31 Jan
2006
31 Jan
'06
3:33 p.m.
On 1/31/2006 at 11:06 PM ard at p850ug1.demon.co.uk wrote:
The method generally used on TV tubes of the period
(and I don't see why
monitor tubes would be any different) was something like :
1) Over-run the heater. Typically a 6.3V heater would be run at 8V or 10V
In the old monochrome days, servicemen used to install "brighteners" inline
with the CRT socket. Usually just an encapsuled transformer set to give a
selectable boost to the heater. Bottles were expensive back then--now we
just throw the set away, it seems.
There were also jigs for popping inter-electrode shorts (usually due to
some cathode material flaking off and falling on the electrode supports.
Basically, you located the shorted electrodes and applied a charged
electrolytic to them. Most of the time, it worked. I've heard of, but
never tried, doing the same thing to revive NiCd cells with internal
shorts.
Cheers,
Chuck