[QCWA] Some Television trivia...
Jeffrey D Angus
jdangus at att.net
Tue Oct 8 22:56:40 EDT 2013
"The FCC in May 1948 formally changed the rules on TV band
allocations based on propagation knowledge gained during the era
of shared-user allocations. The 44-50 MHz band used by Channel 1
was replaced by lower-power narrow band users." I.e., land mobile.
<http://en.wikipedia.org/wiki/FM_broadcast_band>
"AfterWork War II,the FCC moved FM to the frequencies between
88 and 108 MHz on June 27, 1945." Known as FM-2 at the time.
<http://www.princeton.edu/~achaney/tmve/wiki100k/docs/FM_broadcasting_in_the_USA.html
<http://www.princeton.edu/%7Eachaney/tmve/wiki100k/docs/FM_broadcasting_in_the_USA.html>>
Additionally, "Channel 1" was moved back and forth above and
below 50 MHz by the FCC during it's short "reign" on the TV dial.
There's a VERY narrow window of manufacturing there.
Back round 1995 I acquired the Andrea AM/FM/TV set. I finally
got around to working on it in 2001. I'd replaced all the caps.
If I remember right, about 65 paper caps and 30 or so electrolytics.
<http://www.earlytelevision.org/andrea_t-vk127.html>
This is the table model with a steel cabinet. I have to wooden cabinet
floor console version. (Not the one in the ads with the doors)
Nice shot of the "innards" of someone else's TV set.
<http://i268.photobucket.com/albums/jj7/300cSRT8_photos/Andrea%20T-VK12%20and%20Table%20Resto/AndreaT-VK12Resto003-2.jpg>
I added a "PC power cord receptacle" to the back of the chassis.
(I'm VERY anal about proper grounding of AC power.)
And replaced the defective AC on/off switch on the volume control
with a NOS switch.
As I remember, I got the FM portion working. Very weird to hear
Led Zeppelin coming out of the speaker. I don't remember if I had
the AM section working or not.
Side note: 540-1610 KHz, at the time the 1600-1700 KHz portion
was still called "Police short wave band" and not always available.
I did get knocked on my ass by the CRT HV supply, so I know that
is working, but the CRT didn't have a dot or raster.
I have a used "good" CRT in a box around here somewhere.
The last thing I managed to do, was beat out Steve McCoy at
the <http://www.earlytelevision.org/> for the Andrea Dealer
sign.
One of these days I'll finish it up and settle down for some
reruns of Car 54 where are you on the dvd player.
Jeff-1.0
wa6fwi
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