Re: G05 tube ground question

What you would get is a hell of a jolt if you touched the outside of the
tube....plus a poor beam drive, the intensity should be rather low...I'd
try it but I don't like risking my neck or the monitor electronics on a
flash-over.

Usually a bad focus is a result of a bad focus control...or the HV is not
stable, measure it with a HV meter at the anode connection under the rubber
cap.

I've seen a bunch of HV probes for fairly good prices on eBay lately, get
one with a built in meter...

John :-#)#

At 02:38 AM 03/05/2002 -0500, Rodger Boots wrote:

>Could do that, I suppose. Without the outside of the tube grounded the
>high voltage would be unfiltered and would vary all over the place.
>That could screw up focusing.
>
>
>kegowland@cs.com wrote:
> >
> > If the DAG is not attached correctly or not present, would this cause
> an effect of the picture being out of focus? I have two WG 6100's that
> display an image but after a few moments the image is fuzzy, like looking
> through a frosted window. I tried different HV and deflection boards and
> get the same result.
> >
> > Kirby
> >
> > John Robertson <pinball@telus.net> wrote:
> >
> > >The 'aquadag' coating on the outside of the picture tube must be connected
> > >to the monitor chassis common for the tube to charge up correctly...it is
> > >only a giant glass capacitor after all, a few ufd at 20Kv...you can use a
> > >spring if you like, but it must make a good contact to the tube
> coating and
> > >cover a few square inches. A better solution is to get a piece of braided
> > >wire and run it across the rear of the tube with a spring to keep the
> braid
> > >from touching the yoke. Then solder a jumper wire that can be either
> > >soldered or screwed to the chassis common.
> > >
> > >John :-#)#
> > >
> > >At 08:08 PM 02/05/2002 -0400, Curtis H. Wilbar Jr. wrote:
> > >
> > >
> > >>Had this embedded in a longer post... so for those that have seen it
> > >>sorry for the duplication, however I think some people may not have seen
> > >>it because it was embedded in a longer post...
> > >>
> > >>My Electrohome G05-801 (Asteroids) metal "strap" used for groudning
> > >>the monitor tube is rotted off (found a piece of it in the bottom of the
> > >>game).
> > >>I don't see a wire floating around, but I assume that this strap is used
> > >>for grounding the back coating on the monitor tube.
> > >>
> > >>What are the issues with this not being grounded...
> > >>I've seen some monitors (like amplifone) use a spring to ground that
> coating
> > >>to the monitor frame. Would that be one way of rectifying the rotted
> > >>off strap ?
> > >>
> > >>Thanks in advance,
> > >>
> > >> -- Curt
> > >>
> > >>
> > >>
> > >>----------------------------------------------------------------------
> -----
> > >>** To UNSUBSCRIBE from vectorlist, send a message with "UNSUBSCRIBE"
> in the
> > >>** message body to vectorlist-request@synthcom.com. Please direct other
> > >>** questions, comments, or problems to neil@synthcom.com.
> > >
> > >-----------------------------------------------------------------------
> ----
> > >** To UNSUBSCRIBE from vectorlist, send a message with "UNSUBSCRIBE"
> in the
> > >** message body to vectorlist-request@synthcom.com. Please direct other
> > >** questions, comments, or problems to neil@synthcom.com.
> > >
> > ---------------------------------------------------------------------------
> > ** To UNSUBSCRIBE from vectorlist, send a message with "UNSUBSCRIBE" in the
> > ** message body to vectorlist-request@synthcom.com. Please direct other
> > ** questions, comments, or problems to neil@synthcom.com.
>
>---------------------------------------------------------------------------
>** To UNSUBSCRIBE from vectorlist, send a message with "UNSUBSCRIBE" in the
>** message body to vectorlist-request@synthcom.com. Please direct other
>** questions, comments, or problems to neil@synthcom.com.

---------------------------------------------------------------------------
** To UNSUBSCRIBE from vectorlist, send a message with "UNSUBSCRIBE" in the
** message body to vectorlist-request@synthcom.com. Please direct other
** questions, comments, or problems to neil@synthcom.com.
Received on Fri May 3 08:52:36 2002