[HamBrewers] Re: [VUHams] FW: 16 pictures for you Max 300W HF Linear

 

Ganesan,

 

Thanks for working on the noise reduction filter and glad to know the progress after our discussion some months back when I was plannimg to build a DSP based noise filter which was working out expensive, this will help greatly help for HF. 

 

73

Nitin [VU3TYG]

From: Namachivayam Ganesan <ganesan4u@hotmail.com>
To: vu3nkk krish <vu3nkk@yahoo.com>; vuhams <vuhams@yahoogroups.com>; hambrewrs <hambrewers@yahoogroups.com>
Sent: Saturday, 25 August 2012 8:18 PM
Subject: [VUHams] FW: 16 pictures for you Max 300W HF Linear [18 Attachments]

 

Dear nkk,

Thank you for testing my HF Noise reduction audio filter along with your project.

Thank you for our feedback on improvements.

the details of my filter LRR-10 (under testing)

The LRR10 is a high performance versatile audio filter that can be used with any receiver or transceiver. It can improve intelligibility of CW, phone, or data signals, and is especially well suited to radios that have inadequate I.F. or audio filtering. The LRR10 uses straightforward analog circuitry and no surface-mount components, so it's an ideal DIY project for Home brewers.

            Low-noise analog variable audio filter circuit used here is a low-pass filter with switched capacitors, elliptical, of 8th order for improved audio easily compares the reception with that of a receiver equipped with DSP filter.

             This circuit design follows a standard well-proven approach based on various kits available on WWW modifications have been done.

           

Features & specification

 

•  Variable Filter Bandwidth approx. 600-4000 Hz
•   2Watts Dc controlled audio amplifier.
•   PCB Size 95 x 60 mm.
•   12VDC Power.
•   Available as a DIY kit or fully assembled high quality components for reliable operation.

active device used MAX293 ,BB112&TDA1013B

73,

N.Ganesan

09363105352

Coimbatore

From: vu3nkk@yahoo.comTo: ;Subject: 16 pictures for you Max 300W HF LinearDate: Sat, 25 Aug 2012 19:42:35 +0530

Subject: 16 pictures for you

 

Dear Friends,

 

Furher development today on my 1st HF Boot project progress in the enclosed pic files.

Kindly give your feed back.

Tommorow attending the inverted V 40 mtr Antenna.

 

73's, krish, vu3nkk

 

 

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