John, I can't beat Bernie's reply from experience, but I will add that 300 watts of carrier would produce 2.45 amps of current into a 50 ohm load and 2.04 amps into a 72 ohm load, so you won't be anywhere near "overloading" the 10 amp rated contacts.
Personally I use a mercury-wetted relay to switch my tuned-to-50-ohm antenna load between my transmitter and receiver. The transmitter can deliver as much as 600 watts CW from my SB-200, which corresponds to 3.46 amps into 50 ohms. My relay is a Western Electric 276 rated for 5 amps "DC." I do not hot switch it, at least intentionally, since I have a timed QSK system. It holds up just fine in this service. Jim Hanlon, W8KGI ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/[email protected]/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: [email protected] To unsubscribe, send an email to [email protected] with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
