[Elecraft] KPA1500 Drive Power

[K9MA]

Yes, turning the drive up a bit restores the output to 1500 W.

I haven't recorded it, but drive seems fairly flat band to band. (The K3, of course, saves the drive levels for each band.)

73,
Scott K9MA 

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Scott Ellington

 --- via iPad

> On May 31, 2018, at 10:16 AM, Paul Baldock <paul at paulbaldock.com> wrote:
> 
> Can you safely increase the drive to get it back to 1500W?
> 
> Another question: Is the drive requirement (amp gain) pretty flat from band to band?
> 
> - Paul  KW7Y
> 
> At 08:10 AM 5/31/2018, Bill Stravinsky via Elecraft wrote:
>> Yup, as the temp climbs the output drops some.  Even though I'm glad I got the solid state amp I still prefer tubes, hi.  The drop is anywhere between 100 to maybe 300 watts.I never really noted the exact numbers. BillK3WJV p.s. I'm thinking its a normal solid state thing.     On Wednesday, May 30, 2018, 4:23:47 PM EDT, K9MA <k9ma at sdellington.us> wrote:  I'm using the K3 with the Elecraft interface cable.  I've noticed the the CW drive power required by mine varies considerably, both with temperature and SWR.  If I set the K3 output for a KPA1500 output of 1500 W output initially, the output will drop to perhaps 1100 W when the temperature stabilizes at around 65 C.  (I've ruled out any change in antenna impedance, etc.)  A similar change occurs if the SWR goes from 1:1 to 1.2:1 when changing frequency or switching antennas.  I haven't changed the ALC from the default setting.  Has anyone else noticed this? 73, Scott K9MA -- Scott  K9MA k9ma at sdellington.us ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft   Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft at mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to k3wjv at yahoo.com ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft   Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft at mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to paul at paulbaldock.com
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