Improving KPFK Signal for the San Diego area

Kpfk Radio Interference

Raymond talked with rep. from KPFK who was complaining about interference by an "illegal" radio station at 90.7Mhz.

Here's the station and probably business offices of the station in Chula Vista. It's about 5 miles from the intl border; however, their tower/XTMR is in BC, Mexico! BTW I've been listening to KPFK for about an hour, since we talked and haven't noticed any interference. Did the folks from KPFK say how much or what time of day or how long they've been experiencing interference from 90.7 in CV. I'm asking because if it hasn't been too long it's possible that the problem was noticed through a 'proof of performance' test and corrected by their engineers. How long they've been getting interference would answer this question.

Xlnc1-Classical Music-90.7 FM
1690 Frontage Rd
Chula Vista, CA, 91911
(619) 570-1907

I just found the station on line: classical music. yes this is owned partly by the Mexican government, it is a non-commercial, listener supported station. It's not bad either, give it a listen. Next, I'll go back to the FCC and see if it's licensed in the US; I'm guessing not, but I don't know. If it is than KPFK has a grievance and can report the interference; if not ....



I wrote a complaint letter to the FCC on the interference of KPFK Translator 93.7 MHz FM since I am getting a lot of interference from KDB 93.7 MHz FM Santa Barbara. Amazingly , the FCC called me and explained the situation.

1) KDB has a standard license to transmit 1200 W and does so.

2) KPFK has a translator license and is allowed to transmit 10W from a transmitter somewhere south west of Ramona.

3) The reason for the interference is obvious. Both stations are on the same frequency and while farther away the KDB station has 100 times the power.

4) BUT, the FCC said that translators are not limited to 10 W so perhaps KPFK could apply for a 100W transmitter license. Also the antenna pattern is apparently shaped to favor north San Diego. This could be changed.

A 100 W FM transmitter is not expensive and a 3m high antenna with some shaping would provide good gain. This would quadruple the San Diego area coverage.

We might then be able to communicate with East County.

Topic revision: r1 - 20 Oct 2012, RaymondLutz
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