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Oh yes, he's quite right. However New Zealand isn't pronounced Dow Corning ;). Don Black.

Don, One of my buddies from Bris-Vegas sez it's spelled and pronounced "Dow Nundah." Is he correct? ;-) Mark

Hey thanks Mike, I never would have thought of using "burnisher" as a search term for these! I'll give them a try sometime. Until then, I believe my homemade tool has several advantages: Far less

7417 is open collector output. Did you put a pull-up resistor on each output? It won't work if you don't. Rick ====================================================================

Isn't that how it's always done (Don down-under in Australia)? ;) Don Black.

There's a possibility I'll be in Pittsburgh for a few days. I won't have much in the way of spare time, but I'd like to know if there are any electronic surplus places worth checking out. Primary

hey thanks? didn't think they were still around / mousers search thing drives me up the proverbial wall/ but do some business because they have good stock of things/ those wud be great for cleaning

I remember those well from my USAF days, a very long time ago. Mouser carries them, made by OK Industries. Search on "burnisher".

back in the old days of rotating tv tuners we used to purchase a small metal abt 3/16x1.5 inches abrasive contact cleaning strip about a s thick as a matchbook paper striking piece which also worked

Hello to all: I have successfully followed Luis's and John's plans for using a 27C256 on a memory board. I am trying to use a 27C512 on another board with all the code and am not having any luck yet.

No way to test it. Missing a connector. Pics are here. $15 plus whatever shipping costs to you. Will fit in USPS small flat rate box. Pics are here: http://www.ozindfw.net/sell/P6051/ --

I realize some of you will say this is not so good an idea, but with the proper care I have found it useful. Of course you need to make good judgment as to which switches this method will not harm. I

Measure the vertical deflection plates and tell us what you get.

Well, the main idea is to run two CRTs close together so that you can easily compare them visually. D.

I've tried removing, moving, and swapping different combinations of plugins with no effect.

Shouldn't make any difference; after all, they've been doing that in Australia and New Zealand for decades... ;-) -Dave

You could use another suitable spectrum analyzer to do this measurement. You should also be able to use a scope with an inline 50 Ohm termination and using some basic maths. Dean

On 29 Jun 2013, at 09:16 AM, "cheater00 ." <cheater00@...> wrote: As in the subject - would anything bad happen if a 7k mainframe were operated upside down for extended periods of time? Don't

Does it do that with the vertical plugins removed? Do the vertical select buttons on the mainframe have any effect? Something is wrong in the vertical, could be anywhere up to the CRT plates so you

As in the subject - would anything bad happen if a 7k mainframe were operated upside down for extended periods of time? Don't ask why :) D.