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Hammarlund Mfg. Co., New York / Mars Hill NC

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überarbeitet am 19.10.2010

Similar to other American radio manufacturers, Hammarlund started as producer and distributor of parts for the construction of "home-brew" wireless receivers. In 1931, Hammarlund sold the first complete receiver, the "Comet". This and the following "Comet Pro" were the first commercially available superheterodyne receivers.
The "Comet Super Pro" was the ultimate shortwave receiver available in 1936, from this so called "SP", the development went over the prototype SP-10 to the regular model SP-110; the SP-600 as the latest model of this series has been produced until 1972. Over all the years, it's front panel with it's windows for the main- und bandspread tuning has only slightly been altered.
In the middle price segment, a second series beginning with the HQ-120 (or HQ-120X with integrated crystal filter) was presented in 1938. In the following years, this series with the HQ-140, HQ-160 and HQ-180 receivers was very successful among ham radio operators and production run out in 1973. The frontplate with main- and bandpsread tuning dial window and the optional electric clock is also quite typical.
The attempt to enter the transistorized amateur radio receiver market with the HQ-215 was not really successful, Hammarlund ceased receiver production in the early seventies and the company ended after several take overs, amongst others by the Cardwell group.

HQ - 100: 1956,
single conversion, AM, SSB (BFO, optional), 540 kHz - 30 MHz, Noise limiter, Q multiplier,
HQ - 100C: version with integrated clock
HQ - 100A: version with integrated BFO
HQ - 129X: 1946, single conversion, AM, SSB(BFO), 540 kHz - 31 MHz, Noise limiter, RF Gain
HQ - 140X: 1953, single conversion, AM, SSB (BFO), 540 kHz - 31 MHz, Noise limiter, RF Gain
HQ - 145: 1959, double conversion, AM, USB, LSB, CW, 540 kHz - 30 MHz, Noise limiter, RF Gain
HQ - 145C: with integrated clock
HQ - 145X: with fixed frequency crystal
HQ - 145E: with transformer 115 / 230 V
HQ - 145 AX: with 11 fixed frequeny crystal positions
HQ - 150: 1956, single conversion, AM, SSB (BFO), 540 kHz - 31 MHz, Noise limiter, RF Gain, crystal calibrator
HQ - 160: 1958, double conversion, AM, SSB (BFO), 540 kHz - 31 MHz, Noise limiter, RF Gain, crystal calibrator
HQ - 170: 1958, triple conversion , AM, SSB (BFO), Afu- Bänder, Noise limiter, RF Gain, crystal calibrator
HQ - 170C: built in electrical clock
HQ - 170A: optional 2m-band- converter
HQ - 180: 1959, triple conversion, AM, USB, LSB, CW, 540 kHz - 30 MHz, Noise limiter, RF Gain, crystal calibrator
HQ - 180C: built in electrical clock
HQ - 180RC: rack version, built in electrical clock
HQ - 180XE: with 11 fixed frequeny crystal positions and 115/230 V- transformer
PRO - 310: 1955, double conversion, AM, SSB (BFO), 550 kHz - 35,52 MHz, Noise limiter, crystal calibrator
SP - 400 - X: 1946, single conversion, AM, SSB (BFO), 540 kHz - 30 MHz, Noise limiter
SPR - 400 - X: rack version
SP - 400 - SX: expanded frequency range 1,25 - 40 MHz
SP - 600 - JX / Super Pro 600: 1951, double conversion, AM, SSB (BFO), 540 kHz - 54 MHz, with 6 fixed frequeny crystal positions
IF bandwidths 13 / 8 / 3 / 1,3 / 0,5 / 0,2 kHz, Noise limiter