconds
Current price: $39.99 (0 bids)
HAMMARLUND  SP-600  TUBE  KIT
HAMMARLUND SP-600 TUBE KIT
Ends in 2 Days 22 Hours 48 Minutes 37 Seconds
Current price: $129.00 (55 bids)
 Vintage Hammarlund SP-600 HAM Receiver front  LED
Vintage Hammarlund SP-600 HAM Receiver front LED
Ends in 3 Days 16 Hours 3 Minutes 42 Seconds
Current price: $21.99 (1 bid)
HAMMARLUND SP-600 JX-1 FIRST ISSUE RECEIVER SIGNAL
HAMMARLUND SP-600 JX-1 FIRST ISSUE RECEIVER SIGNAL
Ends in 9 Days 22 Hours 57 Minutes 51 Seconds
Current price: $7.95 (0 bids)
Four Manual Set  Hammarlund SP-600 Series Radios
Four Manual Set Hammarlund SP-600 Series Radios
Ends in 10 Days 11 Hours 7 Minutes 57 Seconds
Current price: $21.95 (0 bids)
Hammarlund SP-600 JX21A Operation & Service Ma
Hammarlund SP-600 JX21A Operation & Service Ma
Ends in 11 Days 8 Hours 47 Minutes 47 Seconds
Current price: $14.95 (1 bid)
LOT VACUUM TUBES HAMMARLUND SP-600 JX-16 HAM VINTA
LOT VACUUM TUBES HAMMARLUND SP-600 JX-16 HAM VINTA
Ends in 11 Days 12 Hours 2 Minutes 27 Seconds
Current price: $168.21 (0 bids)
For parts TRANSFORMER HAMMARLUND SP-600 JX-16 HAM
For parts TRANSFORMER HAMMARLUND SP-600 JX-16 HAM
Ends in 11 Days 12 Hours 5 Minutes 20 Seconds
Current price: $105.91 (0 bids)
FILTER CHOKE HAMMARLUND SP-600 JX-16 HAM VINTAGE R
FILTER CHOKE HAMMARLUND SP-600 JX-16 HAM VINTAGE R
Ends in 11 Days 12 Hours 5 Minutes 23 Seconds
Current price: $105.91 (0 bids)
FILTER CHOKE HAMMARLUND SP-600 JX-16 HAM VINTAGE R
FILTER CHOKE HAMMARLUND SP-600 JX-16 HAM VINTAGE R
Ends in 11 Days 12 Hours 5 Minutes 48 Seconds
Current price: $105.91 (0 bids)
Hammarlund SP-600 Overhaul Manual Reprint
Hammarlund SP-600 Overhaul Manual Reprint
Ends in 11 Days 19 Hours 52 Minutes 32 Seconds
Current price: $9.95 (0 bids)
COMPONENT BLILEY CRYSTAL VX4 HAMMARLUND SP-600 VIN
COMPONENT BLILEY CRYSTAL VX4 HAMMARLUND SP-600 VIN
Ends in 12 Days 1 Hours 5 Minutes 46 Seconds
Current price: $70.31 (0 bids)
COMPONENT  HAMMARLUND SP-600 VINTAGE RADIO #E4-06
COMPONENT HAMMARLUND SP-600 VINTAGE RADIO #E4-06
Ends in 12 Days 1 Hours 8 Minutes 25 Seconds
Current price: $52.51 (0 bids)
For parts TRU-OHMS RESISTORS HAMMARLUND SP-600 JX-
For parts TRU-OHMS RESISTORS HAMMARLUND SP-600 JX-
Ends in 12 Days 1 Hours 12 Minutes 48 Seconds
Current price: $34.71 (0 bids)
 DIAL POINTS HAMMARLUND SP-600 JX-16 HAM VINTAGE R
DIAL POINTS HAMMARLUND SP-600 JX-16 HAM VINTAGE R
Ends in 12 Days 1 Hours 13 Minutes 16 Seconds
Current price: $34.71 (0 bids)
HAMMARLUND SP-600JX XTAL HOLD-DOWN SPRING CLIPS -
HAMMARLUND SP-600JX XTAL HOLD-DOWN SPRING CLIPS -
Ends in 14 Days 12 Hours 14 Minutes 44 Seconds
Current price: $30.00 (0 bids)
Hammarlund SP-600 Service Manual Reprint
Hammarlund SP-600 Service Manual Reprint
Ends in 15 Days 10 Hours 23 Minutes 13 Seconds
Current price: $9.95 (0 bids)
Hammarlund SP-600 Parts Manual Reprint
Hammarlund SP-600 Parts Manual Reprint
Ends in 15 Days 10 Hours 23 Minutes 55 Seconds
Current price: $9.95 (0 bids)
Hammarlund SP-600 Operation Manual Reprint
Hammarlund SP-600 Operation Manual Reprint
Ends in 15 Days 10 Hours 24 Minutes 30 Seconds
Current price: $9.95 (0 bids)
(10) 5’X7’ PHOTOS OF EXTREMELY RARE HA
(10) 5’X7’ PHOTOS OF EXTREMELY RARE HA
Ends in 21 Days 8 Hours 55 Minutes 48 Seconds
Current price: $5.00 (0 bids)
Hammarlund SP-600-JX, J Communication Receiver Man
Hammarlund SP-600-JX, J Communication Receiver Man
Ends in 21 Days 18 Hours 33 Minutes 52 Seconds
Current price: $12.00 (0 bids)
Hammarlund SP-600 TwinAx Ant Plug UG-102 (PL-284),
Hammarlund SP-600 TwinAx Ant Plug UG-102 (PL-284),
Ends in 21 Days 22 Hours 45 Minutes 29 Seconds
Current price: $21.99 (0 bids)
LOT 19 VACUUM TUBES LAMPS HAMMARLUND SP-600 VINTAG
LOT 19 VACUUM TUBES LAMPS HAMMARLUND SP-600 VINTAG
Ends in 22 Days 23 Minutes 11 Seconds
Current price: $319.00 (0 bids)
HAMMARLUND SP 600-J X-17, AN 16-45-434/31R2-4-18-2
HAMMARLUND SP 600-J X-17, AN 16-45-434/31R2-4-18-2
Ends in 22 Days 14 Hours 48 Minutes 25 Seconds
Current price: $19.95 (6 bids)
Hammarlund SP600 XJ-17 UTC SE Opt Transformer
Hammarlund SP600 XJ-17 UTC SE Opt Transformer
Ends in 22 Days 19 Hours 19 Minutes 59 Seconds
Current price: $79.00 (0 bids)
Hammarlund SP-600 JX17 Operation & Service Man
Hammarlund SP-600 JX17 Operation & Service Man
Ends in 28 Days 21 Minutes 7 Seconds
Current price: $9.95 (0 bids)
HAMMARLUND SP-600 PLASTIC FUSE COVER NOS
HAMMARLUND SP-600 PLASTIC FUSE COVER NOS
Ends in 28 Days 9 Hours 35 Minutes 6 Seconds
Current price: $27.00 (0 bids)
Hammarlund SP-600 JX-17 with original papers..for
Hammarlund SP-600 JX-17 with original papers..for
Ends in 29 Days 9 Hours 53 Minutes 38 Seconds
Current price: $350.00 (0 bids)
Three Manual Set  Hammarlund SP-600 Series Radios
Three Manual Set Hammarlund SP-600 Series Radios
Ends in 29 Days 19 Hours 35 Minutes 12 Seconds
Current price: $14.95 (1 bid)

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