[Elecraft] Metal Oxide Power Resistors Inductive?

Stuart Rohre rohre at arlut.utexas.edu
Tue Jun 22 17:30:15 EDT 2004


Trev,
Way back in 1960's  I wondered the same about Corning tin oxide resistors
like these axials.

I measured many after work with HP Vector Impedance Meters, forerunners to
the MFJ et al.

The results I got showed they were good up to 108 MHz the high end of the
4815 Z meter.  I also had run them down below 500kHz with the 4800 Z meter.

It is likely these are OK, depending on how they are deposited.  If spirals
are done solenoid style there is likely some inductance, but if wound right,
it can be canceled.
72,
Stuart
K5KVH




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