John and Tom,

With the tuner on, you've essentially disconnected the TW-1 from the radio, 
so it can't tell you what the radio is seeing.  The fact that you see little 
or no difference when switching the tuner in and out means that the antenna 
is already well matched to the radio and you don't need to use the tuner.

Steve

----- Original Message ----- 
From: "John Miller" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, April 16, 2009 23:13
Subject: Re: quick question about SWR readings when using TS480 with LDG TW1


> Yeah, if you want the tw1 to give you a reading of what the radio's seeing
> you need the antenna tuner in line between it and the antenna switch, when
> you have the auto tuner in the radio, the TW1 can't be counted on for SWR
> though I use the internal tuner in the radio when I'm not running the amp
> and I still think the  TW1 is good even like that if you know where the 
> SWR
> is normally for it, that way if something's wrong you'll notice the 
> change.
> ----- Original Message ----- 
> From: "T Behler" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Thursday, April 16, 2009 11:06 PM
> Subject: quick question about SWR readings when using TS480 with LDG TW1
>
>
>> Hi, all.
>>
>> Tonight, I was testing my HF antennas to see how they fared through the
>> winter, and noticed something that I don't think is a problem, but just
>> want
>> to be sure.
>>
>> I have the TW1 connected between my home shack TS480 and my antenna 
>> switch
>> which holds three HF antennas--an 80-meter dipole, my Windom, and my
>> triband
>> beam.
>>
>> I have noticed that with this current set-up, the SWR's remain consistent
>> whether or not I use the auto-tuner in the TS480.  In other words, I get
>> the
>> same basic SWR reading whether the auto-tuner is used or not.
>>
>> I assume this is what one would expect, since the TS480 is giving me the
>> true SWR reading.
>>
>> Is this a correct assumption?
>>
>> Again, I have the TW1 connected between the rig and my antenna switch
>> containing my 3 HF antennas.
>>
>> Please help refresh this increasingly old and feeble mind!  (HI!  HI!)
>>
>> 73 from Tom Behler:  KB8TYJ
>