New-to-me Sony Trinitron KV-1710

[JohnCT]

Originally Posted by Popester

Price of tv then was a bunch of money in ‘70 or ‘72. At least it was before the troubled SG613 gated switch design that most techs hated working on.

I liked those models, it was the earlier ones that were the nightmares. We were one of only two shops in our city that would work on Sony TVs.

The thing with the Sonys was that you could NOT use anything but a Sony part for the SG613 horiz output, the 2SC867A regulator (God, I can't believe I still remember those numbers) and the damper diode (which I have forgotten, but it was huge and metal cased).

When the horiz output shorted, it always shorted the regulator which was a series/pass arrangement. If you put in just a new SG613 without changing the regulator, it would blow immediately because the regulator pumped full B+ into it.

These parts weren't cheap but if you changed all three at the same time using Sony parts, resoldered the horiz drive circuit, recapped the vertical circuit, you wouldn't see them back for at least three years. Lots of techs tried using HEPs, SKs, ECGs, etc. but it was a futile effort. Use Sony parts or *boom* and smoke would be the result.

John

[damen]

Some of those Sony antennas came with this connector that just plugged into those binding posts.

[damen]

The connector unsnapped from the wire so you could also connect regular 300 ohm twin lead to it.

[AdamAnt316]

Originally Posted by etype2

In 1970-72, the largest TV consoles were 23 and 25 inches.

I was aware of that, plus the fact that at least some of those 23" sets had originally been classified as 25" before an FTC(?) ruling regarding visible size. I was wondering more about smaller tabletop/portable sets like this one. When I was growing up in the '80s and '90s, most of the smaller tabletop color sets were available as 5", 13" and 19", and I don't recall seeing many sets in between, yet that ad shows 15", 16" and 17" sets as well. I'm wondering when the (relatively) odd portable sizes went away, and things became more homogenized.

Originally Posted by damen

Some of those Sony antennas came with this connector that just plugged into those binding posts.

Originally Posted by damen

The connector unsnapped from the wire so you could also connect regular 300 ohm twin lead to it.

Very interesting! Can't say I've seen one of those before. I'm guessing the pin connector which came with the AN-14 on this set got broken at some point, and the owner removed it and stripped the ends of the twin-lead.
-Adam

[zeno]

QUOTE I was aware of that, plus the fact that at least some of those 23" sets had originally been classified as 25" before an FTC(?) ruling regarding visible size. I was wondering more about smaller tabletop/portable sets like this one. When I was growing up in the '80s and '90s, most of the smaller tabletop color sets were available as 5", 13" and 19", and I don't recall seeing many sets in between, yet that ad shows 15", 16" and 17" sets as well. I'm wondering when the (relatively) odd portable sizes went away, and things became more homogenized. END QUOTE

Sony color started with a 12" then 8,15, 17, 19 over the 1970's.
Tube built USA sets were 14", 16", 19" then bigger ones.
When they went solid state 13", 15", 17" & 19"
Almost all sizes up to 27" were built over the years after 27" a few
sizes were skipped.
Canada kept the old system so a 20" set was actually a 19" almost every
where else. There was a class action suit over all this with computer
monitors. IIRC you got $10 or something if you filled out the form. I did get a rebate.

73 Zeno
LFOD !

[Popester]

AdamAnt316, this was Sony’s earliest attempt at a larger tube size. I don’t think a 19” size came out for another couple of years. First color Sony was the 7” KV-7010U with the chromatron tube than shortly after that was KV-7010UA and than this had the trinitron tube. After that they only had a 12” size. So when the 17” size came out that was a big deal. Sony also had a 15” size. And as there technology progressed we saw larger and larger sizes. 19”, 26”, 30”, and upward. Smallest tube size a trinitron ever had was a 3.7” KV-4000 line that was released in ‘80 I think. Anyway, you have a real nice keeper representing an interesting time in television. May it bring many enjoyable hours of watching enjoyment for you.