hi, where can i find practical high fre spectrum analyser circuit?
thanks

"payam" wrote in message
om...
hi, where can i find practical high fre spectrum analyser circuit?
thanks

If by High Frequency you mean up to 30MHz, mine is quite practical and goes
up to about 140MHz
(http://www.hanssummers.com/electroni...ctrumanalyser/). If you
want UHF then try a google for "homebrew spectrum analyser", brings loads of
good links.

72 Hans G0UPL

"payam" wrote in message
om...
hi, where can i find practical high fre spectrum analyser circuit?
thanks

If by High Frequency you mean up to 30MHz, mine is quite practical and goes
up to about 140MHz
(http://www.hanssummers.com/electroni...ctrumanalyser/). If you
want UHF then try a google for "homebrew spectrum analyser", brings loads of
good links.

72 Hans G0UPL

In article ,
says...
hi, where can i find practical high fre spectrum analyser circuit?
thanks


The W7ZOI homebrew spectrum analyzer article is not to be missed:

http://www.qsl.net/n9zia/wireless/pdf/9808035.pdf (part 1)
http://www.qsl.net/n9zia/wireless/pdf/9809037.pdf (part 2)

You'll find this design vastly superior to the "poor man's spectrum
analyzer" projects out there that are based on CATV tuners.

-- jm

------------------------------------------------------
http://www.qsl.net/ke5fx
Note: My E-mail address has been altered to avoid spam
------------------------------------------------------

I built the 'Poor Man's Spectrum Analyzer' a whole lot of years ago. While
it does work, it leaves a lot to be desired.. The resolution isn't very
good and I would hate to make any judgments on equipment performance based
on it. I think it's an interesting project and I'll just leave it at that.

Joel AG4QC

I built the 'Poor Man's Spectrum Analyzer' a whole lot of years ago. While
it does work, it leaves a lot to be desired.. The resolution isn't very
good and I would hate to make any judgments on equipment performance based
on it. I think it's an interesting project and I'll just leave it at that.

Joel AG4QC

John Miles wrote in message ...
In article ,
says...
hi, where can i find practical high fre spectrum analyser circuit?
thanks


The W7ZOI homebrew spectrum analyzer article is not to be missed:

http://www.qsl.net/n9zia/wireless/pdf/9808035.pdf (part 1)
http://www.qsl.net/n9zia/wireless/pdf/9809037.pdf (part 2)

You'll find this design vastly superior to the "poor man's spectrum
analyzer" projects out there that are based on CATV tuners.


Here is an updated version of the W7ZOI spectrum analyzer on the same site:

http://www.qsl.net/n9zia/spec/index.html

Mario ) writes:
John Miles wrote in message ...
In article ,
says...
hi, where can i find practical high fre spectrum analyser circuit?
thanks


The W7ZOI homebrew spectrum analyzer article is not to be missed:

http://www.qsl.net/n9zia/wireless/pdf/9808035.pdf (part 1)
http://www.qsl.net/n9zia/wireless/pdf/9809037.pdf (part 2)

You'll find this design vastly superior to the "poor man's spectrum
analyzer" projects out there that are based on CATV tuners.


Here is an updated version of the W7ZOI spectrum analyzer on the same site:

http://www.qsl.net/n9zia/spec/index.html

For that matter, Wes Hayward has his own webpage, and he has some material
related to the project at:
http://users.easystreet.com/w7zoi/SA.html
According to that page, one can download the original articles from
the ARRL website, in pdf format, but doing a search over there, I don't
get a hit on the articles.

I don't see it in the 2001 Handbook (the only recent one I have), but
perhaps it's in that new Hayward book, "Experimental Methods in RF Design"
but I've yet to order my copy.

And of course, Kanga, http://www.bright.net/~kanga/kanga
has boards for the project, and they have some additional information
on their website.

Michael VE2BVW

In article ,
says...

Here is an updated version of the W7ZOI spectrum analyzer on the same site:

http://www.qsl.net/n9zia/spec/index.html


Mmm. Postscript documents. Real useful. NOT...

Sounds like an interesting variation on the project, but without
documentation in a standard, open format, his audience is going to be
limited.

-- jm

------------------------------------------------------
http://www.qsl.net/ke5fx
Note: My E-mail address has been altered to avoid spam
------------------------------------------------------

"John Miles" wrote in message
...
In article ,
says...

Here is an updated version of the W7ZOI spectrum analyzer on the same
site:

http://www.qsl.net/n9zia/spec/index.html


Mmm. Postscript documents. Real useful. NOT...

Sounds like an interesting variation on the project, but without
documentation in a standard, open format, his audience is going to be
limited.

Postscript is about as open and standard a format as you will find.
http://www.cs.wisc.edu/~ghost/ has free ghostscript viewers for most popular
platforms (windows, Linux, Mac, OS/2, VMS, etc).

- 73 Bob W7OV