Re: B/W HV Diode Replacement Question?

No, this ("A workable substitute for the Flyback for Ampliphone XY
monitors (and other XY games)") is not for substituting the picture
tube, it was a kludge (work-around) for the days when separate HV
power supplies did not exist and I had nothing to fix the old
Ampliphone HV section so I hacked in a working 4600 chassis. By the
way it is STILL running (about 15 years now).
(what he is referring to - http://www.flippers.com/vid-tips.html )

Others have found workable replacements for the tube (AIR), but I do
not have that info. Search the vectorlist archives...see the bottom
of this email to get there.

John :-#)#

At 9:08 AM -0600 3/7/06, Scott Caldwell wrote:
>John, based upon the Amplifone flyback section of that page, do I understand
>correctly and an 19" amplifone tube can be replaced with a WG4600 tube,
>without any type of modification. Mine has a small burned area in the middle
>and I'd love to put a non-burned tube in my Star Wars.
>
>Scott C.
>
>John Robertson wrote:
>
>>Don't forget to discharge the monitor first...and that the new HV
>>diode goes in the same way as the old one - one end has a band on
>>it.
>>
>>The HV diode on the B&W monitors can fail if the anode cap is
>>directly shorted to the aquadag/common/chassis. This can damage the
>>chain of diodes and leads to the blooming. We use a high voltage
>>probe in our shop to discharge ALL monitors...
>>
>>http://www.flippers.com/vid-tips.html#discharge
>>
>>John :-#)#
>>
>>At 4:46 PM -0800 3/6/06, Tom Cloud wrote:
>>
>>>Hello all,
>>
>>>
>>
>>>I have a 19V2000 BW monitor that is blooming. It was a NOS monitor
>>>when I bought it about 2 years ago. It was working fine until
>>>several months ago. It started to bloom. I've since pulled it out
>>>of my Battlezone game and put another monitor in it. I'm ready
>>>to try to fix this problem.
>>
>>>
>>
>>>I'd like to know how the heck to change this diode? I have the
>>>part, it looks like this:
>>
>>>http://www.arcadeshop.com/pics/hvdiode.jpg
>>
>>> I just don't know where it goes or how to install it. I've seen
>>>this diagram:
>>
>>>http://www.arcadeshop.com/pics/high-voltage-rectifier.jpg
>>
>>>It makes it look like it's inside this assembly like a fuse,
>>>spring loaded on both ends....
>>
>>>
>>
>>>I'm confused...?
>>
>>>
>>
>>>Any info would be appreciated.
>>
>>>Regards,
>>
>>>Tom Cloud
>>
>
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Received on Tue Mar 7 12:32:45 2006