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).
Sounds plausible.
That would maintain the low tempco of the total unit, and avoid the
comparatively large resistance drifts of copper wire.
As I wrote in my "If I understand right" message."
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.
Fortunately the previous owner kept the material when he modified 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.
Besides that Dekavider which was part of a power supply i have a also
recently ebayed SR1010 that was the cheapest to get and needed some TLC
but the 34401A at work is not really a good instrument to check it, and
i have my "noble thing" a Dekavider RV722 which I use quite frequently
for ratio measurements, simply considering it ok for me as i was not yet
able to show any problems with it (HP3456A and 34401A in ratio mode are
both happy.)
Cheers,
Dave M
Cheers
Hendrik
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