[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
> _______________________________________________
> 1000mp mailing list
> 1000mp at mailman.qth.net
> http://mailman.qth.net/mailman/listinfo/1000mp



	
		
__________________________________
Do you Yahoo!?
Friends.  Fun.  Try the all-new Yahoo! Messenger.
http://messenger.yahoo.com/ 


More information about the 1000mp mailing list