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Thank you for all the responses :) I'll try to find a good deal on a Flule 80K-40 to add to the arsenal of rarely used tools :)

On one hand, the 454 has several Nuvistor tubes (the 454A replaced them with JFETs) which can be difficult to find replacements for and are not getting any younger. In the worse cast, JFETs can be

You don't have to apologize for anything. Everybody here is happy to help when possible.

Looking at getting either a 454 or a 475 and would appreciate any opinions as to reliability and ease of maintenance and repair for these two scopes.? The 454 is working fine and the 475 needs some

Sounds more like cold fusion (or worse)! How could chemicals resonate?

Tom & Francis, I discovered what it is - the ultra cautious in me had left a 40W light bulb in series with the isolation transformer secondary providing AC line power to the scope. It was there

Hi Steve, Then most definitely you should take a look at Jerry's 7704A. It can take any number of different plug in vertical modules including differential input types. You could use one for the

Hi Tom, Like Jerry you suggested a 475. The only issue I have with a 475 is the fact that it's a two channel scope that does not have isolated inputs, although that can be fixed with the right lead

Hi Jerry, No, not Hybrid battery work. We're developing an electro-chemical compressor for refrigeration use. We have a web site that needs redoing, but there's a bit about us on www.xergyinc.com

Just to measure HV DC, consider a Fluke 80K-6 (6 KV, 75 MOhm input impedance) or a 80K-40 (40KV, 1000 MOhm input impedance) both designed for 10 MOhm input impedance DMM's. Joe From:

I also use a 80K-40. I also sometimes use it as an oscilloscope probe for low frequency measurements. Somewhere I found a good frequency response graph for it. Neil www.gruending.net

To all interested, the images made by Pentti (downloaded from Bruce)are ver. -02. Maybe the name of the archive file can be modified accordingly? Best regards, Bogdan

except *except* I went for a Fluke 80K-40, which is 1000:1 and an input resistance of 1G-ohm. Goes to 40kV, so amply good enough for final acceleration voltages. Craig

I just have a Fluke 40K-6 6 kilovolt probe which is good for anything except the CRT acceleration voltage. It is very accurate on all of my meters *except* for my best one, an HP 3478A, because that

Aren't these voltages mostly DC? Wouldn't a good old DC HV probe do the trick as well? No CFCs. I got an old RCA HV probe, and once I replaced the shunt resistor with a home-made (filed down)

Hi, Sounds like Hybrid battery work. There are several nice 475s on ebay. Just search for tektronix 475. If you like, I have a 3 channel 7704A on ebay. See item 290839243077. It should serve well and

Hi, several things: as Tom Jobe suggested, you can do the following: with the scope disconnected from the mains, check the resistances between ground and each supply. As Tek says, use an ohmeter that

I would recommend a P6015 or P6015A. That's what I've used for decades. A P6013A would do it as well in most cases where the voltage is not above it's max rating.

There is a pdf scanned manual for the later 608E/F on the Agilent manual archive site' if that's any help...the direct url is: -

Hi, I am offering some modules and boards I no longer want. I have described them as best I know. The actual shipping cost will be added to each. At these prices, no refund or return is offered.