[1000mp] SWR Problems with Mk-V Field

[Bob Main]

Ron, just wondering what lengths of coax are you talking about?  I had
always been told that it needed to be as short as possible and that it could
be RG-58.

Bob
KB4CL

-----Original Message-----
From: 1000mp-bounces at mailman.qth.net [mailto:1000mp-bounces at mailman.qth.net]
On Behalf Of W4LDE-Ron
Sent: Tuesday, January 22, 2008 7:15 PM
To: All about Yaesu 1000mp
Subject: Re: [1000mp] SWR Problems with Mk-V Field

Carl,

The change may be caused by the length of the coax between the rig and 
the remote tuner.  I had a similar difference in readings using 
manufactured coax w/ connectors between the amplifier and the rig and 
the amplifier and the remote tuner.  See if you have some different 
lengths of coax and see what readings you get.  I average about .2 
differences after I changed the lengths.  Frankly I think that you will 
never see the same readings and from your data below that meters are 
within tolerances.

73 de
Ron W4LDE

carl at UDel.Edu wrote:
> I have a Mark-V Field hooked up to a G5RV and matched with a LDG AT200Pro
autotuner.  I noticed the other day that my autotuner and my external
watt-meter were claiming a 1:1 match, but the SWR meter on the Field was
claiming 1.7:1.  While I don't expect everything to always read identical, I
thought this rather strange.  I switched to a 50 ohm dummy-load, and did
some investigating using the dummy-load:
>
> 160m - 1.1:1
> 80m - 1.1:1
> 40m - 1.0:1
> 20m - 1.3:1
> 17m - 1.4:1
> 15m - 1.4:1
> 12m - 1.4:1
> 10m - 1.3:1
>
> All of these values were read from the SWR meter on the Mark-V Field; the
autotuner and my external watt-meter/SWR meter are reading 1.0:1 on all
bands  Might this be an indication of a problem, or have others noticed this
discrepancy?  Any feedback would be most appreciated!
>
>
> Thanks, and 73's!
>
> Carl - K3NTH
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