Heater boosting update.

From: jpero_at_sympatico.ca <(jpero_at_sympatico.ca)>
Date: Mon Jun 11 18:07:10 2001

> > From: ard_at_p850ug1.demon.co.uk (Tony Duell)
> > Subject: Re: sync on green to horizontal and vertical wiring seperator.
> > To: classiccmp_at_classiccmp.org
> > Date: Tue, 12 Jun 2001 00:50:03 +0100 (BST)
> > Reply-to: classiccmp_at_classiccmp.org
> >
> > If it comes from the flyback anyway. try winding a couple more turns
> > round the flyback core and putting them in series with the existing
> > heater supply winding. One way will reduce the heater voltage (and may
> > even cause the screen to go blank), the other way will boost it.
> Tony,
> Got right direction of turns first try, Just two turns too much!
> Got nice bright orange glow like electric stove coil on full without
> pot sitting on it and super-bright raster lines! Whoa.
> Will try one turn even just a pass through.

Final update,

PERFECT!! One turn is all it needed, about right orange glow from
heaters. And small adjustment to screen pot, finish the focus pots,
there are two. Done.

Happy now and now enjoying it that able to see clearly and more
sharper. Converage is perfect on this one.

Question, now that I done it, overdriving the heater by one turn,
have not yet have a way to measure the actual heater voltage, remind
me what kind of equipment to measure this? I don't think going at
8V, I think bit less. Should not make that tube life much
shorter. Maybe a year or two?



PS: AppleColor High Resolution RGB Monitor, M1297.
Received on Mon Jun 11 2001 - 18:07:10 BST

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