I think Carl may have his time line backwards. In the 20s and early 30s
many stations used various forms of wire antennae including dipoles and
various cage designs. During the 30s Dr Brown and colleagues studied and
tested various vertical radiators and ground systems. The result of that
work remains the underpinning of most MW radiators and a substantial
amount of it ultimately became part of FCC rules and standards in many
other parts of the world. Some stations continued with their wire
antenna into the 40s and some paid a penalty of having stations moved
into the natural nulls of a dipole.
On 5/6/12 6:18 PM, Kevin wrote:
> WHO-AM (1040 KHz) still uses the modified Franklin.
> Their 50KW covers the entire state of Iowa + during the day and goes
> international at night.
>
>
> On 05/06/2012 11:31 AM, ZR wrote:
>> The BCB stations migrated from 1/2 and 5/8 wave antennas, diamond shaped
>> towers, and mountain tops by the early to mid 30's as they started to
>> understand how things worked...or didnt.
>>
>> Carl
>> KM1H
>>
> -- R. Kevin Stover AC0H
> _______________________________________________
> UR RST IS ... ... ..9 QSB QSB - hw? BK
>
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UR RST IS ... ... ..9 QSB QSB - hw? BK
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