To everybode who answered: Thanks, so it was not only me not finding
the leftovers of delimiters. Still curious why they made it that way.
No reason to replace!
Dave: I am aware of the resistor wire alloys like Konstantan,
Manganin, Isabellin, Evanohm and their variants. What I didnt
understand yet is the wiring between the resistors and the decades
and so on - its just not simple silver-coated or tinned cooper wire,
it more looks like a resistive wire - big and massive, bad to solder.
Bill: Do I understand right, they use the inter-resistor wiring to for
compensation ? (Your mail worked fine)
Sounds like a "bigger but reproducable resistance than wildly drifting
cooper wire" scheme to me. I try to figure out.
The repair itself worked out very nice, the workplace 34401A in
dcv:dcv ratio mode was happy with the results.
BR
Hendrik
Hendrik,
I didn't catch that you were asking about the interconnecting wiring. That
is likely to be the same material as used to make the resistors (Manganin).
That would maintain the low tempco of the total unit, and avoid the
comparatively large resistance drifts of copper wire. Manganin is hard to
solder without a flux that can remove the surface oxide that forms on
manganin wire. Flux used for soldering stainless steel might be a good one
to try. Just be sure to clean the joints very well after using it.
The old ESI standards are very nice instruments to have. I have an old ESI
decade capacitance box built like the Dekavider and Dekapot units. It's
quite accurate; good enough to allow me to evaluate RCL-type multimeters.
Cheers,
Dave M
_______________________________________________
volt-nuts mailing list -- [email protected]
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
and follow the instructions there.
