Dear Dr
I'm sure I heard of a filter that peaked the audio passband to enhance the
s, c, ch etc but cannot remember where, perhaps it was in HR. Yes, I am
interested and if we can reduce that s+n/n ratio we can get more out of our
QRP, particularly in noisy conditions. I'm not hopeful, though, if it has
been done, I would have thought the radio amateur fraternity would have
picked it up years ago. Something tells me it is a small peak around
1500Hz.
David
G3UNA
----- Original Message -----
From: "James Duffey" <[EMAIL PROTECTED]>
To: <[email protected]>
Cc: <[EMAIL PROTECTED]>; "James Duffey" <[EMAIL PROTECTED]>
Sent: Wednesday, December 27, 2006 1:25 AM
Subject: [Elecraft] QRP and getting above the noise
SSB signals need at least 10 dB and preferably 15 dB to 20 dB to be
copied.
Also a
number of years ago Ham Radio Magazine had details on a voice enhancing
frequency compensating network developed by NASA but I don't recall the
details or issue in which it appeared. I can look my Ham radios to find it
if you are interested though. - Dr. Megacycle KK6MC/5
--
James Duffey KK6MC/5
Cedar Crest NM 87008
DM65
_______________________________________________
Elecraft mailing list
Post to: [email protected]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com
