Well, normally it's not good to run 2 tuners, but what you might want to do
is get the swr perfect on the antenna or as close as you can, put the TW-1
in between the radio and amp, making sure everything's tuned up and ready to
go first, then see if you see strange SWR there when the amp's on, I have a
feeling one of those, I think there are capacitors that go bad and do that
sometimes but I'd have to look it up on line, if the radio's seeing 1:1 or
close to it in to the amp at all times, it's something else, possibly as
simple as tuning the amp wrong. I'd check the input of that amp first and
see if something's going on there.
----- Original Message -----
From: "Rick" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, October 20, 2009 12:46 PM
Subject: Re: Amplifiers and SWR.
> Hi John.
> The TW-1 is between the amp and the tuner.
> The radio is A Kenwood TS-430S, and the amp is A Heathkit SB-220.
> I have the original manual to the amp, and according to the notes the guy
> that built it, the amp was put on the air on May 5th 1976.
> I have a Kenwood AT-250 auto tuner I can put between the radio and amp if
> you think that would help.\Thanks again for your help, and 7 3.
> ----- Original Message -----
> From: "John Miller" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Tuesday, October 20, 2009 12:32 PM
> Subject: Re: Amplifiers and SWR.
>
>
>> The amp should have no effect on swr, where is your TW1 in line? I'm
>> wondering if something's off inside the amp and maybe the input impedance
>> is
>> off, if the radio has an auto tuner, you can use that for a quick fix for
>> that, but will want to fix it right eventually. I've heard of that
>> happening
>> with older amps.
>> ----- Original Message -----
>> From: "Rick" <[log in to unmask]>
>> To: <[log in to unmask]>
>> Sent: Tuesday, October 20, 2009 12:24 PM
>> 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.
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