[1000mp] Different SWR at SSB and CW
Sergey
a1sy at yahoo.com
Mon Jun 7 18:04:25 EDT 2004
Douglas
Yes, I still can use my TRCVR.
And I undestand that SWR of my antenna not changing and that SWR meter of Mark V installed before
antenna tuner.
I used 1000MP several years before and never got this problem and as I said before I checked with
my friend that have MP Field.He is getting difference between CW and SSB just 0.1-0.2.
Besides,even I know that my CW reading is correct and I have CW SWR about 1.2 it's still pretty
bother me to see 1.6-1.7 SWR on SSB with some peaks going to 1.8-1.9.
Let me ask you another question.How do I know that my tuner works right at CW?May be it's read
right at SSB and wrong at CW?
My Mark V is still under waranty and I think that it may be some issue with SWR reading.
BTW,when I tried dissable the Tuner I have the same results.
Thanks,Sergey
KO5D
--- KB9GKC at aol.com wrote:
>
>
> > 7100 CW 1 1.1 200 200
> > 7100 SSB 1.7 1 200 100
> > 14160 CW 1.2 1.2 200 200
> > 14160 SSB 1.6 1.1 200 120
> > 21207 CW 1.3 1.2 200 160
> > 21207 SSB 1.7 1 200 85
> >
>
> Hello All,
>
> The SWR at the antenna never changes (unless antenna falls down) but your
> readings will change when you measure it at different distances along the
> feedline. For example: A yagi antenna at the feedpoint is 1.5:1 SWR, if you
> measure the SWR 20 feet away it might read 1.3 and at 21 feet an SWR of 1.2 and at
> 22 feet 1.1. The real SWR at the antenna is still 1:5:1. Also the SWR will
> never appear higher on the feedline then it actually is at the antenna, it will
> only appear correctly or lower. If you remember back to your velocity factor
> of coax, this has everything to do with measuring the SWR at the correct spot
> on the feedline.
>
> On a brighter note, stop worrying about idiosyncrasies and get on the air and
> have fun.
>
> 73
> Douglas
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