• 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

Daven Disks

This is a T-468 "Tri Standard" disk. It has three sets of holes: 24, 36 and 48 lines.

T-24. 24 line disk. Abouty 14 inches in diameter

Donated by Mark Fliegel

From Walter Rowan 1929 catalog

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