16 Jun
2014
16 Jun
'14
1:39 p.m.
On 06/15/2014 10:55 PM, Tony Duell wrote:
No taps, but extra windings for CRT filament.
OK... Does the filimanet look to be the nroaml brightness? You will ahv
eproblems measuring the CRT heater votlage, ist's a very 'peaky' waveform
which confuses most meters, even many true-RMS ones (it is, of cours,e
the RMS vlaue of the heater votlage that is important).
During preparation of the machine for VCFE i had a failure in the CRT's high voltage
part.
Yep, flyback burnt..
The high voltage winding was potted as a separate unit, enabled my to
rewind the flyback's primary (was burnt).
Are there only 2 windigns? What
about any taps on them? A single shorted
turn anywhere will cause problems. What fialed
after the few seconds? The output transistors?
The HV diode connection.... Primary
side is still OK.
Come to think of it, that might have caused the hissing.