Re: Tip: Bench Testing a WG HV Unit with a Single Ended Pwr Supply

G'day Curt,

I have had success working on a unit inside a machine, with
inserting the HV anode well inside a very clean and dry beer bottle,
making sure the anode is at the bottom of the bottle, then taping it to
be sure it stays that way...
I also made sure the bottle wasn't near anything else in case it tried
to arc out of the bottle through the glass to grounded metal, etc.
This was just a way I did it of my own devising, there may be issues with it I don't
know about, but it seemed to be the best insulation I could do to make it safe
at the time, and it worked ok for me.

Cheers,

Marc

----- Original Message -----
From: "Curtis H. Wilbar Jr." <vector@hawkmountain.net>
To: <vectorlist@vectorlist.org>
Sent: Sunday, September 14, 2003 9:14 AM
Subject: Re: VECTOR: Tip: Bench Testing a WG HV Unit with a Single Ended Pwr Supply

>
> If you don't have a tube connected to the HV, how do you deal with the HV,
> or do you just leave it disconnected, and away from anything it could
> arc to ?
>
> I've never dared to power up monitor HV without having something to
> connect it to.
>
> -- Curt
>
> >X-Authentication-Warning: westnet.com: majordom set sender to
> owner-vectorlist@vectorlist.org using -f
> >From: "Mark Shostak (DOS)" <shostak@augustmail.com>
> >To: <vectorlist@vectorlist.org>
> >Subject: VECTOR: Tip: Bench Testing a WG HV Unit with a Single Ended Pwr Supply
> >Date: Sat, 13 Sep 2003 12:20:53 -0500
> >MIME-Version: 1.0
> >X-Priority: 3
> >X-MSMail-Priority: Normal
> >X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2615.200
> >
> >Disclaimer:
> >
> >1) Don't mess with an HV unit unless you know what you are doing, um-K.
> *Lethal* voltages are present.
> >
> >2) This was my experience, your mileage may vary. If you try it and blow
> something up, don't cry to me.
> >
> >
> >I fixed an HV unit from a WG6100 this week, but didn't have a split supply on
> my bench to test with.
> >As I didn't want to drag an entire monitor frame and tube onto the bench, I
> needed a "better way".
> >
> >After looking at the schematics, it occurred to me that you should be able to
> run this thing
> >with a single ended supply. I tried it, and sure enough it worked.
> >
> >I simply tied V- to Gnd, and applied 35VDC across the V+ input, and the
> combined V-/Gnd input.
> >Total current draw was about 400ma.
> >
> >Be advised, this also puts 19.5KV, or in my case 26KV (yes, it had regulation
> problems)
> >on your bench, so take appropriate precautions.
> >
> >Hopefully this trick will make servicing these HV units easier for people.
> >
> >-Mark
> >
> >P.S. Does anybody know where you can find specs for the "68-2 F E" diodes (D901
> & 902)?
>
>
> Curtis Wilbar
> Hawk Mountain Networks
> vector@hawkmountain.net
>
> My e-mail is protected against viruses and spam by MailGuardian
> http://www.mailguardian.net
> Top notch protection at unbelievable prices
>
>
> ---------------------------------------------------------------------------
> ** To UNSUBSCRIBE from vectorlist, send a message with "UNSUBSCRIBE" in the
> ** message body to vectorlist-request@vectorlist.org. Please direct other
> ** questions, comments, or problems to chris@westnet.com .
>
---------------------------------------------------------------------------
** To UNSUBSCRIBE from vectorlist, send a message with "UNSUBSCRIBE" in the
** message body to vectorlist-request@vectorlist.org. Please direct other
** questions, comments, or problems to chris@westnet.com .
Received on Sat Sep 13 21:25:52 2003