Setchell Carlson Roundie save!

[Phil Nelson]

What a fascinating set. Instead of doing a straight copy-cat clone, they gave some real thought into improving the design.

The detail page at in the brochure at http://www.earlytelevision.org/pdf/S...n-brochure.pdf states that there are two contrast controls (Contrast 1 and Contrast 2). Anybody know why?

Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html

[hi_volt]

Me likey! I love that it is an unusual set. The chassis design is fascinating. Great save!

[Kevin Kuehn]

I don't see anything on the service info that indicates there are two contrast controls. There is a Detail(sharpness) control, so maybe that's what they intended to say?

[Tom9589]

I noticed the same thing, Kevin. Both the Sams and the SC service data calls one control contrast and the other control detail. The contrast control is in the second video amp stage and the detail control is in the final video output stage. Since the video output stage control has a capacitor in the circuit, the gain will be vary according to the frequency; hence, giving the higher frequency signal more gain and better fine detail. I also noted that SC uses a 1N60 diode in the video output stage for DC restoration. That may be another reason that SC produced a better picture than the RCA.

[wa2ise]

Originally Posted by Olorin67

I like where they put the convergence controls, these sets are truly a serviceman's dream.

More likely they did that to make convergence easier and quicker in the factory.

[Username1]

Very interesting tv indeed ! I can't wait to see what you discover with the contrast
controls... I'm also thinking one is a "sharpness" control.....
And on the speakers. They appear to be wired in parallel, So I would have to
say they are both full range speakers, not one 6" whoofffer, and one 6" tweeeeter...
Parallel would account for the better amp design you noted, a little more
power to drive the parallel speakers.... Good luck, looks
like a keeper to me !

.

[jr_tech]

Originally Posted by Username1

And on the speakers. They appear to be wired in parallel, So I would have to
say they are both full range speakers, not one 6" whoofffer, and one 6" tweeeeter...

I'm guessing that the one that is designated as a tweeter has a small "whizzer cone" in the center and the other does not... just a wag, however.

jr

[ChrisW6ATV]

Very cool set!

Originally Posted by WCF720

To the best of my knowledge, SC ceased TV production in the early 70’s.

Originally Posted by wa2ise

Setchell Carlson... made video monitors back in the late 70's.

Setchell-Carlson, which later had the names Audiotronics and Dotronix, made very good B&W and, later, color monitors (and may still be making some, in fact):

http://www.dotronix.com/

I installed a bunch of Dotronix and Sony color monitors for an airport baggage-claim display system in 1999. While the Sonys were dropping like flies within five years (bad capacitors, then bad CRTs), almost all of the Dotronix ones just ran and ran for 10+ years, 24 hours per day, most needing only a few adjustments over that period. Their 1979-to-late-1980s B&W monitors made with the modular chassis designs (in 9" and 23" sizes) also often ran for 10-20 years with relatively few repairs (other than CRTs, which did need replacing more often).

Would I have jumped on that ad, and driven for hours to buy that S-C color set? You bet I would! (The face is green with envy.)

[zenithfan1]

These are fun! Keep us posted. I can't wait to start restoring mine.

[broadcaster]

You found a winner! Those sets are better in my opinion than many of the RCA sets. The unitized construction eliminated the need to lug the entire set to the shop if you had spare modules. I was a SC dealer at one time, and had many satisfied customers.

[MRX37]

Originally Posted by Steve K

Here is the dealer sheet showing what I thought was your set. However, there are only two knobs on the bottom and not three like your set.

Steve

The child in your picture looks rather displeased. She's like "Are you guys done yet? I wanna go outside and play!"

In fact I'm kinda surprised they used that facial expression. Wouldn't you want a picture of somebody smiling in your ad?

[dieseljeep]

Originally Posted by MRX37

The child in your picture looks rather displeased. She's like "Are you guys done yet? I wanna go outside and play!"

In fact I'm kinda surprised they used that facial expression. Wouldn't you want a picture of somebody smiling in your ad?

It might've been the owner's daughter.

[Carmine]

Very well thought-out and made. I'd love to give one of those a home.

[MRX37]

So I decided I wasn't pleased with the ad for that TV and decided to put something else on the TV's screen.

]


Then I thought maybe the TV should show off how good a picture it has...


]

[Electronic M]

Originally Posted by MRX37

So I decided I wasn't pleased with the ad for that TV and decided to put something else on the TV's screen.

]


Then I thought maybe the TV should show off how good a picture it has...


]