1 Aug
2014
1 Aug
'14
1:41 p.m.
On Aug 1, 2014, at 4:19 PM, Rick Bensene <rickb at bensene.com> wrote:
Hello, all,
I am in the midst of restoration of a very old (1964-ish) electronic calculator called
the Wyle Laboratories Scientific Model WS-02. This is a transistorized electronic
calculator that uses a magnetostrictive delay line for register storage, and a CRT display
for showing the working registers and memory registers. The CRT is driven by sine/cosine
signals to generate fully-formed stroke-style digits. I don't know if it's
magnetically or electrostatically deflected...is there any easy way to tell? There are
some coils around the neck of the CRT, but they are not as large as I'm used to seeing
on CRT's of this size (8?).
If there are coils, it?s probably electromagnetic deflection. The other possibility would
be electrostatic deflection with electromagnetic focus, but that?s an unusual combination.
Also, a focus magnet would have just two wires; if you see 4 or more, that suggests
deflection coils.
Both work, though doing random signals as opposed to deflection sawtooth signals with
electromagnets is a bit tricky. CDC managed it, in the Cyber 170 series console (CDC
545). But their earlier (1964) console display was all electrostatic, twin 12 inch
displays with 100 watt UHF transmitter tubes producing the deflection waveforms.
paul