On 9/4/2012 5:56 PM, D. Peter Maus wrote:
On 9/4/12 13:10 , Kevin Alfred Strom wrote:
Here's a 10 MB mp3 audio file I recorded with the SDR-1000 last
night of
some ESSB operators on 3630 kHz.

It's amazing what excellent sound some of these experimenters are
getting out of single sideband. For years -- decades really -- only
(highly modified to broadcast standards) AM gear was getting this
kind
of audio quality on amateur radio. But improved techniques have
really
made SSB sound better than ever!

For best results, listen on a high fidelity set of speakers or
headphones:

http://liberty.3950.net/W9AD-KU8R-K9...%20Hz%20bw.mp3




73,


Kevin, WB4AIO.


That's impressive. Frequency response is one thing. But this audio
has quite good harmonic integrity. Quite rare in SSB.

Good balance and clarity.

Nicely done.



Thanks. To get harmonic integrity on high fidelity SSB, everybody in
the group -- and your receiver -- has be within maybe four Hz of
each other. Anything more than that, if you have a good ear, and you
start to notice that it doesn't sound quite right.

The SDR-1000 is just barely passable for such use, but I am planning
to modify it to use a rubidium frequency standard -- then it should
be within a milliHertz or two of perfect accuracy. At that point,
I'll only have to worry about the other stations!

Here's a screen shot of the virtual front panel:

http://liberty.3950.net/Flex_first_LN.jpg

I added the TMC logo to the panadapter -- my favorite old-line HF
radio manufacturer.


All the best,


Kevin, WB4AIO.
--
http://nationalvanguard.org/
http://kevinalfredstrom.com/