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 1:00 PM, Don Wilhelm <donw...@embarqmail.com> wrote:
> 
> Pete,
> 
> I would say re-tune after switching with the external antenna switch.
> If you have tuned to one antenna (on a single port), and then change the load 
> slightly (by switching to the other antenna), a re-tune is necessary.
> 
> 73,
> Don W3FPR
> 
> On 10/15/2020 3:17 PM, N4ZR 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?
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