From: "Michael A. Terrell"
Subject: Re: steppermotor as encoder -> presto, moterized pot. (Poor man's rate
Date: Tue, 08 Oct 2002 14:49:40 -0400
Organization: Do I have to? Well, Ok. If you insist!
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Richard Steven Walz wrote:
> In article <3DA0DA72.email@example.com>,
> Michael A. Terrell wrote:
> > I know what you mean, Chuck. I used to climb inside a Gates TV
> >transmitter through a removed end panel, stand on the HV power
> >transformer and have another engineer power it up so I could adjust the
> >coupling and drive levels. Three full racks to get 500 watts of Video
> >and 250 watts Aural on Ch 8. (AFRTS, Ft. Greely, Ak.)
> >Now it would take 5 1/4" to 7" rack space for the same thing.
> >Michael A. Terrell
> Wow, my dad designed the cooling systems and control panels for the Gates
> transmitters and some contract antenna towers, like the Sutro Tower in
> SF, CA, for everything from 1953 to 1983. We're from Quincy, Illinois.
> That funky three section panel-hangar that replaced floppy chains was
> his one classic design.
> -Steve Walz firstname.lastname@example.org ftp://ftp.armory.com/pub/user/rstevew
> Electronics Site!! 1000's of Files and Dirs!! With Schematics Galore!!
> http://www.armory.com/~rstevew or http://www.armory.com/~rstevew/Public
These were built sometime in the early to mid '60s and were both too
small to need water cooling. one was 75 watts, and the other was 500,
but I ran it at around 780 watts out to get proper sync levels. They
were near Delta Junction in Alaska, and part of the AFRN/AFRTS
networks. There was also a Gates BC250 AM transmitter at the site on
980 KHz installed in the late '40s. It may be the biggest carrier
current station ever built by accident.
Michael A. Terrell