[Elecraft] OT ... Coax DC isolator

2014-02-11 Thread John Saxon
Off topic here: I am experimenting with two different antennas and would like to switch between them with a relay.  I am considering getting an isolator that permits placing the DC control voltage on the rf coax.  Any thoughts on this?  I have never done this before and would appreciate any

Re: [Elecraft] OT ... Coax DC isolator

2014-02-11 Thread WILLIS COOKE
Cavalla, USS Stewart From: John Saxon johnbsa...@yahoo.com To: elecraft@mailman.qth.net elecraft@mailman.qth.net Sent: Tuesday, February 11, 2014 12:34 PM Subject: [Elecraft] OT ... Coax DC isolator Off topic here: I am experimenting with two different antennas

Re: [Elecraft] OT ... Coax DC isolator

2014-02-11 Thread Walter Underwood
elecraft@mailman.qth.net Sent: Tuesday, February 11, 2014 12:34 PM Subject: [Elecraft] OT ... Coax DC isolator Off topic here: I am experimenting with two different antennas and would like to switch between them with a relay. I am considering getting an isolator that permits placing the DC

Re: [Elecraft] OT ... Coax DC isolator

2014-02-11 Thread Barry LaZar
John, Does isolators are called bias-Ts. They are a common way to do what you want. You should be able to buy one without great difficulty. Just make sure that the one you buy is for the frequency range you plan to use it in. MFJ makes one for HF if that is where you plan to operate. 73,

Re: [Elecraft] OT ... Coax DC isolator

2014-02-11 Thread Svend Spanget
Here is an interesting article: http://www.ad5x.com/images/Articles/BiasT3amp.pdf Svend, OZ7UV __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post:

Re: [Elecraft] OT ... Coax DC isolator

2014-02-11 Thread mcduffie
On Tue, 11 Feb 2014 10:34:20 -0800 (PST), John Saxon wrote: I am experimenting with two different antennas and would like to switch bet= ween them with a relay. =A0I am considering getting an isolator that permit= s placing the DC control voltage on the rf coax. =A0Any thoughts on this? =

Re: [Elecraft] OT ... Coax DC isolator

2014-02-11 Thread Ian White
Spanget Sent: 11 February 2014 20:18 To: elecraft @ mailman . qth . net Subject: Re: [Elecraft] OT ... Coax DC isolator Here is an interesting article: http://www.ad5x.com/images/Articles/BiasT3amp.pdf Svend, OZ7UV

[Elecraft] OT ... Coax DC Isolator

2014-02-11 Thread John Saxon
Many, many thanks for the fine comments and suggestions.  I am going with the MFJ-4712 which is the bias tee and the relay and switch...complete and ready-to-go. Thanks again 73, John K5ENQ __ Elecraft mailing list Home:

Re: [Elecraft] OT ... Coax DC Isolator

2014-02-11 Thread Dick Dickinson
Are there possible precautions to take when running DC through a remote antenna (coax) switch that may go to ground when the power is off? Dick - KA5KKT __ Elecraft mailing list Home: