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Hair on the wheels and some plastic of the wheels rubbing together generate lots of ES charge. Sort of like a van de graaff generator.

OK, so looking into it, a gold leaf electroscope will detect the
presence of _a charge_, but what i want is to figure out the _sign_ of
the current when an item is discharging into another item. I don't
think a gold leaf electroscope will do that, but i might be wrong. let
me know.

also why buy aluminium leaf? why not use alu foil?

On Mon, May 6, 2024 at 5:03?PM Glenn Little via groups.io
<glennmaillist@...> wrote:

Google provided this:

I built one in jr high school.
Very easy.
You can use aluminum leaf available at a sign maker.

Glenn

On 5/5/2024 9:56 PM, cheater cheater wrote:

How do you make one?

On Mon, May 6, 2024 at 12:41?AM jspencerg via groups.io
<jspencerg@...> wrote:

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.

--
-----------------------------------------------------------------------
Glenn Little ARRL Technical Specialist QCWA LM 28417
Amateur Callsign: WB4UIVwb4uiv@... AMSAT LM 2178
QTH: Goose Creek, SC USA (EM92xx) USSVI, FRA, NRA-LM ARRL TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"

Hi,
I'm looking for a Keithley 2000 motherboard.
Mine has some broken PCB tracks but I can't fix it.
The PCB is multilayer.
Thanks if anyone can help me.
Mauirzio

Is anyone looking for a 575? I have two spares and need the room. PM if interested. I am in Kentucky.
ThanksJeff Kruth

Hi,
I'm looking for a Keithley 2000 motherboard.
Mine has some broken PCB tracks but I can't fix it.
Thanks if anyone can help me.
Mauirzio

Bob Koller <fourdesigns@...> added folder */TG2000 SOFTWARE*

*Description:*
TG2000 SOFTWARE



---

The following files and folders have been uploaded to the Files area of the [email protected] group.

* /TG2000_SW.zip ( /g/TekScopes/files/TG2000_SW.zip )

*By:* Bob Koller <fourdesigns@...>

*Description:*
TG2000 SOFTWARE

I just uploaded the SW, check the files section.

Enjoy!

Hi all, I can aquire a second hand TG2000 ( Video Signal generator platform ) for 50 euro but the device was for a very longtime in storage and so the NVRAM backup battery is dead and all the signal patterns need to be reloaded to NVRAM from PC. For this one needs a PC software called SDP2000 , which the seller does not have . Does anyone have a link for dowload of the software ? Thanks in advance. Greets. Johan

John,
I have some single slot, one three slot, and a bunch of four slot TM500
frames.
I also have a bunch of 500 series plugs - sold a few recently and got some
left over ones. Let me know what you may be looking for.
Interestingly, I also have a very affordable FG501 that is listed for sale
and still available.
Let me know if you're interested in any of the above - can be offline.
Radu.

On Mon, May 6, 2024 at 7:27?PM John Hancock via groups.io <nerdful1=
[email protected]> wrote:

I bought it. I miss the tm500 rack stuff. Hope I can buy something to put
it in. Looking for a defective rack unit I can repair.
Or a perfect one if possible.

John

I bought it. I miss the tm500 rack stuff. Hope I can buy something to put it in. Looking for a defective rack unit I can repair.
Or a perfect one if possible.

John

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 that I havent fully refurbished. Have been looking for a 263 for a while.

Also a little surprised that there isnt a Keithey specific forum.

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 issues.

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

On Mon, May 6, 2024 at 11:19?AM John Griessen via groups.io <john=
[email protected]> wrote:

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!

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 kin since 1990 with the DM5120 having some Keithley 196 innards.
:-)
Reading a Keithley manual is so much like reading a Tektronix manual. Both having high quality and same organization.

On 5/6/24 07:33, n4buq wrote:

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.

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, but I think I'll just look.

My scopes don't get quite that perfect... but then, my old sports car is not restored to concours near perfection either...

Google provided this:

I built one in jr high school.
Very easy.
You can use aluminum leaf available at a sign maker.

Glenn

--
-----------------------------------------------------------------------
Glenn Little ARRL Technical Specialist QCWA LM 28417
Amateur Callsign: WB4UIVwb4uiv@... AMSAT LM 2178
QTH: Goose Creek, SC USA (EM92xx) USSVI, FRA, NRA-LM ARRL TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"

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