1 Aug
2014
1 Aug
'14
2:37 p.m.
On Aug 1, 2014, at 5:00 PM, Chuck Guzis <cclist at sydex.com> wrote:
On 08/01/2014 01:19 PM, Rick Bensene wrote:
Agreed. As for the high voltage supply, that should be ok as well.
Switching regulators, which are the current standard power supply type and have been for
10-20 years or so, often need a minimum load for correct operation. Sometimes that
minimum load is built into the supply; sometimes it is assumed to exist externally.
Older ?linear? regulator supplies, or unregulated ones, don?t need a minimum load, they
are ok with no load at all. High voltage supplies are typically unregulated, at least in
the kind of equipment discussed here. (You?d find regulated high voltage supplies in
other disciplines; for example, traveling wave tubes require kilovolt or above voltages
regulated to 1% or so.)
paul
... However, I'm
concerned about having the high voltage supply connected to the CRT
without any other connections on it? Could the high voltage supply
be hurt because it may be missing signals it needs to oscillate
properly? Could this hurt the CRT? I don't know enough about the
way this kind of stuff works to know if I could cause any problems,
either with the CRT, or the high voltage supply.
Not usually a problem for the CRT. With no heater voltage or drive signals, it basically
looks like a capacitor.