There is one in that amp I'm pretty sure, I know the SB-200 has a matching 
network so I'd think the 220 would as well. You sometimes see a little swr 
change with power but there's no way it should be as drastic as he's seeing.
----- Original Message ----- 
From: "Steve Dresser" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, October 20, 2009 5:09 PM
Subject: Re: Amplifiers and SWR.


> Rick,
>
> You may have some sort of matching network on the input side of your
> amplifier, and if it has changed, you should probably adjust it.  I 
> wouldn't
> try to correct this with the auto tuner in your radio.
>
> Steve
>
> ----- Original Message ----- 
> From: "Rick" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Tuesday, October 20, 2009 12:24
> Subject: Amplifiers and SWR.
>
>
>> Hi list.
>> Using my TW-1 and MFJ versa tuner, I set my SWR as low as I can get it.
>> Say 1.01 to 1 on 20 meters. Then I tune the amp.
>> After tuning the amp I check my SWR again, and it's up to say 2.4 to 1.
>> Is this normal, and should I readjust the SWR again with the amp on?
>> Thanks in advance, and 7 3.
>>