[Lowfer] remote "natural radio" receiver

[Clint Turner]

FWIW, some of Steve's recordings of "Natural Radio" may be heard in the 
background of this rather cool video:

http://www.semiconductorfilms.com/root/Magnetic_Movie/Magnetic.htm

73,

Clint
KA7OEI/CT



Ed Phillips wrote:
> 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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