Note
Ham Radio, Jun 1977, p. 120.
QST, Jul 1977, p. 154.
QST, Aug 1977, p. 104. (good photo)
QST, Feb 1980, p. 131.
QST, May 1981, p. 167.
Converts signals in the 10–500 kHz VLF band to the amateur 80-meter band so they can be heard on an ordinary shortwave receiver.
The converter provides reception of the 1750 meter band at 160–190 kHz where transmitters of one-watt power can be operated without FCC license. It also covers the navigation radio-beacon band, standard frequency broadcasts, ship-to-shore communications, long-range navy transmitters, and the European low-frequency broadcast band.
The Palomar converter is simple to use and has no tuning adjustments. Tuning of vlf signals is done by the associated receiver which picks up 10 kHz signals at 3510 kHz, 100 kHz signals at 3600 kHz, and 500 kHz signals at 4000 kHz. The converter features crystal control for accurate frequency conversion, a low noise RF amplifier for high sensitivity, and a multi-pole filter to reject broadcast and shortwave interference.
