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HQ-120X 'Pre War' Receiver Test Results

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Author Topic: HQ-120X 'Pre War' Receiver Test Results  (Read 8342 times)
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Posts: 401

« on: November 26, 2008, 03:18:38 PM »

Receiver: Hammarlund HQ-120X

Band    MDSBlocking DR   Two-tone DR
  (20 kHz)  (20 kHz)
80 meters   -135 dBm        107 dB    81 dB
40 meters   -136 dBm        105 dB    76 dB
20 meters   -135 dBm        104 dB    75 dB

AM audio S/N: 54 dB

Additional measurements of AM audio frequency response and distortion can be found at


Scroll down to link Hammarlund HQ-120X

Many thanks to Tom, WA3KLR for making this receiver available for testing.

'Tnx Fer the Dope OM'.
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Posts: 3519

« Reply #1 on: November 27, 2008, 08:34:54 AM »

Those 3 IF stages sure help but that is the only radio Ive seen that uses a power pentode in an IF stage. Guess it doesnt overload Smiley Im surprised the 20M MDS is that good, thats better than many riceboxes. It says something about Hammarlunds skill in minimizing circuit losses considering the tubes used.

My HQ-120X gets cycled into service along with the others that can actually be used on the bands.

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