Optional reed relay version

When the opto-isolator is triggered it will conduct the output transistor to saturation. This is normally all that is needed to trigger the radios PTT.  But some radios need a absolute ground on the PTT to transmit and so here is a reed relay modification that will resolve this issue.

The Club Website will have the latest version of these directions. 
Take a look at http://w4fhu.org/digital  or contact me at joel@cyberbest.com