[Elecraft] KPA500...standby vs. operate

[Jack Brindle]

It all depends on where it is measured. It is switched after the measure point, so you will see a proper reading in both STBY and OPER.
It is not applied to the PA in STBY, though.

73!
Jack, W6fB


> On Oct 27, 2019, at 1:32 PM, Mike Maloney <ac5p at sbcglobal.net> wrote:
> 
> My kpa shows HV 76 both in standby AND operate.  Drops to 61V, key down, 500W output.  AC line input drops from 124 to 122V at same time.  
> Mike AC5P
>    On Sunday, October 27, 2019, 03:19:39 PM CDT, Wes <wes_n7ws at triconet.org> wrote:  
> 
> You are putting it into standby two places.  Don't you mean "operate" for the 
> second list of things?
> 
> I have a K-Pod button dedicated to turning VOX on and off.
> 
> Wes  N7WS
> 
> On 10/27/2019 11:54 AM, Jack Brindle via Elecraft wrote:
>> The specific answer to your question isn’t in the hardware, but rather the firmware. With that in mind,
>> going to STBY does the following:
>> 1) Bypasses the TR switch, so that the signal path goes direct between the input and output RF ports.
>> 2) Turns off the 60V power to lessen the load.
>> 3) It also does some housekeeping things like turn on and off LEDs.
>> 
>> Going into standby adds a few things to the obvious:
>> 1) Check that the 270V bias power is valid,
>> 2) Enables the TR switch (removing the signal bypass)
>> 3) Enables 60V power.
>> 4) Again, some housekeeping chores are performed.
>> 
>> Now, what do I do when leaving the op position even for a few minutes? I always put the KPA in STBY mode. It just seems safer that way.
>> But, I don’t really see much issue with leaving it in OPER mode.
>> 
>> I also have a habit of disabling K3 VOX when I get up. Again, safer.
>> 
>> 73!
>> Jack, W6FB
>> 
>> 
> 
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