that's true, but I do know a couple people who it still makes a minor 
difference and that's our only explanation.
----- Original Message ----- 
From: "Colin McDonald" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, November 15, 2006 3:02 PM
Subject: Re: TW1 Inconsistancy


> most modern rigs do not depend upon full output to insure a 50 ohm load
> though.
> I think the meter has a 5 per cent stated window of error.
> This would include SWR readings as well as power readings.
> 73
> Colin, V A6BKX
> ----- Original Message ----- 
> From: "John Miller" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Wednesday, November 15, 2006 6:49 AM
> Subject: Re: TW1 Inconsistancy
>
>
>> Not to mention, if the reading at first is with the SWR off and the
> radio's
>> cutting back, you hit the tuner and get the radio up to the 100 watt out
> put
>> again because it's seeing a load it likes, that can vary the readings a
>> little too.
>> ----- Original Message ----- 
>> From: "Butch Bussen" <[log in to unmask]>
>> To: <[log in to unmask]>
>> Sent: Wednesday, November 15, 2006 6:07 AM
>> Subject: Re: TW1 Inconsistancy
>>
>>
>> > Actually, the internal tuner can effect the readeings.  If you want an
>> > accurate reading, be sure the tuner is off.  The tuner makes the radio
> see
>> > 50 ohms, but the impedence of the line and load on the output, the
>> > antenna, and the load back toward the radio, the tuner, can be far from
> 50
>> > ohms.  The meter is designed to run in a 50 ohm circuit, which it isn't
>> > any more.  I fought this battle a while back trying to tune up a six
> meter
>> > antenna on the 2000, and got all kinds of strange readings until I
>> > remembered to turn off the tuner.  The tuner does effect things, 
>> > because
>> > it can present a high impedence to the meter on that end.  Also, you'll
>> > find that sometimes just changing the length of the cable between the
> rig
>> > and the meter can change readings.  I had a regincy 2 meter rig once 
>> > and
> I
>> > was just a beginner in all this stuff.  I had run another radio on my 2
>> > meter beam and knew the beam was working great.  The regincy worked
> great
>> > on my mobile, but when I hooked it up to the beam, no output.  As they
>> > came from regincy, they were very sensative to a "high s w r", and 
>> > would
>> > shut down.  I thought o.k., I'll check the swr.  Put the meter in the
>> > line, and radio worked fine.  Took the meter out, and no output.  I
>> > finally found that by either adding 6 inches or cutting six inches off
> of
>> > the line made the thing work.  It was dependant on exactly where in 
>> > this
>> > run of 70 feet of coax the radio was.
>> > This is why if you are checking the s w r on a 72 ohm line, you have to
>> > change some resisters in the meter so it matches the line.
>> > 73s
>> > Butch Bussen
>> > wa0vjr
>> >
>>
>