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Nighttime Protection of the Original 'Regionals' ?

Schroedingers Cat said:
There are quite a few more 1000 watt and 500 watt nondirectional stations from the early days of radio still around. We had a thread about this a few years ago. As for 5000 watt ND-N, what about KFRC...KEAR San Francisco, CA? I think KJR was that way before they went to 50000 watts. I'll look in my 1969 WRTH later.
Click to expand...

Also look at the former and current territories. Here are a few:

WKAQ-580 San Juan 5 kw non-d prior to increasing to a directional 10 kw.
KENI-550 Anchorage before messing with the day power.
KGMB / KSSK 590 Honolulu.
KNDI 1270 Honolulu
KPOI 1380 Honolulu
 
DavidEduardo said:


Also look at the former and current territories. Here are a few:

WKAQ-580 San Juan 5 kw non-d prior to increasing to a directional 10 kw.
KENI-550 Anchorage before messing with the day power.
KGMB / KSSK 590 Honolulu.
KNDI 1270 Honolulu
KPOI 1380 Honolulu
Click to expand...

David, can you find and post that link again that showed all the ND-N power levels originally authorized under NARBA? I couldn't find it no matter how I advanced searched.
 
Schroedingers Cat said:
David, can you find and post that link again that showed all the ND-N power levels originally authorized under NARBA? I couldn't find it no matter how I advanced searched.
Click to expand...

I will look. I am away from the website computer, but will check a bit later.
 
Thanks, David.

I think that WMT and WREC must have entered into a mutual agreement. When I have some time, I'll look through the Hx Cards.
 
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DavidEduardo said:


I loved that WQAM tower. I even envied it!
Click to expand...

I remember someone here saying a while back that WQAM could be heard in Bermuda in the daytime and it was in the summer too.

I'm wondering just how far out in the ocean they could be heard until the signal is barely audible.
 
Back to WMT v WREC, I'm with you SC, the two probably had a mutual agreement. I'm guessing back in the 40s, a somewhat quiet but steady and interference free signal was preferred over a louder signal with a little co-channel chatter in the background.
 
Schroedingers Cat said:
Thanks, David.

I think that WMT and WREC must have entered into a mutual agreement. When I have some time, I'll look through the Hx Cards.
Click to expand...

In the meantime, you may enjoy a new addition to the site which is a 1946 study of FM circular polarization done by Carl Smith for WHK in Cleveland and it includes a picture of Carl in front of the FM transmitter used at the time. It is in The Crypt section. Full of the original maps and charts, too.

http://www.americanradiohistory.com/The-Crypt.htm

Mr Smith says, in part,

"(1) That the Federal Communications Commission adopt
circular polarization as the standard for FM and
TV broadcasting stations. If the use of only vertical
or horizontal polarization appears desirable
in special circumstances, its use may be authorized
upon a showing of need."
 
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Thanks for this valuable information.
While nearly all FM stations are using circular polarization, it's amazing that circular polarization is not recommended for digital TV.
 
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