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Richhgv
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Call Sign : 26CT3184
Posts : 5
Times Thanked : 0
Join date : 2019-06-27
QTH or Location : Glastonbury

Tx power loss Empty
PostSubject: Tx power loss   Tx power loss Icon_minitimeFri Jul 03, 2020 1:04 pm

I have a midland 78 plus multi (blue light)
I put a watt meter on it and l have been getting different readings on the same channel
It is telling me that I have 3w and 4w at different times (parked in the same place)
Any idea's???

Help much appreciated
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Cristi
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Cristi

Call Sign : 233CT246
Posts : 2
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Join date : 2019-06-28
QTH or Location : Campulung, Arges
Equipment Used : KPO DX-5000

Tx power loss Empty
PostSubject: Re: Tx power loss   Tx power loss Icon_minitimeFri Jul 03, 2020 1:52 pm

You need a dummy load for accurate measure.
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Victor
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Victor

Call Sign : 26-CT-3228 Ham M7VIC
Posts : 991
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Join date : 2019-11-10
QTH or Location : Bedford
Equipment Used : Various

Tx power loss Empty
PostSubject: Re: Tx power loss   Tx power loss Icon_minitimeFri Jul 03, 2020 2:49 pm

?? Pigeon on the antenna, moon passing overhead, passing lorry sucking away your power ?? Very Happy Just kidding Smile

Normally it's due to a dodgy connection, usually the patch lead, PL259 connectors can be problematic. Does the power change if you wiggle stuff around, like moving the watt meter or the coax to the antenna. In a mobile setup quite often the coax gets pinched depending on how you routed it and causes problems, (especially if squeezed through the door sill).

Doesn't sound like much help I know, but usually best to get the obvious stuff out of the way.

Hope you get to the bottom of it.

73s
Victor

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Richhgv
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Call Sign : 26CT3184
Posts : 5
Times Thanked : 0
Join date : 2019-06-27
QTH or Location : Glastonbury

Tx power loss Empty
PostSubject: Re: Tx power loss   Tx power loss Icon_minitimeFri Jul 03, 2020 3:08 pm

It seemed to move whan I wiggled (technical term)
the power lead from battery so tested that and taped fuse holder so it didn't move (spring type) on the joints and it still seems to happen I will have a look at the patch lead
Thanks for the reply
73s

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