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 swr/power meters

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26cz455
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26cz455

Call Sign : 26CZ455
Posts : 124
Times Thanked : 4
Join date : 2019-10-23
QTH or Location : No mans land ( Birmingham )
Equipment Used : Yaesu 450D, SS6900, Cobra148 baofeng UV5R, Antron A99, lots of wire things
Age : 69

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PostSubject: swr/power meters   swr/power meters Icon_minitimeThu Oct 31, 2019 5:09 pm

As above, but just how accurate are they. I have a small CRT combo meter and if what its telling me is true im very pleased with my 6900n its telling me a tad under 75w on FM and a tad over 40w AM.
The user.s manual isn't much help I think it only list output for the low power model

70thirds All Tom
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m fletch
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m fletch

Call Sign : 26-CT-3625
Posts : 26
Times Thanked : 3
Join date : 2019-09-03
QTH or Location : Mansfield
Equipment Used : Yaesu FTDX 3000

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PostSubject: Re: swr/power meters   swr/power meters Icon_minitimeThu Oct 31, 2019 7:11 pm

I doubt it's doing 75watts more like 40.
is the meter insulated try a different location I can get my walky-talky power to go up or down just by placing it near computer or steel bench
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26cz455
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26cz455

Call Sign : 26CZ455
Posts : 124
Times Thanked : 4
Join date : 2019-10-23
QTH or Location : No mans land ( Birmingham )
Equipment Used : Yaesu 450D, SS6900, Cobra148 baofeng UV5R, Antron A99, lots of wire things
Age : 69

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PostSubject: Re: swr/power meters   swr/power meters Icon_minitimeThu Oct 31, 2019 7:31 pm

Hello Fletch,
That's a good point mate, its about 10" from the radio ill try a longer patch lead, ?????? would a lead screen help I wonder.

Cheers Matey 70thirds
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26cz455
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26cz455

Call Sign : 26CZ455
Posts : 124
Times Thanked : 4
Join date : 2019-10-23
QTH or Location : No mans land ( Birmingham )
Equipment Used : Yaesu 450D, SS6900, Cobra148 baofeng UV5R, Antron A99, lots of wire things
Age : 69

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PostSubject: Re: swr/power meters   swr/power meters Icon_minitimeThu Oct 31, 2019 7:52 pm

Just tried it again. Meter 6ft from the radio sat on a wooden table 75 dropped to a scant 60 on FM but still showing 40 on AM, I guess the meter telling porkies Crying or Very sad Oh well least I don't need to keep turning it down Twisted Evil

Tom
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GaryWilson
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Call Sign : 26-CT-1836 Ham 2E0GGQ
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Equipment Used : Radios & Wires & Stuff!
Age : 55

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PostSubject: Re: swr/power meters   swr/power meters Icon_minitimeSat Nov 02, 2019 6:37 am

You should be testing on a dummy load as well for the most accurate reading. A foot or two of patch lead should be just fine.

73's Gary.
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AppleTree
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AppleTree

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QTH or Location : Essex
Equipment Used : I Don't Even Know...
Age : 100

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PostSubject: Re: swr/power meters   swr/power meters Icon_minitimeSat Nov 09, 2019 3:21 pm

GaryWilson wrote:
You should be testing on a dummy load as well for the most accurate reading. A foot or two of patch lead should be just fine.

73's Gary.

I agree here, I have a few meters that are very wrong on the antenna but read more of less correct when on a dummy load.
While of course a meter that reads incorrect when on an antenna is no use at all in reality it does proove it's good to test on a dummy load before you start playing with radios etc...
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