Early B&W? or color?

[old_tv_nut]

Here's a postcard advertising TV service using RCA tubes, using a picture of part of the bottom of a chassis.

The puzzle for all you experts is: can the chassis be identified?

[dieseljeep]

Originally Posted by old_tv_nut

Here's a postcard advertising TV service using RCA tubes, using a picture of part of the bottom of a chassis.

The puzzle for all you experts is: can the chassis be identified?

It looks like a KCS81, or simular from the 1952-53 era. I see the two 5U4 sockets near the power transformer.

[radiotron]

its a b/w

[N2IXK]

On the upper right side, it appears that there is one ceramic octal socket on that chassis?

Seems out of place on a mass-produced consumer item like a TV set. Usually you only see those on military and industrial gear...

[John Marinello]

Hint: 15-20 electron tubes.

[dieseljeep]

Originally Posted by N2IXK

On the upper right side, it appears that there is one ceramic octal socket on that chassis?

Seems out of place on a mass-produced consumer item like a TV set. Usually you only see those on military and industrial gear...

I don't know why they used them, but they did! They were also shock-mounted. They probably got a good buy on them, so why not.

[N2IXK]

Originally Posted by dieseljeep

I don't know why they used them, but they did! They were also shock-mounted. They probably got a good buy on them, so why not.

Which tube was installed in it? Presumably the shock mounting was for microphonics?

[Einar72]

I believe, IIRC, it was the Horizontal oscillator. My KCS-47 Fairfield had that arrangement.

[old_tv_nut]

Originally Posted by John Marinello

Hint: 15-20 electron tubes.

I saw that, but there is no reason the text would correspond to the picture.

I suspected B&W anyway.

One more thing - a trimmer cap under the chassis doesn't seem like an optimum design.

[cbenham]

Originally Posted by old_tv_nut

I saw that, but there is no reason the text would correspond to the picture.

I suspected B&W anyway.

One more thing - a trimmer cap under the chassis doesn't seem like an optimum design.

It's not a Muntz--Too many parts.

Cliff

[wa2ise]

Look at all those wax caps and bumble bees! That will keep you busy recapping this post card.

[Eric H]

It looks too crowded for an RCA chassis, I wonder if they added some extra parts to make it look more impressive?

[dieseljeep]

Originally Posted by Eric H

It looks too crowded for an RCA chassis, I wonder if they added some extra parts to make it look more impressive?

It looks like one of the 5U4's is missing.
I have one of those sets in line to recap. There's a lot of them in there, and 'lytics as well.

[kx250rider]

Definitely B&W and early 50s; maybe late 40s. I see the horizontal oscillator transformer mounted under the chassis next to the two trimpots for horizontal stab. & linearity, if I recall what those do.

Charles

[Penthode]

Look at the attached. Does it look familiar?

I recognized it as an RCA from the early 50's. It actually is a kcs68 circa 1951. Note the position of the tubes. Incidently I looked to schematic to find that badly mounted trimmer capacitor is actually across the over-coupled transformer link at the input of the first video IF amplifier. And the ceramic tube socket was used by all the RCA's of the period for the horizontal oscillator tube. I believe it was one of the best designed B&W TV sets ever built (apart from that lousy trimmer!)