[Amps] Relais for an antenna crossover switch

[Tom W8JI]

> What do you suggest, do you think that would be better to 
> use the
> smaller 30A relais (more compact design) instead of bigger 
> vacuum relais?

I cannot understand why you need a big vacuum relay unless 
switching speed is a problem, or why you need a 30 ampere 
relay.

Even a relay like a Tyco RTD140 series will handle 5-10 kW 
at HF if you do not hot switch and it has a very short RF 
path. I suggest you buy and test a few small relays on 10 
meters to establish your own RF rating. Long lead lengths 
will hurt anything you try to do. It's all about the RF path 
through the relay, not the contact buttons.

73 Tom