[Yaesu] max power output

[Rob]

I have a 1000MP mk 5 I operate on AM and run it with a ~20 watt  
carrier; this is the one with the 200 w pep PA.  It handles 20 w. no  
problem 30 or 40 is pushing it.

Any time you get into any kind of key down mode, the % of peak power  
you can run is only 1/3 of it.  The other 1/3 to be considered is  
time, unless you have a PA that is so beefy (think broadcast  
transmitter) that it can run in continuous service.  Most ham store- 
bought stuff isn't there.  an exciter that could do 50 w. key down all  
day would probably have to have a PA rated at 400 w. pep, or a heck of  
a lot of fan.   That's the other 1/3 to consider, the coolnig.  For  
you, with the FT2K which not being the D is 100 w., you might get away  
with 20-25 w. for 10 minutes, beyond that and I'd start considering a  
way to blast more air through the heat sink fins.

73

Rob K5UJ


On May 25, 2009, at 7:09 PM, VA3DG wrote:

> Usually 50% of max. power for rtty, most manuals advocate this.
> I've found 20-25 watts O/P for PSK31 gets me halfway around the  
> world. That
> mode doesn't need a lot of power.
> Your finals will love you for it!!
>
> Cheers....
> Darrell,
> VA3DG/VE3DDG
>
> ----- Original Message -----
> From: "Hart" <hartva3kis at gmail.com>
> To: <yaesu at mailman.qth.net>
> Sent: Monday, May 25, 2009 12:00 PM
> Subject: Re: [Yaesu] max power output
>
>
>> Does anyone know what a safe max power output would be for a ft  
>> 2000 rig
>> running say rtty/psk31 through a soundcard would be.  I don't want  
>> to fry
>> my
>> finals. Thanks
>>
>> 7 3
>> Hart Va3kis
>
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