[1000mp] PSK31 on Mark V

[1000mp@mailman.qth.net]

In a message dated 6/2/2002 4:04:22 PM Eastern Daylight Time, 
jvilardo@direcpc.com writes:


> Jim
> 
> Yes Class A operation will help but more important is to reduce the drive
> level ( mic gain AND rf-pwr to levels that produce ZERO ALC.  Not even a
> flicker.  If you have a watt meter when you have everything adjusrted right
> you will only produce some where around 15 to 20 watts.  Ask the station to
> give you a reading of your IMD it should be -20 or lower and he should see
> no sidebands on your signal, just a nice pair of railroad tracks.  (one set
> please).
> 
> Have fun PSK31 is a fun mode and requires only qrp levels of power BTW the
> ft817 is great on PSK !!
> 

Jim,

I have used PSK31 with the Mark-V many times.  I leave my RF Gain fully
clockwise, but limit my audio drive to obtain as much as 70 watts in the
psk31 mode.  Never had a problem with IMD's.  I can't believe all the hams
out there who have 100 watt rigs, and ONLY set there RF Output Power to
no more than 20 watts!  No wonder why they hear me so well... and I have
problems hearing them!  Of course if you have the RF Gain fully clockwise, 
and
limit your audio drive so that the output power is 70 watts... there is no 
way the
ALC should be deflecting.

I also use the PS31-U DATA mode, with my SCS PTC-II unit set as follows:

MARk = 1100Hz
SPACE = 900Hz

I then use the DSP DATA Filter in the Mark-V (880Hz to 1120Hz), and also the
250Hz Bandpass Filters



John
N2KBE


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