Re: [IRCA] RF Conversion

[Tim Hills <thills@xxxxxxxxxxxxx>]

Craig,

I looked for something similar a while back and unless you have some 
very deep pockets you might want to try a different solution unless you 
want to home-brew something.

I use the twin coax that's used for satellite dishes. A balun on each 
end and the center conductors fed as a balanced line or a balanced 
preamp at the feed end with the power injector/DC block at the receiver 
end. Oddly enough it seems to work best with the grounding block about 
mid-point in the feed line. A 4:1 Balun wound with thin Litz on an 
Amidon 43 material core seems to work best for the 50 Ohm input on the 
receivers from ~60KHz to (over?) 30 MHz. I haven't tested the setup 
above the 10m band.

I have 3 MW stations putting fat signals into my back yard and the line 
runs right past the breaker box and I get very little noise pickup.

Just my $0.02

Tim Hills
Sioux Falls, SD

On 2/16/2013 13:44, Craig Healy wrote:
> I am beginning to see if there are any adequate RF to fiber optic 
> conversions, and conversion back to the same RF.  My goal is to use 
> fiber optic cable rather than coax or twisted pairs for antenna 
> connection.  Fiber optic cable doesn't pick up noise and has lower 
> loss than cable.
>
> I began with Google search of: "RF analog to fiber optic conversion"  
> That seemed to indicate that there is equipment to do that, and not 
> hugely expensive.
>
> FWIW, maybe other people can find something as well.
>
> Craig Healy
> Providence, RI


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