T.C. measurements on precision resistors

[guenthert]

guenthert,

Is it possible to determine the type of metal used in the binding posts? I have wondered about those resistors and what was used to make them. Are the posts silver plated or possibly ferrous?

I know next to nothing about materials.  All I can say is that it has the colour of steel (more or less -- the white balance in the picture above is off) and isn't (strongly) ferromagnetic.

[TiN]

Annual stability 20ppm for 0.01 class tolerance, tempco determined by alpha, beta values, which provided for each standard experimentally anything else you want to know?

[MegaVolt]

Thanks a bunch.  Wished I'd be able to read Russian though.

Ask what is interesting I will translate I think it will be easier for me to type in Russian and translate into Google.

[TiN]

Phew. My initial sorting of 75 recently acquired resistors completed.
Enjoy sorted table with results at attached. I sorted them by tempco.

It took a month of runtime my instruments, to collect the data.

[babysitter]

Time to enjoy a cool drink. Broken P331 give stylish cocktail containers when you replace the resistor windings in the hermetic part with alcohol-water-mix (as integrated cooling pad) and solder two tin layers with air gap (for isolation) into the bottom.

[Andreas]

Hello,

I am missing the thermometer for the "measurement thread"

with best regards

Andreas

[thermistor-guy]

I have just read the entire thread.

Thanks to Andreas for all the hard work, and to everyone who contributed their comments. There is a wealth of information here.