Hi Jack, Absolutely. If you transmit at 500 watts while the SDA-100 is tuning you can damage your DB-18 EHU. The interruptor doesn't provide the actual protection. It just forces you to use a separate key out cable between the K3 and KPA500. This is the cable that you would then route through a SteppIR control device which could be either the $82 Tuning Relay option for the SDA-100 or the $78 N8LP SteppIR Tuning Relay external device. You can get very specific advice at the SteppIR Yahoo group.
http://www.prestosell.com/cgi-bin/order.pl?ref=Fluidmotion&fm=2 http://www.telepostinc.com/STR.html http://groups.yahoo.com/group/SteppIR/ 73, Mike K2MK WE5ST wrote > > Do I need to use the Key Line Interrupter with this setup? Seems that > would be the case but I don't understand how the separate key line then > protects the SteppIR for power during tuning operations. > > I have a SteppIR, DB-18 3 element using the SDA-100 controller, adding > the KPA-500 to my K-3 station. > > Thanks! > > Jack - WE5ST > -- View this message in context: http://elecraft.365791.n2.nabble.com/Key-Line-Interrupter-w-SteppIR-tp7545371p7546331.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
