[Elecraft] KPA500 going into standby

[Jack Brindle]

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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