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Having worked in the business over 54 years with LW MW and SW
transmission systems up to 2 megawatts and having built numerous MW
arrays to 12 towers I would respectfully suggest a quick check of
fundamental broadcast history. Google is your friend.
BTW most early stations broadcast from rooftops, not mountain tops,
and some diamond towers (Blau Knox) are still in service at legendary
stations.
On 5/6/12 9:40 PM, ZR wrote:
> Carl has nothing backwards, best do your research the next time.
>
> ----- Original Message -----
> From: "W2XJ"<w2xj@nyc.rr.com>
> To:<topband@contesting.com>
> Sent: Sunday, May 06, 2012 7:40 PM
> Subject: Re: Topband: Monopole Radiation Patterns, takeoff angles etc
>
>
>> 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
>>>
>> _______________________________________________
>> UR RST IS ... ... ..9 QSB QSB - hw? BK
>>
>>
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> _______________________________________________
> UR RST IS ... ... ..9 QSB QSB - hw? BK
>
_______________________________________________
UR RST IS ... ... ..9 QSB QSB - hw? BK
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