Hi Steven. I have several inductance meters, only one of which is
useful. This is an old wyne-kerr bridge. It is the only one that
allows measurements at the operating frequency.? I have noticed
that if RF toroids are measured at the typically 1khz, or 12khz
test frequency, they can show up to 20% error. Sometimes worse.
Regards? Alvey Street.
On 09/11/17 23:06, Steven Dick wrote:
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Folks, as there is a lot of discussion on toroid winding etc, I
would like to recommend purchasing a low cost L-C meter to
measure your actual values for your various toroids to minimize
winding adjustments,? A good inexpensive one, which can be found
on EBAY, is the LC-100A. Search EBAY for "Digital LC-100A high
precision inductance/capacitance L/C meter tester".? They go for
about $15-16.? It works quite well, but it is not mounted in a
case.? If you spend more money, I would recommend the LC-200a.
Search EBAY for "LC200A inductance inductor capacitance
capacitor L/C multimeter Meter Tester"That one costs about $30
comes mounted in a case,? I own both and they both work very
well. I have found after designing and testing many toroid-based
filters that inductance values can
stray considerably from theoretical value based on number of
turns.? Some precautions with these:
?
