#258

[@jwrtiger]

Thanks Tony for the video on the Keithley 230. When I ordered mine I didn't know there were two models and I got the Keithley 230-1 which has the same front panel but has a gray color scheme instead of the brown one. The rear panel of the 230-1 has BNC output connections with the sense wires strapped internally. The 230-1 is a special version of the 230 with the necessary connectors for compatibility with the Model 82 Simultaneous C-V Systems from Keithley. I think the 230-1 may have been manufactured much later than the 230 because the integrate circuits in my unit are around 1997. I also found that the chassis is punched to replace the BNC connectors with the four binding post but it would require drilling four holes in the back panel fan plate. So you could convert it pretty easily to just the 230 if needed. The manual shows the schematic mods that are made between the two units. I have just made coaxial cables for the 230-1 and like you I have similar results in calibration since both units are really the same. My unit has been working very well and it is a nice device, especially with the higher calibration voltages as you mentioned. I was also lucky since these units are normally under computer control and probably in a rack. Therefore, front and back panels, display, and buttons look or feel new. The front panel on both units are label 230 so there might be some confusion on what you are getting when buying one. I thought it was a newer version with an updated color scheme when I bought it. Reason I am posting is just to let other viewers know that the 230-1 might also be a good choice and that there are two versions with the same model number on the front panel. Always looking forward to your next video!

[@TonyAlbus]

Thank you John! , that is some good information about the 230-1 , also great to hear it works well!..

[@rgmoore]

I too ended up with a 230-1 but I have now converted it to bind posts and added the switch back so I can do local vs. remote sensing.

[@jwrtiger]

@@rgmoore That sounds great on your conversion. I am just to lazy ; )

[@bobwhite137]

Your love of electronics is evident - and it makes your videos such a joy to watch. Many thanks for making all of our days brighter.

[@TonyAlbus]

Thank you Bob, nice to hear, yes i have good fun with my devices :)

[@manuelcv9475]

Very good video, the test and measurement equipment 20 to 40 years ago are the best without obsolescence scheduled and functioning. I am in some Teltronix and HP chemical capacitors of better characteristics than those who are now manufactured. Greetings.

[@TonyAlbus]

Thank you Manuel, yes they made some great stuff in the past!.

[@ssalient]

That's a really neat device. I wish I could find a reasonably priced, reasonably accurate AC voltage source, up to say 200V. That's practically all I am missing to be able to home-style-calibrate all functions on some of my multimters.

[@TonyAlbus]

Thank you!, Yes totally agree, i am looking for that too

[@SoddingaboutSi]

Do love your wall of vintage test equipment Tony. The HP34401a can sample at a faster rate by pressing Blue shit then down arrow. To recover the lost digit press the > button. This reduces the Power line cycles at the expense of more noise. I'm sure you know that already but it may be interesting to others.

[@TonyAlbus]

Thank you Simon! , i did not know that, i still need to read and play more with it.

[@Stephen_Heathcote]

Excellent video Tony. I think we may have been looking at the same ebay item! Happy New Year to you by the way :)

[@TonyAlbus]

Thank you Stephen! all the best to you too!..

[@zdzisiek1979]

👍

[@TonyAlbus]

Thank you!

[@hwj1822]

Hello 😃 thanks for your video and let us look inside, which is very interesting. My question is, are you shure, the shown AD544kh is the precision vref? It seems, it is a precision opamp as a voltage divider, which regulates the vref from the precision diode or vref with the TO92 housing on the left. Greets from germany

[@TonyAlbus]

Hi, you could be correct makes sense , i am not sure.

[@rgmoore]

It appears that you had the sense wires connected during your calibration. The manual I have says to do the calibration with sense set to "local". I would have liked it if you had done the calibration in real time instead of sped up. Thanks

[@TonyAlbus]

Thank you for your feedback and for watching the video

[@narcist6145]

why do you say thank you for watching at the end ? I don't understand the reason..

[@TonyAlbus]

LOL .. was looking at your name, and i think i can not explain.

[@narcist6145]

@@TonyAlbus your videos are very nice, comparing to other speakers on KZbin who talk fast exactly like they would be some robots, you talk in a very humanly way, I created a playlist with about 20 from your videos and I listen it daily, it creates a very nice atmosphere

[@TonyAlbus]

@@narcist6145 Thank you! English is not my first language, so i am a bit slower ... i wish you happy holidays!

[@narcist6145]

@@TonyAlbuswish you make nice videos in the new year also ! I listen to the playlist even during the night..if the playlist stops suddenly during the night I restart it soon because I feel immediately that something is missing..

[@TonyAlbus]

@@narcist6145 Thank you!

[@dennisqwertyuiop]

nice device,,,your like me Iam getting new test equipment , my house is going deeper in to the ground,,I wont blow away

[@TonyAlbus]

LOL... yes :)

[@kaybhee6]

tony,, very sorry,,, nothing to do w your nice, above video,,, but pls do check out my latest vid about sky temp.... happy new year,,,, do let me know what sky temps u get

[@TonyAlbus]

Hello Kay, that is a very nice temp meter from Fluke! .. i have a cheap no-name myself :)

[@kaybhee6]

@@TonyAlbus the other one is dali