Totally awesome videos. Your approach to showing/teaching various electronics equipment and components are the best on UA-cam, Thanks for your hard work,
Yes they really are a work of art. Things are not built like that these days. I may do some more videos in the future on some different units. Thanks for watching and thanks for the sub.
I have two GenRad decade boxes on my bench, similar to the Cropico unit you have. I live in Canada so British test gear is rare here. I wonder if your (very old) resistance lab standards were purposely built a few tenths of an ohm low to account for (older) test lead resistance? Great video, thanks!
General Radio is very good stuff. The resistance standards are built to be as close to their marked value as possible. With these it's not so much about being exactly bang on the value but much more about knowing what value they are to a high degree and that they are extremely stable and really won't change over many many (decades, lol) of years. The multimeter used was not accurate enough to get accurate readings from these devices but this video was mainly about showing the beautiful construction of these units inside. A method called a 4 wire Kelvin connection is needed to eliminate test lead resistance. You can look that up on Wikipedia to see what that means. I will do another video in the future with more accurate meters and we'll measure them again. Thanks for watching.
Yeah, i expect the decade boxes and the resistance standards are better than the meter. 10:41 i was expecting the 100 ohm standard to 100.00 ohms exactly. It reads 0.13 ohms low but i expect its the meter. You really should have been using a meter with 4 wire resistance measurement for the best accuracy.
This video was mainly about showing the insides and the beautiful construction. I do have both a Solartron 7150 and a Datron 1065A, but they need some work doing on them first. Then I will repeat the tests with proper 4 wire Kelvin connections. Thanks for watching and thanks for the sub.
Totally awesome videos. Your approach to showing/teaching various electronics equipment and components are the best on UA-cam, Thanks for your hard work,
Wonderful to see these older machines; how they're constructed and how they measured. The construction is beautiful.
Yes they really are a work of art. Things are not built like that these days. I may do some more videos in the future on some different units. Thanks for watching and thanks for the sub.
Loved it, thank you, great to see some of the old decades :)
Thank you. I might do some more different units in a future video. Thanks for watching and thanks for the sub.
I love those switches, thanks for another video!
I may do another video in the future on some more of these types of things. Thanks for watching, as usual.
You were right. the Db device on my iPhone is Very inaccurate. By over 30 Db. Great video today, Thank you for all your hard work :-)
Thank you and thanks for watching.
those things are kinda glorious, actually
Yes they are beautifully made devices with great craftmanship. Thanks for watching.
I have two GenRad decade boxes on my bench, similar to the Cropico unit you have. I live in Canada so British test gear is rare here.
I wonder if your (very old) resistance lab standards were purposely built a few tenths of an ohm low to account for (older) test lead resistance?
Great video, thanks!
General Radio is very good stuff. The resistance standards are built to be as close to their marked value as possible. With these it's not so much about being exactly bang on the value but much more about knowing what value they are to a high degree and that they are extremely stable and really won't change over many many (decades, lol) of years.
The multimeter used was not accurate enough to get accurate readings from these devices but this video was mainly about showing the beautiful construction of these units inside.
A method called a 4 wire Kelvin connection is needed to eliminate test lead resistance. You can look that up on Wikipedia to see what that means.
I will do another video in the future with more accurate meters and we'll measure them again. Thanks for watching.
Yeah, i expect the decade boxes and the resistance standards are better than the meter. 10:41 i was expecting the 100 ohm standard to 100.00 ohms exactly. It reads 0.13 ohms low but i expect its the meter. You really should have been using a meter with 4 wire resistance measurement for the best accuracy.
This video was mainly about showing the insides and the beautiful construction. I do have both a Solartron 7150 and a Datron 1065A, but they need some work doing on them first. Then I will repeat the tests with proper 4 wire Kelvin connections. Thanks for watching and thanks for the sub.