Sanwa monitor question

[bonehead]

I am trying to find the pin for the red colour on the tube knec. I have no red on the picture and have tried transistor and pots to no avail so was going to try a quick short of the red pin to earth to determine if the chassi is at fault or have another tube gone bad!!!
It's a 73sx701y22-dc23 tube.

Thanks

 

[gunblade]

pin is marked KR on the neck card

 

[bonehead]

Ok thank I will give it a go.

Cheers

 

[bonehead]

Thanks for the help.
When I ground out the red I get very little change on the screen just a slight hint if what looks like green!!!!
The other 2 are very bright when grounded.

I assume I have another faulty tube!!!!

 

[gunblade]

yep classic sanwa tube fault
these can be fixed by a tube rejuve-tony has done a few

 

[bonehead]

Ah that's handy as I have one. No idea how to use it but I know a man who can.

Thanks

 

[obcd]

How long does a tube last that has been rejuvenated like that?

All the outrun 2 tubes seem to suffer from that same illness.

 

[bonehead]

I agree as I had both tubes in my outrun 2 go with a yellow tinge.
I swopped them out.

I will have a go with the tube rejuvenator and see what happens.

Cheers

 

[gunblade]

thing is with a rejuve it could last years or just a few days-luck of the draw