[TenTec] TT 509 Argonaut Sticking Relay

[JAMES HANLON]

Karl,

>From your description of the problem, I suspect that it may be a circuit one.  If possible, measure the voltage across the relay coil and see if, when it "sticks", the coil voltage has gone to zero.  If it is staying closed with zero voltage across the coil, then it is a relay problem.  

I'm not familiar with the relay used in the 509, but dry reed relays are quite common.  My Mouser catalog has five pages of them.  If you can give me a physical description and a manufacturer's name and part number I can probably help you find a replacement.  

Jim, W8KGI
  ----- Original Message ----- 
  From: Karl Schwab<mailto:schwab.karl at gmail.com> 
  To: tentec at contesting.com<mailto:tentec at contesting.com> 
  Sent: Monday, May 18, 2009 7:51 AM
  Subject: [TenTec] TT 509 Argonaut Sticking Relay


  The magnetic reed relay in my Ten-Tec 509 Argonaut hangs up on transmit
  until I power the radio off.  Therefore, I am wondering if I need to replace
  the relay or is it a problem in the circuit that is keeping this relay
  energized?  If I need to replace this relay, were would I find a
  substitute?  Thanks and 73, de KO8S, Karl