-----Original Message-----
From: measures <measures@vcnet.com>
To: AMPS <amps@contesting.com>
To: <amps@contesting.com>
Date: 11 October 1999 14:04
Subject: Re: [AMPS] Hold on - SWR meter placement
>
>>
>>
>>-----Original Message-----
>>From: measures <measures@vcnet.com>
>>To: AMPS <amps@contesting.com>
To: <amps@contesting.com>
>>Date: 09 October 1999 15:35
>>Subject: Re: [AMPS] Hold on - SWR meter placement
>>
>>
>>>
>>>>
>>>>Rich,
>>>>There are several possible reasons why your measurements
>>"varied all
>>>>over the place."
>>>>
>>>>1. You have a defective SWR meter
>>>>
>>> A halfwave of 93 ohm coax was connected to a 50 ohm
>>termination. The
>>>50-ohm swr meter) was inserted at the end of the 93 ohm
>>section and the
>>>reading was 1:1. At the center of the halfwave section,
>>the swr was
>>>93/50 =1.86:1. . . The bottom-line is that when you
>>have a matched
>>>line, SWR-reading will not vary no matter where the meter
>>is inserted.
>>>However, with a mismatched line, placement of the SWR
meter
>>matters.
>>
>>If you used a SWR meter set up to work with Zo of 93ohms,
>>the reading would not change with position.
>
>Are you saying that if a 93-ohm swr meter were connected to
one of the 50
>+/- j0 ohm points it would read 1:1 -- the same as if the
meter were
>positioned at the center of the 93-ohm half-wave coax
section?
No, it would read 1.86:1, the same as it would read anywhere
along the 93 ohm coax.
I'm sorry, but I can't continue this discussion any further.
I need to concentrate heavily on something else so I'm
bowing out for a while.
Steve
--
FAQ on WWW: http://www.contesting.com/ampsfaq.html
Submissions: amps@contesting.com
Administrative requests: amps-REQUEST@contesting.com
Problems: owner-amps@contesting.com
Search: http://www.contesting.com/km9p/search.htm
|