[Elecraft] K2/100 and PSK31

[Charles Greene]

Jim,

Will work ok, comments below,

At 07:39 AM 11/18/2004, James T. \"Jim\" Rogers wrote:
>OK gurus...... I think I am doing this right.
>
>         I have advanced requested power just about full scale

Ok, but if your peak is 40 watts, for example, I would set the power level 
control just above that point, say 45 watts, or whatever it works out to 
be.  Set the power out to what you want.  A series of !!!!! will get you 
the maximum power out that text will produce, or "tune" in MixW is supposed 
to do it with a tone.  Be advised that a single tone produces CW.  You need 
a two tone audio source to produce true peak power output.  Of course most 
of don't have one, so try the !!!! and read the power on a true peak 
reading watt meter like the Autec WM1.  Note:  Most watt meters labeled 
"peak" are not.  Whatever, but as you reduce the power knob at some point 
the ALC light will start to flicker.  At that point, increase the power 
setting some until the flickering stops.

>         I have the transmit audio gain set to about 20w out idling.

The average power is 20 watts, I assume.  That may be too high, as average 
power is supposed to be 50% peak power, depending upon on what you read it 
on.  You can go up to about a peak power of 30 watts, idle, which is an 
average power level of 15 watts, depending on what you use to read the 
power output level.  The Autec will read 30 watts when the peak power is 30 
watts.  Unfortunately, many power meters read somewhere in between, so you 
don't know what your power is.  Not that a receiving station will notice 
the difference.  The bottom line is don't let your finals get too hot.

>         I have made sure that I am just below the point where the alc 
> comes on

Ok

>         I get really nice reports
>         The fan comes on shortly after I start a QSO
>         The heat sink gets really warm!
>
>Does that sound about right? I am just wondering if I should put some
>additional air on the heat sink with a larger muffin fan I just happen to
>have.

I use a 4" external muffin fan that I put rubber feet on and placed right 
above the heat sink.  Helps.



>73, Jim W4ATK
>K2/100 #4028