Early Television
  • What's New
  • About Us
  • Classifieds
  • Parts for Sale
  • Resources
  • Index
  • Search
  • Contact Us
 
 
  • Mechanical TV
    • Gallery
    • Database Summary
    • Sets at the Museum
    • Restoration
    • Broadcasting
    • Advertising
    • Roger DuPouy's Site
    • Peter Yanczer's Site
    • Gerolf Poetschke's Site
    • Eckhard Etzold's Site
  • Early Electronic TV
    • Gallery
    • Database Summary
    • American Sets at the Museum
    • British Sets at the Museum
    • Restoration
    • Broadcasting
    • Technical Information
    • Other Equipment
      • Antennas
      • CRTs
      • Test Equipment
      • VHF Boosters
    • Advertising
    • Gerolf Poetschke's Site
    • Eckhard Etzold's Site
  • Postwar TV
    • American Postwar TV
    • British/European Postwar TV
    • Postwar TV in the Rest of the World
    • Restoration
    • Postwar Broadcasting
    • Technical Information
    • Other Equipment
      • Accessories
      • Antennas
      • CRTs
      • Test Equipment
    • Advertising
    • Eckhard Etzold's Site
  • Early Color TV
    • Gallery
    • Database Summary
    • Color TV Systems
    • Sets at the Museum
    • Restoration
    • Broadcasting
    • Technical Information
    • CRTs
    • Advertising
    • Pete Deksnis's Site
    • Ed Reitan's Color Television History
    • Eckhard Etzold's Site
  • CRT Rebuilding
    • Rebuilding Tubes at the Museum
    • Donations
  • The Foundation and Museum
    • Early Television Foundation
    • About the Museum
    • Directions to the Museum
    • Friends of the Museum
    • Equipment Donations
 
Early Television
Early Television
Early Television
Early Television
Early Television Early Television

Early Color Television

Sentinel IU-816

Early Television

 

(click on picture for high resolution image)

Technical information

The set was made in 1956, and has a 21AXP22 round picture tube. The chassis is similar to the RCA CTC-4.

Here is what Ed Reitan says about it:

The design is the "Licensee Labs Design" (as I call it) that was made by Gilfillan, Raytheon, and many others.  There are major differences in the IF strip (4 stages instead of 3), Sound, Color Demodulation, and tube types (standard tube types were used instead of that odd CTC-4 6AZ8) 

It is fully documented in LB-962, "A SIMPLIFIED HIGH-PERFORMANCE 21-INCH DEVELOPMENTAL COLOR TELEVISION RECEIVER" [24pp. + foldout schematic, C-73685D CRT], September 16, 1954

Our set was found at an estate sale in Michigan, and donated to the museum by Darryl Hock.

Here are Darryl's comments:

It was in a very upper end part of town with large mansions all around. The house was built in 1951, so the custom built in DuMont was original to the house. The Sentinel looks like it was purchased by them in 1956, placed in the game room, and never moved. It still has many original Sentinel tubes with 43rd week 1955 and 13th week 1956 date codes. The CRT is the original 21AXP22 with a date code of 17th week 1956. I was surprised when one of the workers for the sales company told me they plugged it in and the set worked with a good picture. Sure enough they had a set of rabbit ears from a modern portable set sitting on top.

Curiosity got the better of me, and I decided to check the crt. With only 1 minute warmup, all three guns were at the top of the scale with the red actually being the strongest! This set could not have been used much.

 

Early Television

Early Television

Early Television

Courtesy of Jeff Skolarus

Invisible text to format smartphones. xxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxx xxxxxx xxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxx


 
Advertisement
 
Early Television Museum
5396 Franklin St., Hilliard, OH 43026
(614) 771-0510
info@earlytelevision.org