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Homebrew SINAD meter schematics required

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David Huisman

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Jan 1, 2003, 4:36:07 AM1/1/03
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Hi,

Please let me know if you know of where I can obtain a schematic to
construct a homebrew SINAD meter.

Thanks

Kind regards

David Huisman


carltons

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Jan 1, 2003, 6:11:55 AM1/1/03
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In article <bEyQ9.19579$aV5....@news-server.bigpond.net.au>, "David
Huisman" <dhui...@bigpond.net.au> wrote:


SINAD'ers (@ 1KHz tone) are available for a very low price at the hamfests
so it may be better to buy one unless your intent is to build for
educational value. Also, if you know someone with a SINAD meter, go there
and measure 12 db several times and after a while your ear will be able to
tell you when you're within a db or so of 12 db. I haven't done a 12 db
SINAD measurement in about 20 years or so, but I would be willing to bet
some money on my ear to set to within 1 db easily. Of course, your
application may determine that you need absolute readings for doing off
channel measurements, for instance. This is a horse of a different
colour.

Steve WB4CZR

Dino AL7LZ

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Jan 1, 2003, 7:28:29 AM1/1/03
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I can't recall seeing a homebrew circuit for a SINAD meter....Ramsey
electronics has an inexpensive unit. Check out:

http://www.ramseyelectronics.com/cgibin/commerce.exe?preadd=action&key=sm1

Good luck!

Dino KLØS/4

Full Name

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Jan 1, 2003, 7:28:10 PM1/1/03
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I'll dig the manual to my sinadder II out and scan it. Might take a
day. I do remember it wasen't a very complicated schematic.

Kc4qn

Full Name

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Jan 1, 2003, 10:34:14 PM1/1/03
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On Wed, 01 Jan 2003 09:36:07 GMT, "David Huisman"
<dhui...@bigpond.net.au> wrote:

I'll dig out the manual to my sinnader II and scan it. Might take a
day.

Kc4qn

Joe McElvenney

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Jan 2, 2003, 9:21:29 PM1/2/03
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Hi,

A SINAD meter is usually nothing much more than a standard
audio power meter with a switchable 1kHz notch filter at the
input.


Cheers - Joe, G3LLV

Full Name

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Jan 4, 2003, 9:51:37 AM1/4/03
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On Wed, 01 Jan 2003 09:36:07 GMT, "David Huisman"
<dhui...@bigpond.net.au> wrote:

Here you go David. Hope This Helps.
Mike KC4QN

David Huisman

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Jan 6, 2003, 7:47:48 AM1/6/03
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Mike,

Thanks for your kind effort to pass on the Sinnader details to me.
Unfortunately there were a couple of problems.

1) Would you mind emailing the files directly to me in...@orbitcoms.com as
they take up heaps of space on the newsgroup.

2) Only every 2nd file seems to open correctly.

Kind regards

David Huisman


Joe Leikhim

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Jan 6, 2003, 8:55:41 PM1/6/03
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I wonder if someone has developed a DSP/soundcard SINAD meter solution?

David Huisman wrote:

--
Joe Leikhim K4SAT
Jlei...@nettally.com

"Jazz is not dead. It just smells funny." -F.Z.


Lars Petterson

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Jan 7, 2003, 3:11:27 AM1/7/03
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In article <c3td1vgstafeeejee...@4ax.com>,


Hi Mike!

I am interested in this design also, but none of your files has reached my
news server. Is it possible for you to send them in a mail/several mails
to me? You can use the address I am using writing this.

73 de Lars, sm6rpz
--
Lars E Pettersson | Chalmers University of Technology
d8l...@dtek.chalmers.se | Gothenburg, SWEDEN

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