The goal of this project
is to provide to Amateur Radio beginners with a working QRPp CW
transceiver that they build and learning the knowledge of transmitting
and receiving equipment on the most of popular HF band 80 m.
This "Gnomik " transceiver contains two separate units: direct
conversion receiver (RX) based on modified DC receiver designed
by Vlad Polyakov RA3AAE and transmission unit (PA) based on standard
scheme frequency-doubler and amplifier. The RX's heterodyne operate
on a half of receiving frequency.
For the first time "Gnomik"
was designed at 1986 year by Oleg RV3GM after he has experimented
with RA3AAE DC receiver. Oleg updated receiver with transmission
unit and after some modifications "Gnomik "was ready.
There are some QSO's from Oleg's Log Book he has operated with
Output power of transceiver is 500 mW approximately. Sensitivity of receiver
is about 2 uV. Antenna's impedance 50 Ohm. "Gnomik"
powered by stabilized DC power supply unit 12:13,8
V @ 150 mA max. current (positive to
Optionally, you may insert to "Gnomik"
some modifications: RIT, side-tone, digital frequency meter,
output RF meter, S-meter, Antenna Tuning Unit. That's fine! How you like! But
don't forget, that the major advantage of direct conversion QRPp
equipment is it's simplicity! 72 and good luck!
2002. All rights reserved.