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 Unable to get SWR under ten????

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BillMasen
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Posts : 19
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Join date : 2020-04-20
QTH or Location : Co Durham
Equipment Used : President Grant 2

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PostSubject: Unable to get SWR under ten????   Unable to get SWR under ten???? Icon_minitimeWed Apr 22, 2020 6:08 pm

Baffled guys, President Grant 2 feeding a magmount base on a steel plate in front of my window, OR same President Grant 2 using Mag mount or Direct roof mount on my van roof. Click Forward, Adjust down to SET /Infinity line. Click switch into REFLECT SWR stays on near as dammit 10 . tried using different antenna but SWR does not vary. tried adjusting antenna length, still no variation. I'm totally baffled. Can a Mag mount be defective??
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Gary1262
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Call Sign : 163-CT-1412
Posts : 7
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Join date : 2020-04-22
QTH or Location : South Wales
Equipment Used : SS3900EU

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PostSubject: Re: Unable to get SWR under ten????   Unable to get SWR under ten???? Icon_minitimeWed Apr 22, 2020 9:06 pm

Hi Bill,
Could be your mag mount. Where the coax goes into the mag mount, there might be a loose connection there. Is it possible to check the soldering under the mag mount? Might not be possible to visibly check because of plastic / rubber covering and don't suggest you break into that.

Another possible cause could be a faulty patch lead. You might be using at least 2 in your set up.
I've had 'dodgey' connections w.r.t soldering inside the PL259 plug, especially if the leads are old and have had lots of use.

Not familiar with you rig and it's SWR controls. Have you got a dummy load? I've found them useful for checking the power output of a rig, and the state of patch leads and power output of rig.

If using a 50 Ohm dummy load and a SWR meter, if you get a 1:1 (ideally) SWR, then at least you know your rig's controls and patch leads are working ok, then the fault must be with magmount and / or antenna.

All the best,

Gary
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BillMasen
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Join date : 2020-04-20
QTH or Location : Co Durham
Equipment Used : President Grant 2

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PostSubject: Re: Unable to get SWR under ten????   Unable to get SWR under ten???? Icon_minitimeWed Apr 22, 2020 9:30 pm

Thanks Gary I'll take a look at the mag mount etc, I may also just knock up another patch lead. Cheers.
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BillMasen
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Posts : 19
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Join date : 2020-04-20
QTH or Location : Co Durham
Equipment Used : President Grant 2

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PostSubject: Re: Unable to get SWR under ten????   Unable to get SWR under ten???? Icon_minitimeThu Apr 23, 2020 8:31 am

Steel roof , mate. Thanks for getting back to me.
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PostSubject: Re: Unable to get SWR under ten????   Unable to get SWR under ten???? Icon_minitime

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