[NJARC] A $40 Software-Defined Radio - IEEE Spectrum

[Al Klase]

Mike,

This is another manifestation of Moore's Law 
<http://en.wikipedia.org/wiki/Moore%27s_law>. Your four racks of 
equipment or an entire super computer of 1975 can disappear inside a 
single 2-dollar IC in 2010.

Kinda makes my head hurt,

Al

On 12/29/2013 11:45 AM, Mike Feher wrote:
> Just remember
> Reply = Poster
> Reply All = Everyone
>
> _________________________________________________________
> I actually built my first SDR back in the very early 1970's. The first one
> used IIR (infinite impulse response, recursive) digital filters and serial
> arithmetic. The next iteration that went into production used FIR (finite
> impulse response, non-recursive) filters. We used DDS (easy to use for I & Q
> channels) for tuning and FFT for signature analysis of recovered submarine
> signals. This was for the Navy's ASW fleet, at the time mostly installed in
> the P3-C aircraft, and later aboard helos (LAMPS) and subs. Amazing what
> they can do now. Certainly have come a long way. 73 - Mike
>
> Mike B. Feher, N4FS
> 89 Arnold Blvd.
> Howell, NJ, 07731
> 732-886-5960
>
> -----Original Message-----
> From: njarc-bounces at mailman.qth.net [mailto:njarc-bounces at mailman.qth.net]
> On Behalf Of Al Klase
> Sent: Sunday, December 29, 2013 11:21 AM
> To: njarc at mailman.qth.net
> Subject: Re: [NJARC] A $40 Software-Defined Radio - IEEE Spectrum
>
> Just remember
> Reply = Poster
> Reply All = Everyone
>
> _________________________________________________________
> Hi Joe,
>
> Thanks for the link. The video is a good introduction to thia subject.
>
> I've been messing around with these "dongles" for a while now. In fact the
> last three I bought were 9 bucks a pieces, shipped, from China of course,
> via E-bay. They actually work fairly well, especially when you consider that
> there's virtually no money involved. You need to buy or build an
> up-converter if you want to tune below the bottom limit of the dongles
> frequency range which is something like 24 MHz.
>
> There are a number of free software packages available. My current favorite
> is SDR-Console Version 2. http://v2.sdr-radio.com/ Stuff like this even
> decodes FM stereo. There's some potentially confusing software-geek things
> that need to be done to get the proper drivers loaded so the PC can talk to
> the radio, but it's not too time consuming.
>
> I've had a lot of fun exploring software-defined radio. Talk to me if you
> need help.
>
> Best regards,
> Al
>
> On 12/29/2013 10:14 AM, TrainBee at aol.com wrote:
>> Just remember
>> Reply = Poster
>> Reply All = Everyone
>>
>> _________________________________________________________
>> This was sent to me from the Yahoo Heathkit users group.  The
>> technology here exceeds my current abilities, but I'm sure there are
>> members here who understand it.
>>    
>> Here is the link to copy and paste
>>    
>>                        
>> http://spectrum.ieee.org/geek-life/hands-on/a-40-softwaredefined-radio
>>

-- 
Al Klase -- N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/