Thursday, 15 November 2012

Re: [Amateur-repairs] An accurate test meter

 

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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Re: [Amateur-repairs] An accurate test meter

 

I have one of those and it is very accurate!

73,
Gordon
N6WK

On 11/14/2012 1:32 AM, 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
> <mailto:sci%40altazip.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
> <mailto:pauldebono%40rocketmail.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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Re: [Amateur-repairs] An accurate test meter

 


----- Original Message -----
From: "Geoff Blake" <geoff@palaemon.co.uk>
To: <Amateur-repairs@yahoogroups.com>
Sent: Tuesday, November 13, 2012 11:42 AM
Subject: Re: [Amateur-repairs] An accurate test meter

> An antique but good device for measuring inductance (there
> is a
> capacitance measuring version too) was the Rhode and
> Schwarz LARU - a
> later version was the LART. I am not sure if there is a
> more modern
> version.....
>
> It works on the basis of a capacitor connected to the
> unknown and a
> device to check the self resonant frequency - it is rather
> like an
> accurate GDO. Obviously the capacitance version works by
> checking with
> a known inductor......
>
> I would imagine that a similar device should be easy to
> make...
>
> Geoff G8GNZ
>
If we are discussing small inductors or capacitors for
use at RF a Q-Meter is an ideal tool. Very small
capacitances can be measured by the substitution method. In
theory its also possible to measure equivalent series
resistance but usually the Q of small capacitors is so much
larger than the Q of the working coil that its masked.
My ancient Booonton 260-A will measure less than 1pf.

--
Richard Knoppow
Los Angeles
WB6KBL
dickburk@ix.netcom.com

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Wednesday, 14 November 2012

Re: [Amateur-repairs] An accurate test meter

 

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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Tuesday, 13 November 2012

Re: [Amateur-repairs] An accurate test meter

 

The specs don't show whether the reading is series or parallel, the test frequency, and what effects Q might have on results.

Bob

--- On Tue, 11/13/12, Kent Andersen <sci@altazip.com> wrote:

From: Kent Andersen <sci@altazip.com>
Subject: Re: [Amateur-repairs] An accurate test meter
To: Amateur-repairs@yahoogroups.com
Date: Tuesday, November 13, 2012, 11:37 AM

 

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

[Non-text portions of this message have been removed]

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Posted by at No comments:

Re: [Amateur-repairs] An accurate test meter

 

An antique but good device for measuring inductance (there is a
capacitance measuring version too) was the Rhode and Schwarz LARU - a
later version was the LART. I am not sure if there is a more modern
version.....

It works on the basis of a capacitor connected to the unknown and a
device to check the self resonant frequency - it is rather like an
accurate GDO. Obviously the capacitance version works by checking with
a known inductor......

I would imagine that a similar device should be easy to make...

Geoff G8GNZ

On 13 November 2012 11:52, pauldebono@rocketmail.com <pawlud@gmail.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
>
>
>
>
> ------------------------------------
>
> TO UNSUBSCRIBE: login to groups.yahoo.com, select group amateur-repairs, click on "leave group" on right side of screen and follow instructions. PLEASE do not send UNSUBSCRIBE messages to the list.Yahoo! Groups Links
>
>
>

--
#################################################
Geoff Blake, G8GNZ JO01fq: Chelmsford, Essex, UK
<geoff@palaemon.co.uk> or <melecerties@gmail.com>
Using Linux: Ubuntu 11.04 on Intel or Debian on UltraSparc
and Apple OS X 10.8.2 Mountain Lion on my Macbook Pro.
Avoiding Micro$oft like the plague.
#################################################

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Re: [Amateur-repairs] An accurate test meter

 

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]

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