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You could also upload them to TekWiki at https://w140.com . Regards, Dave Wise ________________________________ Sent: Sunday, May 5, 2024 2:56 PM To: tekscopes@groups.io <tekscopes@groups.io>;

I hope so too, I have a 575 that I want to set up as a dedicated tube tester. I’ve been watching this thread with great interest. Haven’t found a decent 576 that’s affordable yet.

It took me a very long time to find an original manual and probe for my 610B electrometer. I was thinking of starting a Keithley group but it's hard to gauge how much interest there would

Yes, I'm surprised about the lack of traffic on forums and YT about the old keithleys. I have working 2000 dmm, 236, and 610C units. I am getting into the fix with a 619. I was lucky to get a printed

It is easy to make an electroscope. Walk around store with your finger on the electrode and observe when you get charged. Wear a foil hat if you don't want to answer any questions.

Hi Benedikt, I've scanned about 10 pages of pencilled schematics and notes about the 1L5 modifications. I'm trying to make them useable and add schematic refs. I still want to do some explanations

6C10s are three 12AX7 sections in one envelope. For many applications, the 6AC10 will work fine, it's three 12AU7 sections in one envelope. Not only do the AudioPhools like them, guitar amplifier

Dennis used to sell these from his table at the Ham swaps. Hopefully he will be attending them again soon.

I have 610B; we used those to measure the triboelectric charges on toner way back when laser printers were in vogue. I am surprised to find that there is no Keithley groups.io group. DaveD KC0WJN

Gold leaf electrometer -- Jim Adney Madison, WI USA

From TekWiki: The 6M11, a pentode/dual triode, used only in the 556 -- Jim Adney Madison, WI USA

Only one I can think of offhand would be an electrostatic air cleaner. These are often set up as part of an HVAC system, for people with pollen allergy problems. And neon sign transformers. I'm sure

My understanding of the “air sanitizers” is that there are at least two types. One uses ultraviolet light. Shortwave UV (UV-C) will work to destroy bacteria and viruses in the air, but some have

Hi, I also have a few Keithley instruments : - one 480 Picoammeter, works great - One 616 digital electrometer which was "flaky" when I got it. I have since replaced the dual FET (Q301 A/B) in the

rubber wheels here, by the looks of it the carts are at least 10 years old. so no, not polyurethane and not new. anyways, does anyone know how to measure the direction of esd? some sort of

Well, we have used ionizers at work to decrease the risk of ESD, so maybe they would have the opposite effect, Renée?? ? ? ? ? ? Jim Ford? Yahoo Mail: Search, Organize, Conquer On Sat,

I wonder if the companies installed an ion generator to purify the "air" due to the covid stuff? ...just? thought..... Renée

Same here, at the close by Walmart. If I hold the handle so I touch the metal I do not get the shocks. But let a gap form and Whammo! But not always, so cart differences, humidity differences? Frank

Have also added an ebay listing here: https://www.ebay.com/itm/166746089589?var=&widget_ver=artemis&media=COPY It has images of the oscilloscope and a much more detailed description.

I think the problem comes from shopping carts with plastic tires instead of rubber. I had a small spark at a supermarket that had replaced their carts a few weeks earlier. The wheels have bright red