[Elecraft] KPA500 going into standby

[Milverton M. Swire via Elecraft]

Ooops! My bad.
My calculation was at 12v DC. My mind went on vacation.
My humble Apology. 
((((73)))) Milverton. 



     From: Ross Primrose <n4rp at n4rp.com>
 To: tnnyswy at yahoo.com; Jack Brindle <jackbrindle at me.com> OOoop
Cc: "elecraft at mailman.qth.net" <elecraft at mailman.qth.net> 
 Sent: Monday, April 27, 2015 4:46 PM
 Subject: Re: [Elecraft] KPA500 going into standby
   
Last I checked, 10A at 120V was 1200W....

73, Ross N4RP

On 4/27/2015 5:41 PM, Milverton M. Swire via Elecraft wrote:
> 400 WATTS Divided by 10 Amps input current?!!!!
> The maths doesn't compute.
>
> ((((73)))) Milverton.
>
>        From: Jack Brindle <jackbrindle at me.com>
>  To: tnnyswy at yahoo.com
> Cc: "elecraft at mailman.qth.net" <elecraft at mailman.qth.net>
>  Sent: Monday, April 27, 2015 4:26 PM
>  Subject: Re: [Elecraft] KPA500 going into standby
>    
> I think you will find that 10 amps is about right for 400 watts. The KPA has incredibly good efficiency,
> upwards of 60% or so, which supports the value.
>
> - Jack B, W6FB
>
>> On Apr 27, 2015, at 1:58 PM, Milverton M. Swire via Elecraft <elecraft at mailman.qth.net> wrote:
>>
>>>>> Current: 10 amps during tx  <<<
>> Find the reason why the Amp is only getting 10 Amps.
>> ((((73)))) Milverton / W9MMS.
>>
>>
>>        From: George via Elecraft <elecraft at mailman.qth.net>
>> To: elecraft at mailman.qth.net
>> Sent: Monday, April 27, 2015 3:41 PM
>> Subject: [Elecraft] KPA500 going into standby
>>
>> In working the FQP this weekend, my KPA500 went into Standby on its own a
>> few times when it was transmitting.  I believe it only happened when I was
>> on 10m.
>>
>> Here were the conditions:
>> Transceiver: TS480
>> Power: appx 400 watts
>> Temp: 54C
>> Current: 10 amps during tx
>>
>> HV: 61 Volts
>> VSWR: 1.4:1
>> Antenna: 10m monoband yagi
>>
>> What would be a likely cause for this?
>>
>> 73, George, K5KG
>>
>> George  Wagner, K5KG
>> Sarasota, FL  34242
>> 941-400-1960
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>
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-- 
FCC Section 97.313(a) “At all times, an amateur station must use the minimum transmitter power necessary to carry out the desired communications.”