Quote:
Originally Posted by Penthode
I mentioned in another thread about the humongous power transformers some early Canadian TV's had. Toronto was 25 Hz up until about 1952. Hence the power transformers they employed were pretty big.
I spotted on the Toronto Craigslist a Toronto made Motorola set. The rear view of the set is interesting: there appears to be an outboard power transformer located at the bottom rear. You can make out some heavy cabling going from the transformer to the chassis.
I recall some older Canadian sets assembled from a US chassis which had transformers too big for the chassis. But I do not recall seeing the transformer mounted elsewhere.
http://toronto.en.craigslist.ca/tor/atq/2691715215.html |
It might be a bit surprizing that central Arizona still had pockets of 25 cycle up into the 1970s, when the last of the Salt River hydro dams went to all-60 cycle. I remember in the town of Roosevelt (on the Roosevelt Dam for which the town was named), you could actually see the 25 cycle flicker of some incandescent lights. Up through the '40s and '50s, a lot of 25 cycle consumer stuff got scrapped along the way, and that's how i got ahold of the TV power transformers mentioned earlier, used as back-to-back modulation transformers. And i just used them 'cause they were handy. Nobody had said it "wouldn't work", so being a dumb kid, i went ahead and did it, and it worked. Often wondered if 60 cycle trannys would have worked as well in that application (in terms of avoiding core saturation with DC running thru the HV windings).
The owner of a TV shop in our town (Globe) was so impressed with the rig that he offered me a job which became the gateway to a lifelong avocation.
Some kinda interesting notes on the Salt River hydro system..
https://www.srpnet.com/gallery/trd/1971.aspx
http://www.usbr.gov/projects/Project...+River+Project