Here is a link to 11 meter band stl's...

[rtc]

http://dxinfocentre.com/STL.htm

 

[jd]

All right, I guess I'll go first and ask the obvious question. What's the advantage, if any, of running an STL on a low frequency like that?

 

[BobOnTheJob]

After jd's question is answered, next question : Are any of these in actual use?

 

[frankberry]

In the case of WFLA, Tampa, which operates a transmitter on 25.87MHz with about 100 watts of power, it is not an STL. This transmitter carries their on-air programs for reception by the general public.
They have had reception reports from all over the world from this transmitter.
I doubt that any of the US stations are using these frequencies as STLs.

 

[stormy01]

The stations that are using 11 meter band Short Wave frequencies are supposedly using these for remotes , I thought. I don't believe that the FCC permits nor condones domestic Short Wave "broadcasting" on any frequency. I won't spoil the fun and tell the FCC, I would love to pick these stations up!!!

 

[frankberry]

The stations that are using 11 meter band Short Wave frequencies are supposedly using these for remotes , I thought. I don't believe that the FCC permits nor condones domestic Short Wave "broadcasting" on any frequency. I won't spoil the fun and tell the FCC, I would love to pick these stations up!!!

I believe that you are correct. NOBODY uses these frequencies for remotes. Some stations pretend to use them for IFB return audio to the remote sites.
If that's the case, why are these transmitters on the air 24/7?

 

[Ai4i]

Some stations pretend to use them for IFB return audio to the remote sites.

The kewl thing is that they can often be pre-delay.
We used to listen to an SCA which was pre-delay.

 

[stacker]

I would suspect no one uses these frequencies for RPU anymore, much less STL service. The licenses for most probably still exist because some bean counter in the company is continuing to pay the regulatory fee for the frequency.

 

[w9wi]

http://dxinfocentre.com/STL.htm

The stations in that list in the U.S. are not studio-transmitter links. That band is not legal for STL service in the U.S..

Most of these are for cuing talent on remote broadcasts. If you hear one, you'll probably hear it simulcasting the station's normal AM or FM frequency. If you're really lucky, you may hear someone at the studio interrupt the simulcast to pass information and/or cues to someone at a remote site.

Bill also mentions unlisted low-power stations. Many TV stations have transmitters of one watt or less on these bands installed in their live trucks. They're used for the same purpose: cuing reporters on live remote.

 

[Ai4i]

Back in the late 1960's, we slope detected one between two CB channels for WGBS (now, WAQI) Miami, but, as we lived near their studio building, we suspect it was an image from below that frequency, probably 26.09, 26.13, 26.19, or 26.23. (IF X 2 = image frequency)

 

[kenglish]

KSL Radio uses the 26 MHz transmitter as an Interruptable Fold-Back (IFB) for live news-gathering in the downtown "concrete jungle" area, where 170 and 450 MHz are not always reliable.
It's located on a tall office building downtown, and turned on and off from the studio. Until recently, it's transmitting antenna was a few inches higher than a nearby construction crane's "hook". ;D

 

[Ai4i]

How many consumer level radios out there will do FM below 30Mhz?
Slope detecting doesn't count!