Salvaged from a "grand-daddy" valve oscilloscope which a Taylor Model 31A
Taylor Electrical Instruments were a designer & manufacturer of test equipment in England
The company was purchased by AVO in 1958 and eventually AVO (which was purchased by Metal Industries in 1959) was purchased by Thorn Industries. A lot of structural changes were occurring in the electronics industry at this time.
The equipment dates from the early 1950's! see the photograph to view this ugly beast in all its former glory.
After evaluation, I decided that full restoration of this Taylor scope was not a viable project so this is one of the parts I have removed, the CRT is NOT TESTED prior to removal.
Emitron Cathode Ray Tube
Emitron was a trading name used by EMI. Emitron were major manufacturers of CRT and Broadcast Camera Tubes.
British made
4 inch circular CRT with a 3.5 inch display area
White phosphor
Dimensions: 16 inches long x 3 inch neck (no taper)
NO rear pins as you would expect, this CRT used a special Socket & Plug connection arrangement (see photographs)
Nice brass plugs!
The only markings that can be found on the tube:
EMITRON
BVA
MADE IN ....(rubbed off)
88B ....43 handwritten (... indicate unreadable) - this could be the serial number
MIC (within an elongated diamond) and 0 are printed in black on the neck
Rear connection sockets are marked not with pin numbers but function designation
X1 Y1 G C H H A1 A2 Y2 X2 A3
Supplied with the connection plugs and even the original wiring with attached designation tags (in case these are useful to the user)
Taylor used these CRT tubes in their models 31A, 32A and 33A
Standard issue was a green trace but the customer could also order a blue trace.
This CRT produces a green trace.
EHT was 1200V
Deflection is electrostatic
Marketing material described the trace as "high brilliance"
Possibly useful as a replacement CRT in another Taylor 31A Oscilloscope, museum piece or for educational purposes - very easy to view the elements inside the tube.
