Re: [AMRadio] Relay Rating (JAMES HANLON)

2009-12-17 Thread John Dilks K2TQN
HI Jack, 24 or 48 volts DC should do it. Used in telephone work, #1ESS and other systems. It is fast operating. Try 24 volts first. (I forget now.) 73, John At 05:48 AM 12/17/2009, you wrote: Jim Hanlon, W8KGI Do you have the relay specs for a Western Electric 303J? It is an octal and may

Re: [AMRadio] Relay rating

2009-12-15 Thread Bernie Doran
that is an issue, Bernie W8RPW - Original Message - From: John King k5...@yahoo.com To: amradio@mailman.qth.net Sent: Monday, December 14, 2009 10:45 PM Subject: [AMRadio] Relay rating Will 10 amp rated contacts on a relay handle 300 watts of carrier from an AM transmitter? Your opinion based

Re: [AMRadio] Relay Rating

2009-12-15 Thread JAMES HANLON
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

[AMRadio] Relay rating

2009-12-14 Thread John King
Will 10 amp rated contacts on a relay handle 300 watts of carrier from an AM transmitter? Your opinion based upon your experience will be appreciated. Thanks and 73, John, K5PGW __ Our Main Website: http://www.amfone.net