RCA Transmitter

AM Radio discussion. Directional arrays are FUN!
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abwdvm
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RCA Transmitter

Post by abwdvm »

http://www.ksstradio.com/wp-content/upl ... 743191.jpg

I guess this is our backup transmitter.

Do the tubes look right (The glow)?
technician at an 1000w AM station in Texas
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Deep Thought
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Re: RCA Transmitter

Post by Deep Thought »

If the meter readings (PA volts and current, screen and grid current) are right, they're OK. Don't go by the "glow".
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Dale H. Cook
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Re: RCA Transmitter

Post by Dale H. Cook »

The glow shown in the photo is from the filaments. 833 filaments are 10 V at 10 A, or 100 W per filament. Think of them as not-very-efficient (at visual wavelengths) 100 W light bulbs.
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Re: RCA Transmitter

Post by TPT »

Yes, but they sure are pretty.

True story. FCC inspector visiting a daytime AM station--normally 25 kw day, but they were operating on their old 1 kw BC-1T Harris transmitter.
Inspector stared at the transmitter for a while, then turned and asked the owner what those glowing things were. (The rest of the story: station hit with a big fine for not having complete public file--particularly no "issues" files. Paper much more important than RF.)
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RGORJANCE
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The glow shown in the photo is from the filaments. 833 filaments

Post by RGORJANCE »

Uhhhhhh, them there fire bottles be 4-400's, not 833's, which have two knobby thingies on top. (and bottom)

The RCA BTA-1MX did have 833's while the BTA-1R series used 4-400's.

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Dale H. Cook
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Re: RCA Transmitter

Post by Dale H. Cook »

That's what I get for doing this stuff while drinking my first cup of coffee. I glanced at the photo and moved on. The only RCA AMs I worked on all used 833s, and that was decades ago.
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RGORJANCE
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Re: RCA Transmitter

Post by RGORJANCE »

I learned long ago that it is very dangerous to do anything more complicated than getting dressed before having two cups of coffee. It's tough enough to remember to pull up the zipper! :roll:

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Dale H. Cook
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Re: RCA Transmitter

Post by Dale H. Cook »

In recent years I have found that I am sometimes incapable of making a cup of coffee before I've had a cup of coffee. I use a single-cup coffee maker, and have learned that, after a late night, before I go to bed I should grind a cup's worth of beans, put it in a filter, fill a mug with water, and put all into place in the coffee maker. That way I only have to be capable of pushing a switch in the morning.
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KPJL FM
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Re: RCA Transmitter

Post by KPJL FM »

I have a BT 8x2 switcher that gets a command from my SS32 to close a relay that's hooked to my defibulator about 1 minute after the alarm clock goes off. Either I get up and cancel the event in the SS32, or I get a nasty ....... :twisted:

Not really, but the are days when I could use something like that. Mostly days that end in 'Y'.
Trim to fit, paint to match, tune for minimum smoke.
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