Film-Tech Forum ARCHIVE: What AM tower is this (Paul G. Thompson or anyone?)

my profile | my password | search | faq & rules | forum home

»	Film-Tech Forum ARCHIVE » Community » Film-Yak » What AM tower is this (Paul G. Thompson or anyone?) (Page 8)

This topic comprises 8 pages: 1 2 3 4 5 6 7 8

Author

Topic: What AM tower is this (Paul G. Thompson or anyone?)

John Pytlak
Film God

Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000

posted 10-21-2003 01:21 PM

Other "monster" transmitters: [Eek!]

quote:
The purpose of the Voice of America, of which the Bethany Relay Station was a part, was to transmit news and information across America and around the world.
The Bethany site directed signals to Central and South America and included ten transmitters and twenty-two antennas. The total power required to operate all the equipment was 3.5 Million Watts

http://freepages.history.rootsweb.com/~butlercounty/voa.html

quote:
If you can't afford to build your own AM Radio Station to broadcast your programs across Central America, here is the next best thing:
The Voice of America (VOA) Relay Station in Belize, Central America (a U.S. Government broadcasting facility) has recently signed an agreement with the Government of Belize which allows us to provide "Third-Party" program transmission RELAY services on our two, 100,000 watt AM band radio transmitters .

http://www.voa.gov/miscl/belize.html

quote:
Behind the scenes, WLW and founder Powel Crosley worked tirelessly during the 1920s and 1930s to advance the state of radio engineering, including several years as the only U.S. station ever to operate with 500 kilowatts of power and many years as one of the few U.S. stations to operate an international shortwave plant in addition to domestic AM broadcasting....On May 2, 1934, WLW's 500 kilowatt signal, which had been operating experimentally under the callsign W8XO, made its first official appearance, activated by President Roosevelt by remote circuit from the White House at 9:30 PM.

http://www.fybush.com/site-020109.html

quote:
Originally developed for Voice of America long range high frequency broadcast service, the Model HC-114 transmitter delivers 250,000 watts of R.F. carrier power at any frequency between 3.95 and 26.5 mc. Plate modulated, the transmitter is capable of 100% amplitude modulation on a continuous basis.

http://www.transmitter.be/gat-hc114.html

100,000 Watt Output tube:

http://www.tube.be/4cv100000c.html

500,000 Watt Output tube:

http://www.tube.be/4cm500000g.html

Hints on tube life:

http://www.burle.com/cgi-bin/byteserver.pl/pdf/tp202.pdf

| IP: Logged

Phil Hill
I love my cootie bug

Posts: 7595
From: Hollywood, CA USA
Registered: Mar 2000

posted 10-21-2003 04:42 PM

More, really cool pics from here of VOA at Bethany Ohio:

One of three 250kW AM transmitters:

Control/Meter Panel:

Power Supply and High-Level Modulation Transformers:

The whole room is interlocked to kill the power and short the caps if anyone enters.

I want the power and I want it ALL NOW! [beer]

>>> Phil

| IP: Logged

Paul G. Thompson
The Weenie Man

Posts: 4718
From: Mount Vernon WA USA
Registered: Nov 2000

posted 10-22-2003 11:06 PM

Geeze, Phil....those are some real beauties....Very nice pictures. [Smile]

| IP: Logged

Phil Hill
I love my cootie bug

Posts: 7595
From: Hollywood, CA USA
Registered: Mar 2000

posted 10-22-2003 11:35 PM

Yeah Paul, that, and many other sites, have some really cool pics.

Another one of my many many vices is: I love radio (don't like TV). Have spent waaay too much time over the years surfin' those radio sites... [beer]

>>> Phil

| IP: Logged

Paul G. Thompson
The Weenie Man

Posts: 4718
From: Mount Vernon WA USA
Registered: Nov 2000

posted 10-23-2003 01:16 AM

Smellivision? IKK! [puke]

I hate TV. Hardly ever watch it unless my favorite baseball team is playing or there is some really hot news such as 911, etc. that may be airing. Other than that, TV sucks.

When I was a kid, I had an old Stewart-Warner floor radio. Back in those days, they had RF amplifiers in the front end instead of just dumping the radio station signal almost directly into the injector grid of the pentigrid converter. Those type radios had selectivity that was fine if you had the radio sitting on top the transmitter.

But those old radios that had the RF amplifiers that fed the converter....those receivers were "hot" in sensitivity. I tuned that old SW radio I had to 1000KC and connected a low-power RF signal generator to the antenna. I then tuned around on the RF generator knob and the frequency would beat with a short wave station that produced a difference frequency of 1000khz...and presto! Russia, China, VOA, WWV, you name it! I could tune it in on good "skip distance" nights better than I could get them on the short wave band. [Big Grin]

When I go and visit Josh this Christmas, I am going to bring my RF generator with me, get his old Zenith running, and see what kind of crap we can tune in like I did when I was a kid. [Smile]

| IP: Logged

Phil Hill
I love my cootie bug

Posts: 7595
From: Hollywood, CA USA
Registered: Mar 2000

posted 10-23-2003 01:26 AM

Paul, are you coming to my place for xmas? Josh told me he was spending those holidays here this year at my place...

>>> Phil

| IP: Logged

All times are Central (GMT -6:00)

This topic comprises 8 pages: 1 2 3 4 5 6 7 8

Printer-friendly view of this topic

The Film-Tech Forums are designed for various members related to the cinema industry to express their opinions, viewpoints and testimonials on various products, services and events based upon speculation, personal knowledge and factual information through use, therefore all views represented here allow no liability upon the publishers of this web site and the owners of said views assume no liability for any ill will resulting from these postings. The posts made here are for educational as well as entertainment purposes and as such anyone viewing this portion of the website must accept these views as statements of the author of that opinion and agrees to release the authors from any and all liability.