[1000mp] SWR Meter and FT-1000MP

Sun, 10 Mar 2002 19:36:09 -0800

Norm,

Thank you, you hit the nail on the head. So many
times we lose sight of the fact that "the
instruments generally available to us are not
laboratory instruments at all, but merely
reference gauges that provide relative information
rather than absolute readings". As such, the
information provided is valuable but does take
some interpretation which is what makes this hobby
great.

73,
John Winward, K3AOT

NORM FUSARO wrote:
> 
> The external meter is reading reflected power from the dummyload since that
> is the last thing connected to it.  The internal meter is reading  power
> reflected back from everything after it; linear, switch box, all cables &
> connectors, etc.  at low power the reflected power is so minuscule that it
> is hardly readable, however as the forward power increases so does the
> reflected power.   The difference that you are seeing is not worth bothering
> with.  The external meter has an accuracy of +/- 10%.  Both meters are not a
> scientific measuring devices but just reference gauges to be glanced at
> while operating to be sure that nothing drastic is wrong.
> 73
> Norm, W3IZ
> ----- Original Message -----
> From: "Pawel, SP7PS" <[email protected]>
> To: "YAESU Reflector" <[email protected]>; "FT-1000MP Reflector"
> <[email protected]>
> Sent: Sunday, March 10, 2002 6:56 PM
> Subject: [1000mp] SWR Meter and FT-1000MP
> 
> > Hello FT-1000MP Users,
> >
> > Because I have problem with one of my antennas I wanted to check, if the
> RF
> > cables between my MP, FL-7000, external SWR Meter and antenna box are
> right.
> > I put 50 Ohm dummy load instead of antenna and made a test. And it was a
> big
> > surprise for me to see difference between MP's SWR and external YAESU
> YS-60
> > SWR meter. First I tried with 50 Watts and external SWR meters shows 1:1.
> > But MP shows 1:1.3. So I increase the power to 100 Watts and external SWR
> > meter still shows 1:1.0, but internal rised to 1:1.7. Is that something
> > wrong with my MP?
> >
> > What is your opinion or suggestion?
> >
> > Best 73's
> > Pawel, SP7PS
> > SN7N in contests
> >
> >
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