Kok Chen wrote:

> 
> http://homepage.mac.com/chen/Technical/Tuner/T3580.jpg

> 
> I'll be glad to make the program available to anyone running Mac OS X 
> 10.4 or newer.  You can run the application to generate plots for other 

Before doing that, please consider not using JPEG for the images.  This 
sort of image is blurred by JPEG encoding and normally compresses 
poorly.  Once compressed with JPEG, it is not possible to get good 
compression by recompressing with appropriate algorithms.

PNG is probably the best commonly available algorithm for this sort of data.

JPEG is for continuous tone images with predominantly low spatial 
frequencies (people and many natural scenes).  This image is discrete 
tone with most information in high spatial frequencies.
-- 
David Woolley
Emails are not formal business letters, whatever businesses may want.
RFC1855 says there should be an address here, but, in a world of spam,
that is no longer good advice, as archive address hiding may not work.

-- 
David Woolley
"The Elecraft list is a forum for the discussion of topics related to 
Elecraft products and more general topics related ham radio"
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