The complete article is published in souveneer of HFI2008 and in souveneer of HAMEXPO2008 or mail to vu2hmy@yahoo.co.in

HMY2K8 - A MULTI BAND HF TRANSCEIVER

By Dr. R. RAJASEKHAR, VU2HMY


TECHNICAL SPECIFICATIONS:
Frequency coverage: Ham Bands
3.500 - 3.600 M.Hz ( 80 M )
7.000 - 7.100M.Hz ( 40 M )
14.000 – 14.350 M.Hz ( 20 M )
21.000 - 21.350 M.Hz ( 15 M )
28.000 – 28.350 M.Hz ( 10 M )
Frequency control:
Ver. 1: Direct Digital Synthesizer (DDS) with 1 Hz step continuously variable vfo
with 20 memory channels. 2 line LCD display. Dual VFO, Split , RIT, Key pad /
rotary encoder for frequency entry.
Ver. 2: 5 Band Heterodyne VFO with PIC frequency counter to reduce cost of the
project.

Receiver:
Single conversion receiver with 10.000 M.Hz Cohn filter.
Low noise figure, 2.2 K.Hz SSB band width, 1.5 W audio O/P.
Transmitter:
RF O/P - SSB - 90 W ( DC PWR I/P )
CW - 60 W ( DC PWR I/P )
Built in CW side tone, CW delay, pwr meter, MOS FET Push Pull PA.
Dimensions: 8.5 X 7 X 4.5 inches

Dr.R.RAJASEKHAR