1953 sylvania 172k CRT and Chassis

[Biscuithead]

I am a stereo/turntable guy... I picked up the guts out of a 1953 Sylvania
172k console. The former owner turned the cabinet into a wet-bar. I am only interested in the mono turntable. Is there any value or interest in the CRT, the chassis and the mono tuner?

[Biscuithead]

oh, and what is that transformer with the two diagonal tubes coming out the top? Is that part of the power supply?

[Electronic M]

Location and price? Also this thread should be moved to the classifieds section.

The CRT if it tests good is probably the most valuable part...Some can fetch 75-200$. CRT value also depends on what the part number of the CRT is. There should be a sticker on the tube with two numbers [screen size] followed by two or three letters ending in P4[on monochrome tubes]. Not all CRTs interchange, and some are harder to get/in more demand than others.
Don't toss the chassis. While TV and radio chassis are not terribly valuable (unless there is a separate HiFi amp chassis which has decent value) the tubes transformers and other assorted parts on them are useful in restoring other sets, and the chassis may be useful to someone that wants to restore a set that is missing that chassis.

[Biscuithead]

Originally Posted by Electronic M

Location and price? Also this thread should be moved to the classifieds section.

The CRT if it tests good is probably the most valuable part...Some can fetch 75-200$. CRT value also depends on what the part number of the CRT is. There should be a sticker on the tube with two numbers [screen size] followed by two or three letters ending in P4[on monochrome tubes]. Not all CRTs interchange, and some are harder to get/in more demand than others.
Don't toss the chassis. While TV and radio chassis are not terribly valuable (unless there is a separate HiFi amp chassis which has decent value) the tubes transformers and other assorted parts on them are useful in restoring other sets, and the chassis may be useful to someone that wants to restore a set that is missing that chassis.

I will take a picture of that sticker on the CRT... and I started a thread in Classifieds...
Thanks Tom!

[wa2ise]

Originally Posted by Biscuithead

oh, and what is that transformer with the two diagonal tubes coming out the top? Is that part of the power supply?

That's the power transformer, and the tubes on top are rectifiers. The high voltage secondary is centertapped, and that wire comes out on the other side of the transformer. The winding that drives the tube filaments is likely centertapped, and that wire also comes out on the other side (this wire is the B+, which feeds into filter caps). From the grounded centertap, the current goes thru about 300V of windings, then one or both tubes, and then another 2.5V of filament winding, to reach the centertap wire that becomes the B+ source.

The reason for parking rectifier tubes atop the transformer was that TV sets had lots of vertical headroom inside their cabinets, but were crowded horizontally. So save some horizontal chassis real-estate and put those tubes atop the transformer. Also being atop the transformer puts these tubes, which get very hot, up in the air and away from other parts on the chassis.

Transformer manufacturers made these transformer/rectifier tube units as one of the items in their catalogs, and TV makers saw them as a single module for their assembly line workers to install, instead of two (transformer, tube sockets) and less wiring to do.

[Biscuithead]

Originally Posted by wa2ise

That's the power transformer, and the tubes on top are rectifiers. The high voltage secondary is centertapped, and that wire comes out on the other side of the transformer. The winding that drives the tube filaments is likely centertapped, and that wire also comes out on the other side (this wire is the B+, which feeds into filter caps). From the grounded centertap, the current goes thru about 300V of windings, then one or both tubes, and then another 2.5V of filament winding, to reach the centertap wire that becomes the B+ source.

The reason for parking rectifier tubes atop the transformer was that TV sets had lots of vertical headroom inside their cabinets, but were crowded horizontally. So save some horizontal chassis real-estate and put those tubes atop the transformer. Also being atop the transformer puts these tubes, which get very hot, up in the air and away from other parts on the chassis.

Transformer manufacturers made these transformer/rectifier tube units as one of the items in their catalogs, and TV makers saw them as a single module for their assembly line workers to install, instead of two (transformer, tube sockets) and less wiring to do.

Very cool... If no one wants this chassis, I might have to pull out that thing and get it glowing, just for glowing's sake...