Re: [IRCA] QSL request

["Paul B. Walker, Jr." <walkerbroadcasting@xxxxxxxxx>]

Steve,

I will try an answer your question from a broadcasters point of view. I have
a general understanding of RF and FCC stuff.

When you see a station's licensed power listed, it is almost always for a
1/4 wave tower. When I was at WQMA 1520, our tower was 150 feet which is 1/4
wave for 1520 Khz. If the tower is taller then 1/4 wave, it is therefore
more efficent then it needs to be.

If a tower is more efficent (taller then required) then you don't need quite
as much power to make the same coverage area that a slightly shorter tower
would produce.

Most stations elect for 1/4 wave towers, much much cheaper to build.

Paul Walker
www.onairdj.com

P.S. I think Powell would even agree I explained this one well.



On Thu, Oct 30, 2008 at 12:23 PM, Steve Ratzlaff <steveratz@xxxxxxxxxxxx>wrote:

> As an AM TX and general domestic AM dummy, what does all this mean, about
> not being able to put a 1kW signal into some type of tower? What does the
> power and or tower have to do with not being able to feed full power into
> the antenna?
> Steve
> ----- Original Message ----- From: "Paul B. Walker, Jr." <
> walkerbroadcasting@xxxxxxxxx>
> To: "Mailing list for the International Radio Club of America" <
> irca@xxxxxxxxxxxxxxxx>
> Sent: Thursday, October 30, 2008 9:44 AM
> Subject: Re: [IRCA] QSL request
>
>
>  There was an AM not far from me at WABV, that was on a Class C Channel and
>> supposedly had a 5/8 wave tower.. and put the full 1KW into the tower.
>>
>> Glad we could try and help!
>>
>> Paul Walker
>> www.onairdj.com
>>
>>
>> On Thu, Oct 30, 2008 at 6:36 AM, Craig Healy <bubba@xxxxxxxxxxxxxxxxxxxx
>> >wrote:
>>
>>  The station that received the QSL is WNBH-1340 in New Bedford, MA.  The
>>> report came from Finland.  There have been a few reports from Scandinavia
>>> in
>>> the past few years.
>>>
>>> WNBH is a bit of an anomoly in that it has a tall tower, yet puts the
>>> full
>>> kilowatt into in.  No power cutback to make it an equivalent
>>> kilowatt/quarter wave tower.  On vacation on Monhegan Island off the
>>> coast
>>> of Maine I could hear WNBH if I nulled the other pests.  It does get out
>>> well.
>>>
>>> Thanks to all for the ear work!
>>>
>>> Craig Healy
>>> Providence, RI
>>>
>>>  _______________________________________________
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-- 
Sincerely,
Paul B. Walker, Jr.
www.onairdj.com
walkerbroadcasting@xxxxxxxxx
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