[R-390] Filters

[John Saxon]

I am not as "savvy" as you folks when it comes to the electronics, but I am a "savvy" software guy who has done a lot of low-level, embedded stuff (including micro-coding on array processors for you old-timers out there).  I have a couple of home projects using microcontrollers and I enjoy playing with them.

Anyhow, you folks have my curiosity up about the software requirements to do a DSP filter suitable for Collins mechanical filter replacement.  Can some of you gurus point me to where the math algorithms are defined?  Gotta be on the web someplace :-)

FWIW I currently have a 390 and a 390A.

Thanks & 73,
John
K5ENQ
Pearland, TX


--- On Fri, 2/15/13, mlmccauley at att.net <mlmccauley at att.net> wrote:

> From: mlmccauley at att.net <mlmccauley at att.net>
> Subject: Re: [R-390] Filters
> To: R-390 at mailman.qth.net
> Date: Friday, February 15, 2013, 8:23 PM
> 
> Absolutely.
> 
> I've seen those come and go. The concept is great, but the
> market is very limited, hence the cost.
> 
> A savvy ham with the proper background could homebrew a very
> nice filter for a relatively cheap price. Soldering the
> hardware together would be a fairly easy weekend project,
> assuming you had a surface mount adapter board for the DSP
> chip. The software would take many weeks to write and even
> longer to debug.
> 
> 
> 
> 
> On 2/15/2013 8:05 PM, Bob Camp wrote:
> > Hi
> > 
> > Thus the variety of outboard dsp filter boxes that have
> shown up over the years. Once you get them into production,
> the cost is high enough that there is a very limited
> audience.
> > 
> > Bob
> > 
> 
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