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Hi Walter. I could probably use the 5642's and 12AU6's for my pile of 500 series scopes. The 8136's - not sure what they're for but I'll check my manuals to see if they're used in anything I have.

Hi Mark, (I copy this to the List as think somebody else could be interested. Please, correct me if I am wrong!) Well, I don't want to earn money with this but produce something useful :-). I have

Hi Jose. The 7CT1N connector I was thinking of was a header with the three banana plugs in the back (to plug into the 7CT1N) a flat bottom (perpendicular to the back) a sloping front with room for two

Hi Mark and all the List, First, thanks a lot for the nice explanation; my unit will come with a photocopy of the user's and service manual. I hope it is of good quality... Here I can sure help :-)!.

Jose and Dick, I have a 7CT1N as well as a manual :-) so I may be able to help. In a nutshell, the 7CT1N may be used in any (vertical or timebase) slot. There is a push button on the front panel which

Hi Lynn, I have a service manual for the 7A26 and could scan any schematics part you need, if that helps. Regards, JOSE ---------------------------------------------------------------------- 73 EB5AGV

Thanks, Stan. That's sound reasoning. I thought about it early on but having never pulled or installed a Tek IC, I was reluctant to mess around with the good 7A26. Now that I've done a few, I don't

ghpicard wrote: I think the "damage" was more likely either the eq

Dear John, I think that overriding concern was preserving MCP, which even overshadowed concern for phosphor. It appears that brightness setting is significant factor in time out. I seem to remember

Recent comments about Tek matched tubes reminded me I had some stashed away, and sure enough after a look, I have these new boxed factory Tek tubes: matched pair: 6AK5 157-0063-00 individual tubes: 2

Hi Lynn, I'll be the first to admit I don't know much about troubleshooting stuff with IC's in it but here is what I would do, if it were mine, and I had the stuff that you have. It sure sounds like

Michael wrote: I don't think that is quite correct. I can't argue with the reliability or difficulty in changing them, but I think later mainframes like the 7904A had lit plugin lights. The reason the

On this topic, does anyone know how to disable the "screen saver" feature that blanks the 2467's BrightEye CRT after about 3 seconds? (exaggerating for effect, but sometimes it almost seems that

I'm ashamed to admit I have not checked that. Will do so in the A.M. Thanks. Lynn

I was initially surprised by the 40-80Kh number also. The difference I think is that in a scope the tube is not driven as often (duty factor) or as hard (especially white background applications) as a

Gaston, The EMP is a very wild beast. One of the first tests where effects were to be measured was a test named Starfish. It fired a bomb about 200 miles above Johnson Island (do not know how far on

Jose and Richard, When you start working on those 7D01, do not forget that cheap IC sockets were used in them. Reseating ICs does wanders for these plugs. I was burned by trying to find which IC is

Hello Dave, If those gas filled tubes were high voltage indicators, as Walter thinks, they would not indicate for very long. There are no serial resistors to limit current, once 'indication' takes

Don, I like single shot mode for scope standby, too. A number of times I forgot that scope was in single shot and spent some time trying to find out 'what is wrong with my scope', but I still think

Hello Lynn, How about Trigger Source Selector (or whatever is name of that mux controlled by a rotary switch) being stuck to Channel A. I think that the selector proper are two ICs that get