Yep, the signal generator/frequency counter is the most accurate,
especially ferrite stuff. The inductance is dependent on the applied
frequency.
As a matter of interest, I came across this cheap, yet pro like LC301 on
ebay. None of the scores of LC meters around, using the LM311 and a pic,
including very popular ones, make use of the Kelvin probes !:
http://www.ebay.co.uk/itm/150712238255?ssPageName=STRK:MEWAX:IT&
_trksid=p3984.m1438.l2649
Paul
On 16 November 2012 16:10, Dwayne <masterdr@yahoo.com> wrote:
> **
>
>
> Hello Gary,
>
> I think you have said it best. With a Fluke, Signal generator, and
> frequency counter, you have it made. . .tuned circuit least resistance,
> have the frequency, and use your calculator. Accurate as ever, can be
> setup on small circuit board for easily repeated use.
>
> Another thing like could work is a LR circuit. . .same idea. . .you can
> even change the resistor to values that will allow you to measure far
> beyond your signal generator.
>
> Great to hear from ya!
>
> --- On Thu, 11/15/12, Garey Barrell <k4oah@mindspring.com> wrote:
>
> From: Garey Barrell <k4oah@mindspring.com>
>
> Subject: Re: [Amateur-repairs] An accurate test meter
> To: Amateur-repairs@yahoogroups.com
> Date: Thursday, November 15, 2012, 2:19 PM
>
>
>
>
> Paul -
>
> No-one is addressing the 'real' shortcoming of ALL of these testers. I've
> used the AADE meters for
>
> years, and they are reliable and accurate. The shortcoming is that ALL of
> these units make their
>
> measurements at 100 - 200 kHz. This works great for air wound coils, but
> throw in a toroid of
>
> 'some' permeability that is frequency sensitive. These are NOT going to
> read the same at 100 kHz as
>
> they will at 25 MHz.
>
> So you are limited to either a fairly expensive piece of equipment (Rx
> meter, VNA, etc.,) -OR-
>
> simply resonating the coil with a known capacitor and using your
> calculator.
>
> 73, Garey - K4OAH
>
> Glen Allen, VA
>
> Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
>
> and TR-4/C Service Supplement CDs
>
> <www.k4oah.com>
>
> Malti wrote:
>
> > Look what I found ! If what they claim is correct, both the price and
>
> > performance from small rf coils is the ideal
>
> >
>
> >
> http://www.ebay.com/itm/LC301-SMD-nH-inductance-tester-meter-/190649692728?_trksid=p5197.m1992&_trkparms=aid%3D111000%26algo%3DREC.CURRENT%26ao%3D1%26asc%3D14%26meid%3D3450789443300401684%26pid%3D100015%26prg%3D1006%26rk%3D1%26sd%3D190649692728%26
>
> >
>
> >
>
> > Paul
>
> >
>
> > On 13 November 2012 20:37, Kent Andersen <sci@altazip.com> wrote:
>
> >
>
> >> **
>
> >>
>
> >>
>
> >> I use one of these
>
> >>
>
> >>
> http://www.ebay.com/itm/MASTECH-LCR-Meter-backlight-data-hold-diode-AC-DC-A-V-/180501175255?pt=LH_DefaultDomain_0&hash=item2a06b55bd7
>
> >> its performed quite well and for the price you cant beat it.
>
> >>
>
> >> Kent
>
> >>
>
> >>
>
> >> On 11/13/2012 4:52 AM, pauldebono@rocketmail.com wrote:
>
> >>> I am searching for a good L meter, that can measure low to very low RF
>
> >>> inductances. The various kits and models around based on a PIC and the
>
> >>> LM311, are not good enough. So are these commercial multimeter types.
>
> >>>
>
> >>> I came across the M3 or M-Cubed LCZR meter, which Monty, N5ESE, has
>
> >>> reviewed and compared with the top, industry standard, the Philips
>
> >>> PM6303 LCR Meter (now made by Fluke). Unfortunately , this meter kit
>
> >>> is no longer in production. See: http://www.n5ese.com/M3LCR_meter.htm
>
> >>>
>
> >>> However, a Metacrawler search, came up with an updated version of this
>
> >>> meter:
>
> >>> (It is in French, but their sales department have an English version
>
> >>> of the manual.)
>
> >>> http://www.mwinstruments.com/MW1008/MW1008_f.html
>
> >>>
>
> >>> Paul
>
> >>>
>
> [Non-text portions of this message have been removed]
>
>
>
[Non-text portions of this message have been removed]
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