5 Aug
2014
5 Aug
'14
7:06 a.m.
Meta-request - could whoever's software is generating syntax errors
like
References: <B9639BAE3F34504E83FEEDD71D4AFB465AF81A
at mail.bensene.com> from
"Rick Bensene" at Aug 4, 14 11:12:37 am <m1XEQrF-000J4iC at p850ug1>
possibly fix/replace it?
Are there any
pins coming out the side of the CRT neck [...]
There are no pins or connections
coming out of the side of the neck
of the CRT. There are a total of six pins used on the CRT.
Clearly, two of these are for the heater supply. If
it's magnetic
deflection, via the coils on the neck of the CRT, what would the
other four connections at the end of the CRT be?
Well, a 3RP1 (a 'scope tube I have an example of) is a 12-pin tube.
Two of them are documented "Internal Connection - Do Not Use". The
others are:
- Heater (two pins)
- Cathode
- Grid #1
- Anode #1
- Grid #2 & Anode #2
- Deflection electrodes (four pins)
(I'm not sure, but I think grid #1 is intended to be used for
brightness control and anode #1 for focusing.)
So I'd hazard a guess that three of your mystery four pins are cathode,
acceleration/brightness, and focus. The fourth might be unused (though
you said "used", so probably not) or might be something else, maybe
more acceleration or focus.
I suppose there's no reason a CRT _couldn't_ use a filament instead of
a heather-and-cathode, but I'd be surprised.
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