[Lowfer] remote "natural radio" receiver

[Douglas D. Williams]

Hey Pat. No, I'll probably just use some 2 conductor wire for the audio
feed to the sound card. I think I'll put the battery in my outbuilding and
a solar panel on the roof to keep the battery charged. Radio shack might
still sell those little audio isolation transformers for keeping the feed
wires from carrying all the 60 Hz + harmonics out to the unit.

I need to walk around my property with a portable RS4 just to see if I can
find a location quiet enough to make this even worth the trouble.

-Doug KB4OER

On Sat, Dec 1, 2012 at 8:49 AM, pbunn <pbunn at matrixei.com> wrote:

> Doug
>
> Are you going to run coax to the receiver? If so, you can use the coax to
> feed the power from a battery. Rg6 is cheap and bury able . I'd put a
> couple if common mode chokes in the kine also. They made more difference in
> my receiving installation than anything I have done.
>
> Pat
> N4LTA
>
> "Douglas D. Williams" <kb4oer at gmail.com> wrote:
>
>
> Years ago I built several of Michael Mideke's RS4 natural radio receivers.
> I'm thinking of dismantling one of them down to the circuit board,
> enclosing it in a waterproof box, and installing it on a mast perhaps 100'
> from my house. I'll still get a lot of hum, but it might let me hear the
> occasional whistler, dawn chorus, or other interesting signal from the
> comfort of my house.
>
> I've been checking around, and 12v batteries and weatherproof solar
> chargers seem to be everywhere these days, probably because so many folks
> are installing solar lighting, hummingbird feeders, and game cameras.
>
> The RS4 has a very low current draw, and a mic or line level (not headphone
> level) output, so it should be a good match for the mic or line level input
> of a computer sound card. What I don't want to do is carry the 60 Hz hum
> from the house to the remote RS4 via the sound card connection. What do you
> guys think is the solution? Perhaps a couple of 1:1 audio
> isolation transformers....one in the house and another near the RS4? Also,
> anyone know of a source of inexpensive, buriable 2 wire cable?
>
> -Doug KB4OER
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