Yes.
This is it.
On 12/26/2011 2:35 PM, Nitin Muttin wrote:
Rahul,Is this what appeared in the Nov QST. The DSP module itself is 140 USD + other components. I think I will try the ckt suggested by Yan73'sNitin [VU3TYG]
From: rahul srivastava <lkorahul@yahoo.com>
To: HamBrewers@yahoogroups.com
Sent: Monday, 26 December 2011 12:11 PM
Subject: Re: [HamBrewers] Re: Required- Noise reduction circuits for speaker
--- On Mon, 26/12/11, Yannick (XV4Y) <yannick.devos@online.fr> wrote:
From: Yannick (XV4Y) <yannick.devos@online.fr>
Subject: Re: [HamBrewers] Re: Required- Noise reduction circuits for speaker
To: HamBrewers@yahoogroups.com
Date: Monday, 26 December, 2011, 8:03 AM
Good morning all,I forgot to tell that you can have MAX293 at no cost from Maxim. They sent me samples (two units) when I ask for. They are not able to ship to Viet-Nam so I have to ship to my parent's home in France and then they send it to me. Futurlec have Maxim's IC at a fair price. http://www.futurlec.com/ICMaxim.shtml 73, Yan. --- Yannick DEVOS - XV4Y http://xv4y.radioclub.asia/ http://varc.radioclub.asia/ http://www.qslwatch.com/ Le 25 déc. 2011 à 14:56, Rajesh K a écrit : > [Attachment(s) from Rajesh K included below] > > Nitin, > > You could try this one also(A $1.00 Noise Reducing Speaker in the attached newsletter). I have homebrewed a speaker for my IC-718 and got some improvement. > > 73 > Raj VU3RGK > > From: HamBrewers@yahoogroups.com [mailto:HamBrewers@yahoogroups.com] On Behalf Of vu3tyg > Sent: Saturday, December 24, 2011 11:39 PM > To: HamBrewers@yahoogroups.com > Subject: [HamBrewers] Re: Required- Noise reduction circuits for speaker > > > Thanks Yan for the information, will try your suggestion > > 73's and HNY > Nitin [VU3TYG] > > --- In HamBrewers@yahoogroups.com, "Yannick (XV4Y)" <yannick.devos@...> wrote: > > > > Hi Nitin, > > > > This circuit works great as Audio LP filter. I use it in my Bitx20 with great results. > > Filtering high frequencies spikes it also reduce the need for an AGC. > > http://lpistor.chez-alice.fr/filtrebf.htm > > > > Try to look for circuit using MAX293 or similar (MAX291 or 292 use Butterworh or Bessel, not elliptic filters), you will find a lot on internet. > > Some also includes an active HP filter built around an OP-Amp. > > > > Sometime this kind of filter is called SCAF. > > > > 73 and HNY, > > Yan. > > --- > > Yannick DEVOS - XV4Y > > http://xv4y.radioclub.asia/ > > http://varc.radioclub.asia/ > > http://www.qslwatch.com/ > > > > Le 22 déc. 2011 à 23:19, Nitin Muttin a écrit : > > > > > > > > > > > Has anyone got any simple noise cancelling circuits either dsp or otherwise which would remove the high tones on ssb reception, this includes the background radio noise. I understand that there was an article in the QST November 2011 issue. > > > > > > 73's > > > Nitin [VU3TYG] > > > > > > > > > > > > > > Attachment(s) from Rajesh K > > 1 of 1 File(s) > > noise reducing speaker.pdf > >
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