Thanks Jim,
Yes, I've miss typed. Sorry if I confused anyone. Those of you that have
one of those little handy elecraft generators I'm sure understood. Output
is either 1uV or 50uV....there I typed it right!
Anyway, I'm gonna study up on the 2nd if-audio board and see if I can figure
out anything.
Later,
David
----- Original Message -----
From: "Jim Shorney" <jshor...@inebraska.com>
To: <drakelist@zerobeat.net>
Sent: Thursday, February 19, 2009 5:11 PM
Subject: Re: [Drakelist] TR-7 S meter issue
On Thu, 19 Feb 2009 10:45:37 -0500, David & Chris Drake wrote:
I've gone over the S-meter setup 3 times, and same result. An S-9 signal
is 30 over, calibrate is about the same, 30 over. I've tried a separate
signal generator at 50mv and its 30+ over (elecraft oscillator). Same
50mv signal gen used to check TR4C and its S-8, and TTec Omni VI is same.
I really hope you mean 50 uV, rather than 50 mV. The holy grail seems
to be 50 uV for S-9 these days, although I have seen some radios over
the years that were spec'd at 100 uV. The results I ended up with
seemed to be a combination of circuit changes to the 2nd IF/Audio board
and the adjustment method used. I've got my notes partly cleaned up,
I'll see if I can finish it up this evening and get it up on the web. I
got closer to 50 uV for S-9 than I could when I started...
73
-Jim
--
Ham Radio NU0C
TR7/RV7/R7A/L7, TR6/RV6, T4XC/R4C/L4B, NCL2000, SB104A, R390A,
GT550A/RV550A, HyGain 3750, IBM PS/2 - all vintage, all the time!
HyGain 3750 User's Group - http://groups.yahoo.com/group/HyGain_3750/
http://radiojim.exofire.net
http://incolor.inetnebr.com/jshorney
http://www.nebraskaghosts.org
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