"Boston's Real Jazz" WZBR 1410 on air
Tue Dec 24 10:37:32 EST 2013
When operated at 1200 kHz or above and a ground system that consists of 120
1/4-wavelength ground radials, 75' Valcom whips are supposed to meet FCC
efficiency requirements (inverse-distance field of 281.4 mV/m/kW) for
standard AM radiators. I have a feeling, however, that that prediction may
be a bit optimisitic. WZBR's horrible signal up here in Arlington Heights
has been blamed on anomalous ground conditions, but I don't believe that,
along the radials that point this way (roughly true north, IIRC), the signal
comes close to the specified ID field.
Dan Strassberg (firstname.lastname@example.org)
----- Original Message -----
From: "Dale H. Cook" <email@example.com>
Sent: Tuesday, December 24, 2013 7:57 AM
Subject: Re: "Boston's Real Jazz" WZBR 1410 on air
> At 04:50 AM 12/24/2013, Sean Smyth wrote:
>>How efficient/effective are longwire antennas vs. standard towers at the
>>same frequency/power level?
> Not very, which is why the Commission allows them for STAs only.
> Dale H. Cook, Contract Engineer, Roanoke/Lynchburg, VA
More information about the Boston-Radio-Interest