[Elecraft] K2 to antenna Power

[Robert]

You need as a minimum a capacitor in the coax center lead to your K2 in 
order to prevent DC from getting into the radio.  Second you will need a 
choke on your low voltage supply at a value that presents a large 
impedance to RF frequencies you are operating on and therefore blocking 
RF from entering your small supply voltage.  There really should be 
other components to ensure a fairly flat impedance reading across the 
bands you wish to operate.  The Handbook should have some examples of this.

Regards,
Robert
VE3RPF


k7hbg at dslextreme.com wrote:
> Good evening Elecrafters, may your Monday be a restfull one!
>
>  I would like to send a low voltage limited current up the coax from my K2
> to the antenna for powering a small device. What would be the best way to
> inject this voltage into the antenna feed (coax) at the K2 and recovering
> it "up the stack"? I was hoping to continue supplying this voltage even
> while transmitting 100 watts.
>  I thought that the transverter manuals might have some advice about
> powering preamps but, not a word.
>
>  Best regards, Bob K7HBG.
> K2# 2836 which "Will only be pried from my cold dead fingers"
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