[Fwd: Re: [Heathkit] SB-610 Monitor Scope]

Sun, 01 Jun 2003 02:54:07 -0400

    I think the high Voltage and/or focus Voltage, (normally developed from
the high Voltage) is changing as the horizontal sweep progresses across
the screen.
This could be from poor bypassing in the B+ circuit/s.  A 'scope should
be able to observe B+ and (through a very high Voltage capacitor) the
focus Voltage.  Or you could bypass each circuits at the original filter
capacitors until you see an improvement.  (With the appropriate value/s)
   Actually unless you are working on a shoe string, replacing every
electrolytic capacitor because they are all more than 10 years old.

<
   The issue is that the CRT's horizontal trace (with no signal input) is very
sharp & crisp on the left side of the tube and gets less sharp and somewhat
thicker n' fuzzier as it approaches the right side. No adjustment of the
intensity or focus controls on the front panel will correct the "fuzzy"
right side of the line trace.
snip
   Anybody got any ideas on how to make the CRT's trace sharp and even in
thickness all the way across the display ?
-- 
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