[Boatanchors] Discone

[Drew P.]

John wrote:

"I have used AN/APR-1s and AN/APR-4 receivers off and on for many years
(decades). Hopefully I will soon have an APR-5 receiver up and running soon
along with a RDO (shipboard version of APR-4) or two. The receivers are very
broadband (1-3 MHz depending on the selectivity switch on the APR-4) and not
very sensitive on the higher bands. The higher band sensitivity is measured
in millivolts versus microvolts. The lower frequency tuning heads were okay
for commercial FM broadcasts and VHF/UHF television reception. I could hear
local aircraft on the military 200-400 band. When used in conjunction with a
30 MHz panadaptor, the receiver was a crude narrow band spectrum analyzer
and useful for tuning up local oscillators and low power transmitters.
Although even then there are drawbacks because the higher frequency tuning
heads use the harmonic from the local oscillator and the fundamental and
harmonic image rejection is quite poor. Yet, I still like them!"


I had one, gave it away to an air museum a number of years back.  Don't know if they ever did anything with it.

Drew