Re: [OT(ish)] yoke question for experts-only!

From: John Robertson <jrr_at_flippers.com>
Date: Sat Dec 28 2002 - 13:10:09 EST

It appears that most colour tubes share the same pinout. The differences
are in the deflection angle and characteristics of the screen voltage and
biasing. That is why you can often drop a standard TV tube into a video
game and have success. Yokes vary a lot, so that can be a negative factor,
but if the resistance is fairly close on a yoke I try out the TV tube
(already converged!) and it's yoke in a Electrohome/WG chassis. This won't
work for XY as the yoke WILL BE WRONG (the tube might work with a change of
end plug for the tube). But does for Raster games in many cases. Cool...

John :-#)#

At 10:37 AM 28/12/2002 +0000, Dave Langley wrote:

>At 09:43 pm 24 12 02, you wrote:
>>-----Original Message-----
>>From: Mark E Davidson <mark@basementarcade.com>
>>
>> > Long story short... the
>> > chassis was a hacked up / burned up mess so I combined the tube / yoke
>> > from the Wico with the chaise from a WG 4900 series. Presto... New
>> > monitor. I have quite the combination of monitors now as I have done
>> > this at least 4 times each time with a different chaise to different
>> > series tube / yoke and only once did I run into a problem where the
>> > picture was mirrored on the screen requiring me to reverse 2 on the yoke
>> > leads.
>
>Interesting I have 2 almost new tubes, one from a WG 7300 and one from a
>Ducksan both had fires rendering the chassis useless ... (and both from
>pin2k games too!). Is there any information on the web detailing pinouts
>of particular tubes to ensure say a Ducksan tube and G-07 chassis have the
>same pinouts, or is it a question of try it and see. I'm loathed to end
>up frying a good chassis/tube on a whim.
>
>> > A tip.
>> > What swapping out the tube / yoke, do NOT move the degaussing coil
>> > with it. Retain the coil for the monitor board you are going to use. The
>> > coils are tuned to the board (learned the the hard way)
>
>Wouldn't the yoke need moving too, or would it be OK if they have the same
>(or close?) impedance?
>
>
>
>Dave Langley
>www.robotron-2084.co.uk
>
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Received on Sat Dec 28 10:12:10 2002

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