On Sat, Nov 19, 2011 at 12:26 AM, Jim fuller - N7VR <n...@fuller.net> wrote:
> Hi Gary, > > I would use something like a DOW-KEY Transmit-receive relay. Connect the > receive only antenna to the receive side and the transmit antenna to the > transmit side. The antenna connection on the Dow-Key to the output of the > Flex-3000. Use the TX-OUT to key the DOW-Key Relay. My personal choice > would > be one like: > > http://www.ebay.com/itm/Dow-Key-Relay-12-VDC-Coil-TR-Extra-Contacts-Nice-/22 > 0875136188?pt=LH_DefaultDomain_0&hash=item336d2f1cbc You will notice that the Dow-Key relay has a separate set of contacts. The purpose of these contacts is to key the rig AFTER the coax relay has switched so that the rig doesn't produce RF before the coax relay has switched. Use your independent PTT circuit to key the relay then use the extra contacts on the relay to key the rig. That will ensure that the relay has switched BEFORE PTT is asserted to the rig. -- Brian Lloyd, WB6RQN/J79BPL 3191 Western Dr. Cameron Park, CA 95682 br...@lloyd.com +1.767.617.1365 (Dominica) +1.916.877.5067 (USA) _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
