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I just got a nicely refurbished 485 which lists "opt4" under the SN. I could find no information despite several searches. I was surprised at how little information there was at the w140.com/Tekwiki.

I'd say that could be likely.? I bought a 2440 at a flea market for more, and it was stone dead when I got it home.? With the help of people on this list, I got it running.? The archives should

I think I'm going to pass it up. I need to start being selective on my scope choices. I think my next scope will be one I really want. Which is a 2467 or 7104 with a MCP CRT.

Just remembered something - there is also a safety circuit designed to stop powering up in the case of short for any of DC voltages rails - so theoretically if there is a short at some other board the

Personally I would offer less - in addition to power supply caps and possible damage to the traces under the caps there is a possibility that the NVRAMs will have to be changed ( dead batteries ) .

Gentlemen, The vast majority of comments on this topic are completely lacking any relevance to the TekScopes. Please stop wasting our bandwidth. Thank you, Dennis Tillman W7PF

I'm looking at a 2440 that won't power on for $85. Worth it or not? What is the likelihood of just power supply issues and no IC problems? Thanks fellas

I had a boss who made that necessary. I go in the office, tell him what a job needs, we got it, callem am tell me if I should do it. He gets on the phone and I hear "OK, we'll be there with it around

Everyone knows that Scotty always pads the estimated time by a factor of 3.5 to 1. The Outer Limits episode with the monkey working in something was on Comet TV last night, at midnight. Michael A.

Well, yeah- but if he had ever failed to get the engines working again at one of those critical junctures... -Dave To: [email protected] Sent: Wednesday, July 18, 2018 11:08 PM Subject: Re:

Except Scotty.

Pete, The keycap has two little tabs that snap over the momentary switch. I will send a photo if you have not resolved this yet. Removing the keycap requires access to the button board because the

Or anyone who had a red shirt- that was the kiss of death! -Dave ?new character on Star Trek, but not Uhura, you are dead within the hour. At least it seemed so.

Couple of questions and a comment. One, why can't I get the print at w140 ? I went to that Polish site and got it and it is scanned terribly and there are tings missing. Then I went to BAMA and it

Something lost with youth. They were better when young and can really get scared. Later they lose some of their bite, or more aptly we lose the ability to feel it. It's almost impossible for a show to

That is fine where it is possible. Alas there are places where it is difficult to make such a replacement. Just for example -- there are some high capacitance (something like 1,000uF 25V) wet

It has only happened in 20% of my 1502s. I seem to have a fetish for the damn things :) ISTR the 25V rails are not low current, which might increase the stress.

Interesting - must check mine. Wonder why they used them only on the +25V rail, which is only used on the high voltage board, to feed the switching transistors on the primary of the HV transformer,

forever Well, yes. All I'm saying is that I have identical plugins (such as 7A26) in which at some point Tek went from tant bead to aluminium electrolytic. So substitution is tried and tested. And low

The only thing that can degrade a rubber-sealed wet tantalum, and also (particularly) axial electrolytics, is the flux cleaning regime. As an example I bought a NOS P6046 differential probe, and