[Elecraft] KPA500 on AM...

[Grant Youngman]

Yes.  You wouldn’t want to run a KPA500 at any more than around 125W carrier output.  Maybe a bit less to give you some headroom.  At 250W carrier the KPA500 would be pushed way beyond ratings on AM.

Grant NQ5T

> On Jan 23, 2020, at 7:59 PM, K9MA <k9ma at sdellington.us> wrote:
> 
> Isn't peak power for AM 4 times the average (carrier) power?
> 
> 73,
> 
> Scott K9MA
> 
> 
> On 1/23/2020 18:10, Don Wilhelm wrote:
>> John,
>> 
>> The KPA500 is rated for 500 watts PEP.
>> With AM, that is 250 watts carrier, and 250 watts of sideband energy (125 watts for each sideband).  So your "talk power" is 125 watts, compared to 500 watts SSB.
>> 
>> Note that is for 10 minutes transmit with a 5 minute receive period.  If you are "long winded" and want to exceed that 10 minutes keydown, you should reduce the power.
>> 
>> See the specifications.  If you want to exceed the specification limits, you do so at your own peril, although the KPA500 has means to protect itself.
>> 
>> 73,
>> Don W3FPR
>> 
>> 
>> On 1/19/2020 12:43 PM, Macy monkeys wrote:
>>> 
>>> One more question then I'll go back into hibernation. What is considered a safe drive level for the KPA500 when operating AM? I haven't tried it yet but I imagine the cooling fan goes into jet takeoff mode.
>>> 
>>> Thanks, John K7FD
>> ______________________________________________________________
>> 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 k9ma at sdellington.us 
> 
> 
> -- 
> 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 ghyoungman at gmail.com