[Elecraft] Antennas and Output Power - KPA-1500

[N4ZR]

I don't think so. After I've switched to the sloper, the ATU switches 
properly to the parameters for it.  The only thing that is unexpected is 
that the correct level of driving power for one antenna pushes the amp 
to 1700 watts on the other.  If the ATU also remembered the driving 
power level for each set of parameters, that would solve the problem, I 
think, but that may not be practical.

73, Pete N4ZR
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On 10/15/2020 4:35 PM, wb6rse1 at mac.com wrote:
> That's because the ATU is set for the previous antenna vs the sloper. If you've trained the ATU for both then those parameters are not the same. GL
>
>> On Oct 15, 2020, at 1:24 PM, N4ZR <n4zr at comcast.net> wrote:
>>
>> I guess I wasn't clear - when I see this overpower/fault combination, the sloper is matched around 1.2:1, it's just that output power and current draw jump up to fault levels, so a retune wouldn't help
>>
>> 73, Pete N4ZR
>> Check out the Reverse Beacon Network
>> at <http://reversebeacon.net>, now
>> spotting RTTY activity worldwide.
>> For spots, please use your favorite
>> "retail" DX cluster.
>>
>> On 10/15/2020 3:40 PM, wb6rse1 at mac.com wrote:
>>> See p.25 of the manual. Then p.30 set ATU HiSWR RETUNE to ON for 40m.
>>>
>>> GL - Steve WB6RSE
>>>
>>>> On Oct 15, 2020, at 12:17 PM, N4ZR <n4zr at comcast.net> wrote:
>>>>
>>>> I have two antennas for 40M, a Carolina Windom and a full-wave parasitic sloper, the latter fed through a 4:1 balun.  The 1500's tuner handles both antennas nicely, and I have trained it on both of them, but when I switch from the Windom to the sloper (on an external antenna switch), the output power changes from ~1400 watts to nearly 1700, often triggering a high current fault.  Any way around that?
>>>>
>>>> -- 
>>>> 73, Pete N4ZR
>>>> Check out the Reverse Beacon Network
>>>> at <http://reversebeacon.net>, now
>>>> spotting RTTY activity worldwide.
>>>> For spots, please use your favorite
>>>> "retail" DX cluster.
>>>>
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