[Premium-Rx] HRO-600 and Polamar Antenna

[Peter C. Patton]

Another HRO-600 Polamar antenna story.
I took an interest in VLF/ ULF listening some years ago and was lucky to 
find Stoddard NM-10 and NM-20 radios (RF voltmeters?) with all of their 
magnetic mode loop antennas in the yellowsheets. It was fun to listen to 
LF from the USSR and tune any airport in the US and Canada.  When I 
bought the HRO-600 and tried to tune in these stations all I heard was 
noise, except for WWVB on 60kHz and the local  MSP airport on 285kHz. So 
I bought a Polamar antenna base and set of plugins for 10kHz to 15MHz. 
They really worked on the lower bands but all the BCB and SW plugins 
added over a long wire was directivity. With the Polamar antennas I 
could hear the Omega stations on 10, 11, 12.5 kHz and Jim Creek on 19.5. 
I was telling the guys at the local ham radio store in Minneapolis but 
none of them had ever heard these signals and didn't believe me, so I 
took the HRO-600 and the Polamars in the next day to demonstrate. We 
listened to Omega stations and WWVB and then I tuned in Jim Creek in La 
Osa  and they listened to coded slow CW for a few minutes. One of the 
clerks said: " I don't know abut this HRO-600, but that magnetic mode 
antenna is really something!"
Pete Patton W0EWQ