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107.5 FM's power.

T

texasstooge

I'm just curious to know why 107.5 FM's power has been reduced drastically.

Throughout it's tenure as "Smooth Jazz 107.5 The Oasis", their power output was 100,000 watts, but after they changed to MOViN 107.5, they've drastically reduced it to 25,000 and before changing to Mega 107.5, they've reduced it even more to 16,500. This leaves the frequency more susceptible to interference on its radio signals (main and HD1 & 2) even when I take my HD radio on the go. Did other surrounding cities in Abilene, Wichita Falls, or Tyler launched their stations at the 107.5 FM frequency?
 
texasstooge said:
I'm just curious to know why 107.5 FM's power has been reduced drastically.

Throughout it's tenure as "Smooth Jazz 107.5 The Oasis", their power output was 100,000 watts, but after they changed to MOViN 107.5, they've drastically reduced it to 25,000 and before changing to Mega 107.5, they've reduced it even more to 16,500. This leaves the frequency more susceptible to interference on its radio signals (main and HD1 & 2) even when I take my HD radio on the go. Did other surrounding cities in Abilene, Wichita Falls, or Tyler launched their stations at the 107.5 FM frequency?
Click to expand...

What? why in heck would anybody do that?!?!
 
texasstooge said:
I'm just curious to know why 107.5 FM's power has been reduced drastically.

Throughout it's tenure as "Smooth Jazz 107.5 The Oasis", their power output was 100,000 watts, but after they changed to MOViN 107.5, they've drastically reduced it to 25,000 and before changing to Mega 107.5, they've reduced it even more to 16,500. This leaves the frequency more susceptible to interference on its radio signals (main and HD1 & 2) even when I take my HD radio on the go. Did other surrounding cities in Abilene, Wichita Falls, or Tyler launched their stations at the 107.5 FM frequency?
Click to expand...


107.5 has not been licensed for 100kw since they moved to Cedar Hill from Kimbo Rd. back in the 70s (as KNOK-FM). They were always 25k, but reduced to 16.5kw when they moved to the new Richland North tower (they are diplexed at 574m HAAT with the Beat, Jack, the Fan, and soon to be 94.1)

The coverage did not change – wattage was reduced to compensate for increased height.
Wattage increases on a logarithmic scale, so the difference in coverage from 25kw to 16kw is not that noticeable – height is much greater factor in FM coverage.
 
The 107.5 allocation is for a class C1, rather than a full class C as most of the other Cedar Hill facilities are. Max facilities for a class C1 is 981' 100 kw (which is what KESS-FM 107.9 uses) -- or equivalent (as KMVK and KTFW-FM 92.1 use). As they go up a in tower height, the power has to drop.

The rimshots from the northwest that are full Cs also use less than 100 kw for the same reason of being on a stick taller than max for 100kw -- WBAP-FM 96.7 and KBOC 98.3 are 2037' 93 kw since the max a full C is 1968' and 100 kw.
 
Ah. Good to know. Thanks!

Still think they should increase it a little more. As I was going down certain roads, it's still susceptible to interference. LOL! ::)
 
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