906
3" Cathode Ray Tube for oscillosope use.
circa 1930's
closeup of deflection plates and electron gun.
The 906 is essentially a 3AP1 with clear glass envelope.
908
3" Cathode Ray Tube for oscilloscope use.
Circa 1930's
Similar to 906 and also has clear envelope.
Selling price in 1948 $15.00
3AP1 3" Cathode Ray Tube
Selling price in 1948 $13.00
3BP1 3" Cathode Ray Tube
Selling price in 1948 $15.00
Sylvania 3JP12 3" Cathode Ray Tube
Selling price in 1948 $18.75
Sylvania 3ADP1 3" Cathode Ray Tube
RCA 3KP1 3" Cathode Ray Tube
Selling price in 1948 $13.25
RCA 3DP1 3" Cathode Ray Tube
Dumont 3WP1 3" Cathode Ray Tube
RCA 3HP7 3" Cathode Ray Tube
953 3" Cathode Ray Tube
This one was removed from an auto ignition analyzer that was given away to garages as a promotion by one of the spark plug companies back in the 50's.
Mullard DG7-32
3" CRT
Phillips 3NP4
3" projection tube.
Fairchild K1887P31 3" Cathode Ray Tube
Tek T317P2 3" oscilloscope Cathode Ray Tube.
Tek 154-0705-53 3" oscilloscope Cathode Ray Tube