<HTML><HEAD></HEAD>
<BODY dir=ltr bgColor=#ffffff text=#000000>
<DIV dir=ltr>
<DIV style="FONT-SIZE: 12pt; FONT-FAMILY: 'Calibri'; COLOR: #000000">
<DIV>I have used the Open Collectors to control relays to select the LPF on my
external PA right from the start, and it has worked as expected right through
all the versions of PSDR over the past several years.</DIV>
<DIV> </DIV>
<DIV>The following may be stating the obvious, but sometimes we overlook the
obvious, so here it is!</DIV>
<DIV> </DIV>
<DIV>Note that the pins on J6 go towards ground when activated, so these need to
be connected to the ground side of your relays, there needs to be +12 V on the
other pin of all your relays for this function to operate. Also, the “External
Control” (button on v3.3.9) must be selected to activate or set up the OC
feature.</DIV>
<DIV> </DIV>
<DIV>73,</DIV>
<DIV>Luke VK3HJ</DIV></DIV></DIV></BODY></HTML>