WNAC 1200

[Dan.Strassberg]

A difference between WLS and the other three Chicago ND ex-I-A clears would
make sense; WLS's transmitter site is ~30 miles south of the sites of the
other three stations. But a difference among 670, 720, and 780 is difficult
to explain. I believe that the greatest distance between any two of the
three is less than six miles. Of course, local variations in soil
conductivity can affect long-distance reception, but the conductivity in the
Chicago area is generally very good. Also, I think WGN and WBBM are only
about 1.5 miles apart.

-----
Dan Strassberg (dan.strassberg@att.net)
eFax 1-707-215-6367

----- Original Message ----- 
From: "Kevin Vahey" <kvahey@gmail.com>
To: "Dan.Strassberg" <dan.strassberg@att.net>
Cc: "Larry Weil" <kc1ih@mac.com>; <Jibguy@aol.com>;
<boston-radio-interest@rolinin.bostonradio.org>
Sent: Thursday, August 02, 2012 2:59 PM
Subject: Re: WNAC 1200


> They moved to 720 in 1987
>
> http://www.crtc.gc.ca/eng/archive/1987/DB87-397.HTM
>
> Just an observation but 720 didn't do as well in New England as the other
> Chicago clears 670, 780 or 890.  1000 was the strongest but they were
> directional to the east.
>
> 670 could fight off 660 New York fine but WGN was just clobbered by WOR at
> night.
>
>
>
> On Thu, Aug 2, 2012 at 2:48 PM, Dan.Strassberg
> <dan.strassberg@att.net>wrote:
>
>> CHTN probably moved to 720 in the early '80s--after the Rio treaty took
>> effect. The treaty broke down the ex I-A channels and opened them up to
>> new
>> Class B AMs in the US and other North American countries. Before it moved
>> to 720, CHTN had been on 1190 for, IIRC, several decades. 1190 was a
>> Class
>> I-B channel even before WOWO gave up its I-B status.
>>
>> An interestng thing happened on 720 in New England after CHTN moved to
>> FM:
>> Bob Vinikoor was granted a CP for a station that was to run 50 kW-D in a
>> town in the Connecticut River Valley in central NH. The nighttime power
>> of
>> this station was originally to be 2500W using a six-tower array. But
>> interference to a 720 station in either Greenland or Iceland forced a
>> power
>> reduction to 670W. The NH station was never built and Vinikoor ultimately
>> turned in the CP. But what made no sense to me was that the Greenland or
>> Iceland station would have received much more interference from CHTN when
>> it was operating than it ever would have gotten from the NH station, even
>> had it run the originally planned 2500W at night.
>>
>> -----
>> Dan Strassberg
>> e-fax 707-215-6367
>>   ----- Original Message -----
>>   From: Larry Weil
>>   To: Jibguy@aol.com
>>   Cc: dan.strassberg@att.net ; dlh@donnahalper.com ;
>> aerie.ma@comcast.net;
>> boston-radio-interest@rolinin.bostonradio.org
>>   Sent: Thursday, August 02, 2012 1:29 PM
>>   Subject: Re: WNAC 1200
>>
>>
>>   Until about 10 years ago there was a 720 on PEI, Canada.  I think the
>> power was 10KW IIRC.
>>
>>   Larry Weil
>>   Lake Wobegone, NH
>>
>>   Sent from my iPhone
>>   Big freekin deal!
>>
>>   On Aug 2, 2012, at 8:48 AM, Jibguy@aol.com wrote:
>>
>>   > According to my 1963 edition of "White's Radio Log" (which I've had
>> since I
>>   > was 13 years old), there was only one station in the USA on 720 and
>> 1200;
>>   > WGN and WOAI.   Not even any daytimers on those freqs.
>>   >
>>   > ---BB
>>
>