Re: Re: Bulk buy on Wintron flybacks

On Thu, 18 Apr 2002 02:04:01 -0500, Rodger Boots <rlboots@cedar-rapids.net>
wrote:

>Zonn wrote:
>>
>> On Wed, 17 Apr 2002 16:18:16 -0700, John Robertson <pinball@telus.net> wrote:
>>
>> >Yes, no, maybe.... ;-) Revisions cost time/money. I'll see though. Would it
>> >be better to cut out if one of the two deflections fails? Or only if both
>> >croak? As I anticipate this will draws it's power from the deflection
>> >supply, if the Positive supply fails then so would the HV cage.
>> >
>> >An LED on the cage would be nice to show that at least it has some power...
>>
>> Let me ask this, would this power supply have the 25kv over voltage protection
>> required by law? If so, this would be a good place to add more disable logic
>> since there is logic already there to disable the supply.
>>
>> If it doesn't, then this supply could not be used in build new monitors, though
>> as a hobbyist HV supply, it can probably be sold, since at that point you are
>> offering just an HV supply, and the buyer can do whatever they want with it --
>> though people buying these should be careful to set the voltage below 25kv when
>> installing them. Voltages above 25kv generate X-rays.
>>
>> -Zonn
>
>
>Voltages above 16,000 generate X-rays, color CRTs have leaded glass to
>control that.
>
>The power supplies being replaced seem to be mostly 19.5 KV. If they
>make it to 25 KV X-rays won't be the only problem!

I read the 25kv level at a number of places, the most recent being:

 <http://www.jmargolin.com/xy/xymon.htm#High Voltage Power>

Maybe the law reads "With a leaded glass CRT the maximum voltage allowed is
25kv", who knows, but that does seem to be the magic number the CRT HV supplies
use to shut themselves down.

The gold box supply from Keltron used in the Cine monitors is rated at 16kv, so,
do B&W monitors have leaded glass?

-Zonn
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Received on Thu Apr 18 17:46:59 2002