Museum Hours:

Saturday 10-6

Sunday 12-5

Early Electronic Television

General Electric HM-225 Chassis

Here is the main chassis. It has been modified to remove the 6F8 oscillator/mixer and replace it with a 6J5 oscillator and a 6AC7 mixer.


The above photo shows the original oscillator/mixer tube (with a yellow wire to the grid cap).

The RF preamplifier, which was mounted inside the cabinet on the side. It has a 5 position switch to change channels, and a 6AC7.

The power supply chassis, containing the 400v and 4000v supplies.