The HQ-145 Page

by Josh Rovero, KK1D

Updated: April 11, 2009

The Hammarlund HQ-145 is a single (below 10 MHz) or dual conversion (10 to 30 MHz) general coverage receiver. It is equipped with both a Lamb crystal filter and an IF T-notch. The X-suffix models sport a single crystal socket for fixed frequency operation. The later A-suffix model replaces the tube rectifiers with solid state diodes, while the AX model had 11 switched crystal sockets in addition to the variable HFO. IF frequencies are 455 KHz and 3035 KHz.

References:

1. "HQ-145X Communications Receiver, Technical Description and Operating Instructions", Hammarlund Manufacturing Company (A Giannini Scientific Company), April 1962.
2. "Communications Receivers, The Vacuum Tube Era 1932-1981", 3rd Edition, by Raymond S. Moore
3. "Shortwave Receivers Past & Present", 2nd Edition, by Fred Osterman
4. Contributors

Chassis, top      Chassis, bottom      Schematic (3300x2400 pixel GIF, 212K)

HQ-145 photo and data from www.dxing.com