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
>>>
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