Re: Key Line Interrupter w/SteppIR
Posted by
Mike K2MK on
May 10, 2012; 11:30am
URL: http://elecraft.85.s1.nabble.com/Key-Line-Interrupter-w-SteppIR-tp7545371p7546331.html
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=2http://www.telepostinc.com/STR.htmlhttp://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