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Old 09-21-2014, 06:49 PM
thx1138 thx1138 is offline
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Join Date: Jan 2012
Posts: 371
I'm looking at this again and saw one correction I need to make: The Ed Skilling schematic showed the three pole magnet but the poles had no polarity markings.

Question for someone who knows 50's television (maybe radar display) circuits: What's special about a vertical oscillator type transformer?

The last page of Mark M. Hendershot's From the Archives of Lester J. Hendershot shows a materials list the transformers are described this way:
5:1 Ratio 24 Volt to 120 Volt Transformers
(Vertical Oscillator Type)
Red, Black, Blue, Green Coded Wires
I was thinking that since Lester used a magnet from a radar magnetron the transformers might also be from a radar display. Or they could be from a regular TV circuit of the 50's.

I've found several types of "vertical transformers" (vertical blocking oscillator transformer, vertical deflection oscillator transformer, and vertical output transformer) but I don't know, nor did I find what, if anything, makes them a special kind of transformer. It just seems to me since they were specified that way that there is something special about them.

I think Graham said in an earlier post that they were built on an E & I frame with a gap between the E & I laminations when assembled. I can see where that would affect saturation but I'm wondering if there are other characteristics that differ from a power transformer. Phase - are the primary and secondary in phase or 180 degrees out? Are the laminations made of a special material that might affect their permittivity? Is there anything else that makes them special?
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