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Old 23-10-2016, 17:42   #1
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SWR problem

I have a radio shack swr. The VHF at the house will not transmit. I hook up the swr on 3 VHF', all theee do the same thing. Have the mic down, mov the dial all the way up then push switch on calibrate down to SWR. the dial is suppose to drop to 1.5 or so, mine stays up in the red near the top. I am on 200w for switch one. The third switch is on PEP. Middle switch starts at CAL, then leaving the VHF micced, switch to SWR.
At home I am using a power pack for 12 volts from 220. I used a meter and it is supplying 12.75 when not micced and 12.75 when the mic is pushed.
Now on the boat, the same VHF with the same SWR, drops to 1.5 when I switch the push to CAL.
On the boat I am running off of batteries, home is the power PAC.

Any ideas on what is happening? My transmissions at home can not be heard.

The power PAC I have on wire ,red, coming off the V+ and the black off the V-. Tested the antenna, on the boat it is fine. Using the same antenna at home.
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Old 23-10-2016, 17:58   #2
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Re: SWR problem

Same connectors and cable at home and on the boat? If not, likely a problem in the cable.

If the same cable and connectors, is the antenna at home out in free space like at the masthead? Some antennae have the SWR influenced by nearby conductors.

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Old 23-10-2016, 18:34   #3
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SWR problem

All cables and connectors were the same. I actually took the antenna from home out to the boat and tested eveything there. SWR to 1.5 on the boat. At home it's stays way up in the red zone. The only difference of boat from home is the power supply. Boat is house batteries and home is a power PAC that coverts from 220 to 12v.
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Old 23-10-2016, 19:26   #4
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Re: SWR problem

high swr is a cable / antena issue. and not a radio issue.

your power should be fine and not make any difference
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Old 24-10-2016, 05:05   #5
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Re: SWR problem

It turns out the the connector to the radio had the center, positive, wire was not connecting properly all the time. From last posting I rechecked the continuity and found the problem. Thank you all.
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