Re: working on a WG6100 HV

Andy, don't over think this one.

The biggest issue is that the anode wire is like a spring, and trying to get
it to stay where you want it, not to mention attached to the HV probe
without it flopping over to where it wants to go, can be frustrating.

25KV isn't going to jump across the table (unless your table is metal).

This is all high impedance / low current, so your readings will be fine.

Use common sense, don't check the HV like you did a 9V battery as a kid,
etc., and you won't have any problem.

Thanks,
-Mark

On Mon, Feb 7, 2011 at 10:14 AM, Andrew Welburn <andy@andysarcade.net>wrote:

> ok, but will the HV unit operate as it should if it were plugged into a
> tube? i assume so...
>
> Also, what about measuring the HV in this sort of setup, do you conenct
> your hv probe to the anode cup inside your mug to test and measure while its
> live?
>
> --
>
> Andrew Welburn
> http://www.andys-arcade.com
> ----- Original Message ----- From: "John Robertson" <pinball@telus.net>
> To: <vectorlist@vectorlist.org>
> Sent: Monday, February 07, 2011 4:07 PM
> Subject: Re: VECTOR: working on a WG6100 HV
>
>
>
> Andrew Welburn wrote:
>>
>>> hey all.
>>>
>>> I have all the bits from a WG 6100 to sort out, but i do not have the
>>> tube... there is a problem on the HV and i'd like to work on it and test
>>> it
>>> out/fix it, i have heard things in the past about people working on HV's
>>> when they're live and not connected to a tube by putting the anode in a
>>> jam
>>> jar (or ceramic cofee mug!) for example... it does sound a bit crazy but
>>> its
>>> not unheard of...
>>>
>>> Whats the consensus here, borderline safe/unsafe? should i just try and
>>> find a 19"
>>> tube (i don't have any) and just hook it up so that the hv has a tube to
>>> energise at least? Or
>>> can i wrestle the live anode like the croc hunter catching a large
>>> agitated
>>> snake?
>>>
>>> --
>>> Andrew Welburn
>>> http://www.andys-arcade.com
>>>
>>
>> Hi Andy,
>>
>> I've tested many a HV unit on the bench using my old ceramic mug as the
>> anode shield. There really isn't any risk as long as you are not moving the
>> HV unit around while it is powered up! You do not want the cable to pop out
>> of the mug while it is live - so turn it off to move to a new position, then
>> back on to do next test...
>>
>> There is no stored charge on the anode - no capacitor to hold it - so the
>> device is pretty safe to handle immediately after turning off the power
>> (watch for focus/screen voltages if any caps on those lines).
>>
>> John :-#)#
>>
>> --
>> John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 Call
>> (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, VideoGames)
>> www.flippers.com "Old pinballers never die, they just flip
>> out"
>>
>>
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>
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Received on Mon Feb 7 11:36:06 2011