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I guess this is the graph, found by Google search <http://www.ko4bb.com/Manuals/Fluke/Bandwidth_Measurement_80K40.pdf>. It's valuable to know what's really happening. Looking at the SA graph and

Hey, don't get in the way of research! ?:) Either they achieve the results they seek, or they don't. ?It should never be our place to discourage pure research, nor to blindly challenge their

Hi Alex, could you explain more on your modifications to the RCA probe for use with a DMM please. I guess you must have reduced the resistance because it originally was designed for use with VTVM with

Chemicals can resonate no worse than Power/Ground plane on a multilayer board, as claimed by famous Howard Johnson of 'Black Magic' fame. A bit off subject, but close enough to cold fusion. Miroslav

Hi Jerry, Nice looking scope, too far away for me. However, you've listed it as a 200 MHz scope in the title but only 100 MHz in the description. I guess I could look it up but which is correct? I

No, nothing as impossible or profitable as cold fusion.? We're developing an electro-chemical compressor for refrigeration use, and there is water in our cells by design. "Bound water and ice have

This post describes a procedure that I used to remove and clean the Ch1 and Ch 2 input assemblies for a Tek 475A scope.My scope was showing intermittent and erratic traces even after switching ranges

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