[GreenKeys] Is there a solid-state equiv. for a polar relay

[Albert Last]

Do you happen to have a diagram of this configuration? I don't want to "smoke " the isocoupler by just guessing...I have several isocouplers like the 4n27 available. Thanks 

    On Tuesday, January 30, 2018 7:44 AM, Jeffrey Angus <jdangus at att.net> wrote:
 

  On 1/30/18 8:13 AM, Albert Last wrote:
  
  I need to key my Kenwood TS950 for FSK in my 60 ma  loop with
 a dry set of contacts. Is there a solid state simple good device that replaces the old polar relay? 
 A bridge rectifier, a few resistors and an opto-coupler like a 4N27.
 The bridge rectifier make the "relay" non-polarity sensitive.
 
 A note on polar relays: When used in a 60 mA non-polar (on/off)
 loop, they had their second coil biased at 30 mA to switch it to Space
 when the Mark (60mA) signal disappeared.
 
 
 
 -- 
"I am a river to my people."
Jeff-1.0
WA6FWI
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