that's probably so, but I know on the ts2000, and the ts570 both, the 
internal tuner is active  on receive as a default, but you can turn the 
tuner off for receive if you wish via a menu option.
I prefer to leave the tuner inline on receive as it likely helps to increase 
receive when the antenna is tuned via the internal tuner.

73
Colin, V A6BKX
----- Original Message ----- 
From: "Gerry Leary" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Saturday, July 21, 2012 12:20 AM
Subject: Re: External tuner vs internal tuner?


> Most of the internal tuners are in the transmit only.
> ----- Original Message ----- 
> From: "Colleen Roth" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Friday, July 20, 2012 12:40 PM
> Subject: Re: External tuner vs internal tuner?
>
>
>> Hi,
>> We went to an External Tuner because we could get a better match.
>> Our receive also improved.
>> We have an Icom706. I do not remember which one. I think it is the last
>> way they made.
>> Colleen, N8TNV;
>>
>>
>>
>> ----- Original Message -----
>> From: Steve <[log in to unmask]>
>> To:  [log in to unmask]
>> Date: Friday, Jul 20, 2012 02:02:42 PM
>> Subject: Re: External tuner vs internal tuner?
>>
>>>
>>>
>>> Jim,
>>>
>>> Typically, the internal tuner won't match much more than a 3:1 or maybe
>>> at
>>> the outside 6:1 SWR, the older internal tuners on the TS-850 would match
>>> 10:1.  Now, some of that might depend on your reactances, but since they
>>> have small caps, they don't have the capabilities of external tuners.
>>>
>>> Then, let's say you have a couple different scenarios.  First, let's say
>>> you
>>> want to be real efficient and feed your wire antenna with open-wire. 
>>> You
>>> could try running it through a balun, but it would probably be easier to
>>> have an external tuner with the balanced feed point on it.
>>>
>>> The second scenario: you want to run a linear amp.  You'll then
>>> definitely
>>> need an external tuner.
>>>
>>>
>>> ----- Original Message ----- 
>>> From: Jim Gammon
>>> To: [log in to unmask]
>>> Sent: Thursday, July 19, 2012 1:10 PM
>>> Subject: External tuner vs internal tuner?
>>>
>>>
>>> Steve, what advantage is there to using an external auto tuner
>>> over the internal tuner in the TS-480? I have the 100 w model and
>>> really think it's a great rig.  That question about the tuner has
>>> nagged at me though.  I have been wondering if it would be
>>> worthwhile to get something like an MFJ external tuner, or is
>>> that simply redundant because of the existing internal one.  I
>>> have occasionally used the rig running low power when I had
>>> terrible SWR and still worked stations.  Jim WA6EKS
>>
>>