Quote:
Originally Posted by Electronic M
I gotcha. . . . . from owning a Zenith porthole . . . .
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Electronic M,
Thanks! I stand corrected!
I am not familiar with the early Zeniths, as the town where I lived and worked, until I quit Radio/TV service in 1960, had no Zenith dealership until the mid-1950's. So I pulled up pictures of these chassis and hit this on the second try.
http://www.earlytelevision.org/pdf/Z...237-Riders.pdf
(Zenith chassis 22H20/23H22/24H20-21 in Riders Vol 8, Zenith page 6-8 left side)
If one looks at Figure 9 between pages 6-7 and 6-8 you will see a late 1940's Zenith chassis with a wired remote control sitting on top of a huge barrel tuner.
This is what I mistook for a dynamotor. An apparent shadow made it look like a separate chassis.
That is the beauty of this site. If someone royally puts his foot in his mouth, as I just did, someone will quickly correct him.
Since the Zenith's transformer is still in place, we must assume that he uses some source of AC, which in this home-made conversion probably would be a war-surplus dynamotor.
The smallest version of this set pulls 225 watts at 117 V AC.
I = P/E or 225 watts / 6 volts = 37.5 amps assuming that the dynamotor conversion was 100% efficient.
From memory, dynamotors were only between 60 & 70% efficient. On a quick search, I could not confirm this figure as these things are so obsolete.
Assuming 70% efficiency, the battery drain would be 54 amps!
In any case, this set would be a battery killer in a 6 volt car, and this illustrates some of the design choices in the Delco proof-of-concept set!
James.