[Lowfer] remote "natural radio" receiver

[Ed Phillips]

Steve McGreevy, who's making them now [original design was Frank 
Cathell's, not Mikes] put one out on the desrt about a mile or so from 
his house and uses a low-power FM link to bring it into the shack.  
Works really well.  Lots of neat recordings on his 'Sounds of Natural 
Radio' web site.

Ed

Pat Bunn wrote:

>The problem is that the audio wire will pick up common mode hum and noise. I definitely  would use a transformer.
>
> Maybe use cheap shielded TV cable for the audio feed plus the transformer. That's probably cheaper than two wire cable.
>
>
>Pat
>Pat
>
>"Douglas D. Williams" <kb4oer at gmail.com> wrote:
>
>  
>
>>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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