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
LRR-102 (LOW NOISE VHF PREAMP) -Under testing
APPLICATION:
73,
N.Ganesan
09363105352
Coimbatore
Attachment(s) from Namachivayam Ganesan
3 of 3 Photo(s)
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