215
The Hammarlund 215 transistorized receiver.
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Comet
The Hammarlund "Comet" line of receivers was perhaps the first super heterodyne communications receiver. The receiver is variation 5 which is 9 tubes vs the 8 of the earlier models. It has the early 30's crystal filter and avc and six sets of plug in coils covering 8-550 meters. The coils and their ranges in meters are AA 15-31; BB 28-61; CC 56-120; DD 115-250; EE 250-550; and XX 8-16. There are two coils for each frequency. One coil is marked OSC and the other W. L. (wave length) and each coil has its own variable capacitor. These capacitors are on either side of the main center dial which is the "band spread" function. All of the tuning scales are 0-100. To get a station the two coil caps are set at the same dial reading and the center dial works as a band spread dial. The cans are under some of the tube sockets and contain coils, caps, and resistors. Related documentation is instruction manual #2 Installing Operating and Servicing the Crystal Model; Manual #3 Installing Operating and Operating the A.V.C. model; and the 5th edition of the Hammarlund Comet "Pro" instruction manual (old style 9-1/2 x 12 size). Production year 1933.
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Four-20
Hammarlund Four.20 transmitter. This is a CW transmitter, crystal controlled 80-10 meters, self contained. Uses an 807 in the final. This is the transmitter shown in the old radio Handbook paired with the HQ-129X.
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HX-50
Hammarlund HX-50 transmitter, 160 - 10 meter. This transmitter matches the HQ-series receivers. Manufactured around 1965-'68.
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HX-50A
Hammarlund HX-50 transmitter, 160 - 10 meter. This transmitter matches the HQ-series receivers. Manufactured around 1965-'68.
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SP-600
Hammarlund SP-600 JX Super Pro receiver.
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