1500 watts at 50 ohms gives 274 volts. That could be 548 volts if the
SWR is 2:1. Current at 1500 watts and 50 ohms is 5.5 amps, 11 amps at
2:1. Give them a fair margin for reliability, as much as 2:1, so get
1100 volt 22 amp relays. Not trivial at 1500 watts!
73 de WO?W
Mikael Larsmark wrote:
>Hello!
>
>I wonder what kind of relays should I pick when building antenna
>switches. The coax relays are to expensive so that is not an option.
>
>I have actually used car relays for a while and they seem to work
>quite ok. I would like to know though what ratings should I suppose
>to look after? How many amps, the width between the "connectors"
>etc. should they handle? Of course this depends on how much
>SWR and power I'm using but if I say that they should handle
>1.5kW and an SWR of 2:1, atleast!?!
>
>//Mike (SM3WMV // SM3W)
>
>
>_______________________________________________
>
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>Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
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>
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