I am home, sick with a cold and was just looking back over mike's thread re-acquainting myself with some of the upgrades I am in the process of doing and realized it was on the 7th of january 2003 that his thread was started.

I just want to thank him for doing it, i still have lots of things to do on it but because of this thread and this forum, i have become very engrossed with everything CRT and Marquee related :) . I find myself going over pages and pages of data sheets for op amps and resistors and many other electrical parts and have learned a lot about this hobby.

Once again, Thanks Mike !

If i wasnt lying on my couch i'd be down in my basement trying to see if the opa695 chip will work on the neck cards or one of my old Vims,or the opa694,or the bufferd opa693, or the ...........


Athanasios

I am home, sick with a cold and was just looking back over mike's thread re-acquainting myself with some of the upgrades I am in the process of doing and realized it was on the 7th of january 2003 that his thread was started.

I just want to thank him for doing it, i still have lots of things to do on it but because of this thread and this forum, i have become very engrossed with everything CRT and Marquee related :) . I find myself going over pages and pages of data sheets for op amps and resistors and many other electrical parts and have learned a lot about this hobby.

Once again, Thanks Mike !

If i wasnt lying on my couch i'd be down in my basement trying to see if the opa695 chip will work on the neck cards or one of my old Vims,or the opa694,or the bufferd opa693, or the ...........


Athanasios

Hey man...I hope you feel better soon. I know how it is...I work not only face to face with the public but also handle their cell phones (repairs). It seems I'm always sick no matter what I do to prevent it.

And I agree about Mikes contribution over the years. I was really surprised the first time I started at the beginning of the Marquee Maint thread and saw the date. And here I was, getting into the hobby Dec of 2005 and thinking it's all new technology.
I too have many things still yet to do from that thread, and have done a couple to get my feet wet. I'm more comfortable working inside my 8500 thanks in no small way to Mikes writing style. I've always had solitary hobbies so Mike's guidance in a community based hobby has been refreshing and invaluable.

Greg

I work not only face to face with the public but also handle their cell phones (repairs). It seems I'm always sick no matter what I do to prevent it.
Sounds like you need to call a Telephone Sanitizer!! :)
http://tlb.org/telsan.html

Back to possible op amps and a theory that clause_lm had way back on the the thread. He suggested using i high gain signal path at the start and then lower the gain at the neck card. Has any one tried this yet? I was thinking of this op amp in the begining on the vim; its a 1.8 gig chip at a gain of +5 wich is higer than the +2 we need it still has 565Mhz bandwidth. we would have to play with the Rf and Rl values to try to get a slightly lower gain to say +3 so we can use - gain opamp at the neck to bring it to a +2 gain.

http://focus.ti.com/lit/ds/symlink/ths3201.pdf

then we can lower it at the neck card with a lower gain chip like a bufferd chip that has a built in feedback resistors, we could just remove the existing feedback resistor on the card. like the opa693 we can use the lower gain of -1 and it will still have a 700mhz bandwitdth.

http://focus.ti.com/lit/ds/sbos285/sbos285.pdf

Just a thought.....

Athanasios