Mike,


What it is announcing is what the radio is seeing.  If I have an antenna 
with a 3:1 SWR connected to the auto tuner, but the tuner is not active, 
the  radio will  announce a 3:1 SWR as it looks "through" the tuner to 
the antenna.   If I activate the tuner and bring it down to 1.0:1,  the 
radio will say that it is 1.0.

Of course the antenna hasn't changed, but the radio is happy looking at 
the flat swr it sees at the tuner, and I guess that is the whole reason 
for  the tuner in the first place.

I think input to the amp is a different issue.  Knowing what the radio 
is seeing can be important since that is what determines  when and how 
much the radio may fold back to protect itself.

I do have both a TW-1 and a Wavenode unit in line after the amp.  Belt 
and suspenders I guess.

73, Steve KW3A


On 9/8/2014 9:43 AM, Michael Ryan wrote:
> I would b careful with the TS-590's SWR announcing capability.=20
> I would suspect that it would only apply if you had an antenna directly =
> connected to 1 of its SO-239 antenna jacks.=20
> Using an external antenna tuner, you would only be getting the SWR =
> between the rig and tuner, which should be no more than 1.5/1 or flat =
> and if not, I would think there might be something wrong. Between my rig =
> and amp, my TW-1 reports an SWR of 1.3/1 and 1.0/1 between the rig and =
> tuner.=20
> The 570 reports 1.5/1 with both units. To get an accurate measure, I'd =
> use an external talking meter between the ATU and antenna and just =
> forget about the 590'S SWR announcing unless an antenna was directly =
> connected.=20
>
> 73:=20
> Mike VO1AX=20
>
>
>