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Yeah have a number of Keithley items (a couple 181, a couple 192, a few 197, a 228A, a 196, 150, 131, 130, 128), nothing current only working older pieces in my meter collection, and still have a 2000

Thanks to a member of this forum (John Griessen) I was able to get my scope up and running again! Big thanks, John!

It's better that way- then you can actually use/move/drive them without too much worry.

Selling my Tektronix FG501 function generator. Works with no

Yes. He certainly has some nice equipment to do that work. I wish I could do the same with my pushbuttons. I've seen the other methods but that looks the best by far. Barry - N4BUQ

[email protected]> wrote: Yeah Robin is not your average bear. He goes by "robrenz" on YouTube where he's posted a bunch of machining related videos.

I know what I'd like: to glom onto this forum and the Tekwiki with all the Keithley stuff. A weak argument to do this would point out that: 1. Tek now owns Keithley 2. The two companies have shared

Dang! If you scroll down from the bezel treatment, he used a pantograph engraver to make button text, filled with epoxy, then filed and polished to look like new gambling dice! Truly fine looking,

Google provided this: https://byjus.com/physics/gold-leaf-electroscope/ I built one in jr high school. Very easy. You can use aluminum leaf available at a sign maker. Glenn --

I was thinking he painted the frame but now I see he sanded it down, bead-blasted it, and then applied a clear-coat (Permalac). Very clean look. Thanks again, Barry - N4BUQ

Yes. That's it. Thanks, Sigur?ur. Barry - N4BUQ

Maybe you’re talking about Robin Renzetti: https://www.eevblog.com/forum/testgear/tek-7603-scope-w-7a18-amp-7b53a-timebase-restoration/ . ?ann sun., 5. maí 2024 kl. 21:25 skrifa?i n4buq via

Hey gang, I know nothing about these scopes that I inherited from a retired EE professor that recently passed. He was quite fond of them and I want to see if I can find a home for them. They

Berzerk <crayzeemf@...> added the photo album FS: 500 series ( /g/TekScopes/album?id=294904 ) --- The following photos have been uploaded to the FS: 500 series (

I remember the same sentence, just calibrated for? a higher bandwidth, which suggests less flatness, IIRC. Harvey

I found a better explanation in the Operators Manual: Option 9 Adjusts vertical circuit performance to extend sine-wave response to 250 MHz (upper -3 dB) when 7A19 is used; +15° C to +35° C. So

Tekwiki states: Option 9: Extended bandwidth (250 MHz, trades pulse response) Is that the reference you were talking about? Thanks, Barry - N4BUQ

As I recall, it was all done with a greatly relaxed transient response. Compare the overshoot specs. The hardware is the same.

How do you make one? <jspencerg@...> wrote:

Hi Harvey, That's been my belief as well. Years ago a friend and I compared our two 7704A scopes, one with opt. 9 and one without. We couldn't identify any obvious differences in circuitry. Of