General EGeneral Electric HM-171 and HM-185 Tube List

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
Pre-1945 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 Electronic Television

Television: Three channel (50-90 mHz) superhetrodyne. 5 inch CRT (5BP4) tetrode. Electrostatic focus and deflection, approx. 30 degrees.