These Data were submitted on: Tuesday, April 20, 2004 at 12:18:01


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NAME:  Joe Taylor

CALL:  K1JT

E-mail:  k1jt@@tarrl.net  ( Remove 1 "@" )

URL:  pulsar.princeton.edu/~joe/K1JT

CPU::  P4

CPU Speed::  2.7 GHz

RAM in MB::  256

SOUND CARD::  Delta 44

SOUND DRIVER::  OSS

ADDITIONAL CARD1::  integrated AC97 (IntelPCI)

VIDEO CARD::  integrated on Intel motherboard

LINUX DISTRIBUTION::  Red Hat

LINUX VERSION::  9

KERNEL VERSION::  2..4.20

GCC VERSION::  3.2.2

SVGALIB VERSION::  1.4.3

LINRAD VERSION::  01-17

TEXT:  Linrad is now running well at SSB radio bandwidth, single polarization.  Now on 
       to XPol antennas and wider bandwidths!


As per 5/5 2004, Joe added the following:


  "I have Linrad  running for just three weeks, and my present setup is
   simple.  I use only one polarization channel and process the audio
   output from my TS2000 transceiver.  In its widest SSB filter setting,
   the TS2000 provides a bandwidth of about 5 kHz.  Of course, Linrad
   handles the computational burden very easily: the CPU load on my 2.7 GHz
   Pentium 4 is usually between 1% and 10%, depending on the exact
   parameters selected.
 
   Although my receiving system is minimal for Linrad and I have much to
   learn in using the program, I have now made several 144 MHz EME CW QSOs
   using it.  My station is really a "tropo" station, not an EME station.
   I run about 700 W to 4 x 9el yagis aimed at the horizon, with no
   elevation control.
  
   I can already say that Linrad provides the following advantages:
 
   1. Excellent waterfall display for locating the desired signal and
      discriminating against birdies;
 
   2. Very easy single-mouse-click tuning;
 
   3. Smoothly and continuously adjustable filter bandwidths and shapes;
 
   4. Automatic frequency control that keeps a CW signal centered in the
      bandpass, compensating for changing Doppler and oscillator drifts.
 
   I have not yet gained much experience with the noise-blanking
   capabilities of Linrad, so I cannot comment usefully on this feature. I
   believe I will need larger bandwidth before its main benefits can be
   realized.  Dual polarization is also very much on my "To Do" list.  I
   have compiled and tested the JT65 decoder under Linux, but have not yet
   tried sending Linrad output into it.
 
   In the meantime, I am writing to encourage others to get on the air with
   this extremely capable software radio "back end".  And when you do,
   please share your Linrad operating experiences with the rest of us!"
 
                         -- 73, Joe, K1JT


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