[Elecraft] KPA1500 Operation on 6 Meters

[Adrian]

I don't agree,...

Any issue between the LP-100A and KPA1500 is extremely unlikely, and any 
issue in the antenna system would reflect on both LP-100A and KPA-1500 
swr indications.

I find the LP-100A consistent readings at all drive levels discounts the 
antenna system thereafter as a cause.


On 16/6/20 10:48 am, Jack Brindle wrote:
> That means that he needs to check the connectors, adapters and cable that run from the KPA500 to the LPA-100 and potentially the LP-100A itself.
>
> The directional coupler is the last component in the KPA500 chain. For reflected power, it simply reports the conditions it sees from the antenna connector out.
> That means the connectors, adapters and cable that follow it. Especially look at any adapters, they are notorious (especially right-angle adapters) for failing at hight power.
>
> This is a problem that many have seen, and is always an issue in the antenna system. Jim’s advice is spot-on here.
>
> 73!
> Jack, W6FB
>
>
>> On Jun 15, 2020, at 4:46 PM, Adrian <vk4tux at gmail.com> wrote:
>>
>> Did you see this part in Ed's earlier post ;
>>
>> "
>>
>> An LP-100A on the output of the KPA1500 is also used and displays the correct low SWR at all drive levels that I would expect to be seeing on the KPA1500 display."
>>
>>
>>
>> This would also should any power breakdown, but it doesn't ?
>> Adrian Fewster
>>
>>
>> On 16/6/20 6:30 am, Jim Brown wrote:
>>> On 6/15/2020 6:48 AM, Ed G wrote:
>>>>    When setting the power output of my K3 to give varying amounts of drive to the KPA1500, I am seeing SWR as displayed on the KPA1500 changing by a significant amount depending on the drive level.
>>> Look for something breaking down in your antenna system or between the power amp and the antenna. High power has a way of finding weaknesses that low power lives with.
>>>
>>> 73, Jim K9YC
>>>
>>>
>>>
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>