Vectrex monitor fixable ??

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looks like i mentioned the wrong contact point after all. only do this mod if you are replacing the original 6.3v heater tube with a tube that has a 12v heater.
the original tube really is a 6.3v heater although real world measurements put it around 7.1ish volts
 
hmmmm, maybe im reading the diagram wrong but isnt this still showing ... clipping R529 and Jumping EP104 to EP503,... which contact point has changed ?
I ended up finding a old 9" B&W RCA AER095. i havent had a chance to open it up yet, and i have no idea if it is even compatible ... but it is portable with a battery and i think also a car cig lighter so im assuming its 12v.
 
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