Re: Continuous HV crackle in Tempest monitor

I worked on a 6100 a couple of months ago that was crackling. Inside the
HV cage I found a badly burnt resistor, can't remember which one, but it
was totally blackened. Originally I had written the crackling off to that,
until I believe someone here or on rgvac posted that they had a cap inside
the cage that had gone bad and was crackling.

Either way, if you do some p.m. inside the cage it will probably clear
up. I replaced the resistor while doing a rebuild on the monitor, so
there's no telling which one was crackling. I used Bob Robert's 6100 cap
kit, and 6100 additional parts kit. The resistor that burned was not
included in those kits, so I just picked some up locally.

Richard

At 11:20 AM 5/30/00 -0700, you wrote:
>Hello all. I'm a long time reader but don't post very often (only when
>I need help). Anyway...
>
>I just had the back off my Tempest and noticed that the HV cage was
>quite noisy. Its not a whine but a crackle (sort of like what you hear
>when you first power up a monitor but its continuous). I never noticed
>this before, is it normal? Any suggestions? I did just move the
>machine (from home to work) but it could have been that way before.
>
>I have to say that the image is perfect since I finally got around to
>ever-so-slightly putting it out of focus. It really looks great.
>
>This is a standard monitor + LV2000 + Zannen Kit. When I first got it
>a couple of years ago it was dead but I got it up and running with the
>help of the Vector list (cracked joints/traces, thanks again). I am
>concerned that I don't recall going through the adjustment procedure
>for the pot in the HV cage (it may be that I didn't replace it, I just
>don't remember).
>
>Thanks.
>
>Dan Rasmussen
>
>
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Received on Tue May 30 14:46:34 2000