1948 TV Ads

I scanned several ads from the October 1948 issue of Radio and Television Retailing magazine. These ads were aimed at potential retailers/dealers. A few rare names in there. Hope you all enjoy!

[tvtimeisfun]

It would be nice to have those actual sets in my collection but maybe 1 day who knows great ads though...Timothy

[Eric H]

These are great! Some of those sets seem to be non existent now.

Neat to know that Stewart Warner was known as "The New Yorker" that's the set I just found the knob for.

[decojoe67]

Thanks for posting those ads.
Many years ago I had a large stack of Radio and Television Retailing magazines from the '40's and when I was moving decided to just cut out the ads!
Well, I made a few great scrap books with them and still enjoy browsing through them today!

[dieseljeep]

We never saw those East Coast makes in the Mid-West.
The only place I saw them was in Riders. Some of those makes weren't even covered in Sams.
Anything that was too expensive, didn't sell too well in Wisconsin, except in the later years.

[bandersen]

Has anyone ever heard of "Zetka" television tubes before ? I wonder if their 15" was the same as Dumont's 15AP4 ?

Originally Posted by bandersen

Has anyone ever heard of "Zetka" television tubes before ? I wonder if their 15" was the same as Dumont's 15AP4 ?

Bob, somewhere I've run across that name before in another ad, but I can't remember where. When I find it I'll post it.

Many of the ads from the late 40's-early 50's were for CRT makers, so I know many of them were supplying OEM set makers too. It's like any business, when it first starts out there's lots of competitors and people trying to get in the game. After a few years they dwindle down considerably.

[wa2ise]

"High Definition"! Well, compared to that system that used Felix the Cat. I suppose...

Originally Posted by bandersen

Has anyone ever heard of "Zetka" television tubes before ? I wonder if their 15" was the same as Dumont's 15AP4 ?

Here's what I can find on Zetka CRT's: their 15 inch flat face tube was a 15CP4, but was similar to Dumont's 15AP4 with an ion trap.

Zetka did supply other makers, but I can't find out who specifically. They were the first to make an all glass 16 inch tube, the 16DP4, where before there was only the metal cone version.

Zetka started around 1927 as a radio tube maker. In 1946 they were bought by U S Television Corp. but apparently remained a separate company. A guy named Hamilton Hogue was president of both companies. In 1950 they bought the patents for a color tv tube from a company called Sightmaster Corporation. Apparently nothing became of that and they soon disappeared along with UST.

I did find a report that UST started selling TV sets through Macy's in 1946.

Correction

[David Roper]

I scarcely imagine it could be any other tube.

[StellarTV]

I'm kinda digging that DeWald High Hefinition set. Maybe it's about time for me to make the HD transition...

[bars&tone]

Very enjoyable. Thanks for posting.

[wa2ise]

Originally Posted by StellarTV

I'm kinda digging that DeWald High Hefinition set. Maybe it's about time for me to make the HD transition...

In theory, it should be possible to modify the horizontal deflection circuits to run at higher scan rates. 480p (31KHz) should be doable, though going for 720p (43KHz) may be harder. If I could make 480p happen, it's an easy hop to 1080i (32KHz). Oh, the flyback times would stay about the same as for NTSC deflection rates, but that is almost a feature to make the picture be 4:3 as the sides of the picture would get clipped off, aka overscanned. The faster deflection rate probably demands more power than NTSC rates to make the picture the same width. The vertical would not need to be modified. The video amp stage may need more bandwidth, and remove the 4.5MHz sound trap and takeoff.

You would feed it with baseband HD luma directly, not thru the tuner and IF strip.

Anyone up for HD B&W?

[David Roper]

Originally Posted by wa2ise

In theory, it should be possible to modify the horizontal deflection circuits to run at higher scan rates. 480p (31KHz) should be doable, though going for 720p (43KHz) may be harder.

Modifying early postwar sets to show CBS color (29.16Khz) was only just barely "doable" if that's any gauge. John Folsom's CBS RX-43 prototype (really an RCA 9T24X) on working display at the ETF in 2004 was pushing the horizontal sweep output so hard that it had little red spots on the plate. This was apparently unavoidable in "normal" operation.

[rld-tv01]

I was looking at my long eBay watch list on saw this United States Television (UST) projection set that has been on eBay for awhile now. Its on the wrong side of the US from me and a little high priced but its good to see some rare sets pop up for sale once in awhile.

http://www.ebay.com/itm/350884203437...84.m1423.l2649.