A scope CRT for an IWATSU SS-3310 portable scope. The original
tube works but has loose parts inside that damaged a mesh electrode.
parts are about 4 mm and 2 mm in size. The phosphor has dints, too. The
but the screen image appears distorted.
The scope is from the early 1990s and Iwatsu from Japan did not respond
at all to service request.
Screen glas width
Screen glas height
Deflection pins from front
The tube has a rectangular screen with grid printed inside. It has a 14
4 side pins for deflection and a HV connector (acceleration).
Connector pins for horizontal deflection plates and the label are at
Pins for vertical deflection plates and acceleration HV at the right
side when looking at screen.
Type 95 probably means about 95 mm diameter, in fact the 91 mm.
31 is a standard green phosphor.
Deflection amplifiers work from 43 V, so the deflection constant is
something like 10 V/cm horizontal.
If you have a spare CRT or a broken SS-3310 with a good CRT, please
dieter (at) cadt (dot) de. If you know of a similar CRT that may fit,
please inform. For example the Tektronix SC502/SC504 CRT is a near hit,
except its screen glas is a little wide and high, and the deflection
pins are mirrored.