[sdiy] Listening and recording electromagnetic fields

[Dan Snazelle]

Or another fun an easy way Is to get a hold of an old SW radio that allows VLF reception 

The icom r71a was my first introduction to sw, and if you simply dial the tuner past 29.999mhz it starts over at zero

I went on to get my HF ham license based on the fun I was having building VHF , VLF and HF radios 

Search around for DIY VLF radio project and you can find many many schematics out there for projects which don't take much work 


However unless you live in a remote area , you won't get to hear too many of the NATURAL VLF signals as they seem to be covered up by all of mans creations !!!


OP: contact me off list if you need a few VLF project schematics 


Best 

Sent from my iPhone

> On Jul 8, 2015, at 12:06 PM, "Oren Leavitt" <obl64 at ix.netcom.com> wrote:
> 
> You can do similar with an old AM transistor radio.
> Tune it off of a station and snoop away. Sweep over the top octave/divider boards of organs/synthesizers, the patch cord jungle of a modular synth, listen to switching power supplies as the load varies from minimum to maximum,  etc...etc...
> 
> - Oren
> 
>> On 7/8/2015 2:37 AM, Jean Bender wrote:
>> Yes, exactly ! This instrument seems to be really cool, and i'd like
>> to know how it works, i haven't found so much schematics /
>> acknowledgement about this kind of stuff !
>> thanks !
>> 
>> 2015-07-07 13:56 GMT+02:00 Michael Zacherl <sdiy-mz01 at blauwurf.info>:
>>> something like that?
>>> https://zvukolom.org/instruments/elektrosluch-2/
>>> m.
>>> 
>>>> On 7.Jul 2015, at 7:24 , Jean Bender <lofideadbeat at gmail.com> wrote:
>>>> 
>>>> Hello !
>>>> Hope your summer isn't too hot as here in france..
>>>> Well, as i won't take hollidays, i have some time to learn and build
>>>> some electronic devices.. I'm actually looking for building myself
>>>> some electromagnetic fields recorder/listener.
>>>> I've already work and search around with very lofi 386 amp and
>>>> handmade coils, but i'd like to look after some better instruments.
>>>> WOuld somebody have some schematics or tricks to do that ? Are there
>>>> specific kind of components i should use ?
>>> 
>>> 
>>> --
>>> http://mz.klingt.org
>>> 
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