John,
Yes, I see what you mean. I was thinking of it from the input to the output
side, but you're describing it from the opposite perspective.
Steve
----- Original Message -----
From: "John Miller" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, October 20, 2009 21:40
Subject: Re: Amplifiers and SWR.
> you won't know if the antenna's tuned if the tw-1 is in line after it, how
> will you know if the tuner is tuned or not unless the tw-1 is between it
> and
> the amp? The antenna has to hook to the tuner, then tw1, than amp, than
> radio other wise there's no point in having the tw-1
> ----- Original Message -----
> From: "Steve Dresser" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Tuesday, October 20, 2009 9:33 PM
> Subject: Re: Amplifiers and SWR.
>
>
>> No it doesn't. The tuner should be the last thing in line (except for
>> the
>> TW1) before the antenna. Otherwise, the tuner won't be matching the
>> antenna
>> to anything useful when the amp is turned on. That's why you don't run
>> an
>> internal auto tuner when you're running an amplifier.
>>
>> Steve
>>
>> ----- Original Message -----
>> From: "John Miller" <[log in to unmask]>
>> To: <[log in to unmask]>
>> Sent: Tuesday, October 20, 2009 17:32
>> Subject: Re: Amplifiers and SWR.
>>
>>
>>> if you have no antenna tuner, you're right, but if you have an external
>>> tuner, it needs to be between the tuner and the amp so you can tune the
>>> antenna though again, once tuned, sometimes it's fun to put it on the
>>> output
>>> of the tuner just to see what's coming out of it, but I'd leave it
>>> between
>>> the amp and tuner, which is where mine is.
>>> ----- Original Message -----
>>> From: "Steve Dresser" <[log in to unmask]>
>>> To: <[log in to unmask]>
>>> Sent: Tuesday, October 20, 2009 5:13 PM
>>> Subject: Re: Amplifiers and SWR.
>>>
>>>
>>>> Rick,
>>>>
>>>> Actually, your TW-1 should go between the output of the amplifier and
>>>> the
>>>> antenna so you can see how much power your amp is putting out. When
>>>> your
>>>> amp isn't being used, the meter will measure the output power of the
>>>> radio.
>>>>
>>>> Steve
>>>>
>>>> ----- Original Message -----
>>>> From: "Rick" <[log in to unmask]>
>>>> To: <[log in to unmask]>
>>>> Sent: Tuesday, October 20, 2009 12:46
>>>> 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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