Who needs a repeater when you have 500,000 watts?

[WRKS279]

I stumbled onto this video on YouTube tonight about the WLW radio station that for a few years in the early 1940's ran with 500,000 watts of power.

 

https://youtu.be/CbHjcwIoTiY

 

It was so powerful that it covered about 3/4 of the United States, and extended considerably into Canada. In fact, Canada filed a complaint because it just overpowered one of its own beloved stations. WLW had to setup two suppressor towers to decrease their reach in that particular direction. Its quite a fascinating video. Enjoy.

[axorlov]

Try this on UHF, and Canada will be just fine, but the colony on Mars will object.

[smalpierre]

Try this on UHF, and Canada will be just fine, but the colony on Mars will object.

But what if I want to listen to the radio from the other side of the galaxy?

[BoxCar]

But what if I want to listen to the radio from the other side of the galaxy?

Then you'll need a quad pole terinium filled filter for your receiver. They're available at Mxltypyx's store on Venus for 400 gold filled latinum bars.

[axorlov]

But what if I want to listen to the radio from the other side of the galaxy?

And also, what would you listen to 100000 years ago?

[gman1971]

Well, the 1400 foot tower that is placed ~1.5 miles from my house has at least one 250kW UHF TV station on it...  500kW is just 3dB more than 250kW... so...

[AdmiralCochrane]

I am 4 miles from a 1,000kw UHF TV station on a 1,000 ft tower - I guess I am safe

[gman1971]

Well, not really, and 1000 kW is only 3dB more than 500 kW, so...

 

The tower, with 1 MegaWatt @ 490 Mhz (roughly around where UHF TV station transmit) is a whopping +90dBm; so, if you calculate the attenuation/loss in free space , since the tower is 1000 feet high in the air, and there are no terrain LOS obstructions within 4 miles, most likely....

 

So, you get roughly a -96dBm @ 490 Mhz attenuation/loss of those firebreathing +90dBm over a 4 mile distance, so, these CCR receivers are seeing a massive -6 dBm signal on the front end, only a few MHz off the channel frequency.

 

In comparison, your superduper 50W GMRS mobile is putting roughly +46dBm, so, at the same 4 miles, given roughly the same -96 dBm attenuation @462 Mhz, the CCR receiver is seeing your GMRS mobile as a faint -50 dBm, on frequency, but a few MHz away there is this firebreathing signal that will completely obfuscate the desired signal you're trying to listen. And if that 1 MW transmitter is on the "right" frequency, to mix with the 1st IF stage frequency (for the Superhets) to create IMD, then you'll have all sorts of reception issues, or no reception at all.

 

Basically, you're trying to hear a nylon string classical guitar, without amplification, over a pipe organ playing at full power.

 

G.

 

I am 4 miles from a 1,000kw UHF TV station on a 1,000 ft tower - I guess I am safe

[mbrun]

Cool line! Permission to reuse?

 

... Basically, you're trying to hear a nylon string classical guitar, without amplification, over a pipe organ playing at full power.

 

G.

 

Michael

WRHS965

KE8PLM

[drk1970nj]

Mega power

 

 

Sent from my iPhone using Tapatalk

[axorlov]

Giga power, quite literally.

[gman1971]

Sure, why not! LOL... 

 

glad you liked it!

 

G.

 

EDIT, I also made a mistake... as always... its 1 MEGA watt, not 1 GIGA Watt... oh well..

 

G.

 

Cool line! Permission to reuse?



Michael
WRHS965
KE8PLM

[gman1971]

Yes... yes, I know, wish it was 1 GigaWatt, but its only a mere MegaWatt... oh well...

 

G;

 

Giga power, quite literally.