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Antentop is FREE e-magazine devoted to Antennas and Amateur Radio an
Special page devoted to
A 10- meter Band CW Transceiver
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ANTENTOP- 01- 2010, # 012 |
A 10- meter Band CW Transceiver |
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Vladimir
Polyakov, RA3AAE |
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It is a variant of a simple DC transceiver. Transistor
of PA works like a mixer in receiving mode. So, there is no any
commutation in the RF circuits. The transceiver has output power
0.35- Wtts, shift TX/RX- 400-Hz, RX sensitivity 2 microV. Power
voltage is 15-V, current at RX/TX- 30/120-mA. |
Inductor L4 has 18 turns of wire in 0.6-mm (23-AWG) diameter, winding
length is 12- mm, coiled on a form of 8-mm diameter. L3 has 9 turns
of wire in 0.25- mm (30- AWG) diameter, coiled on a ferrite ring
10- mm OD x 5- mm ID x- 10- mm- H with permeability 50, tap made
from 6-turn from "cold" end. L2 has 3 turns of wire in
0.25- mm (30- AWG) diameter, coiled above L3. Inductor L1 has 10
turns of wire in 0.6-mm (23-AWG) diameter, winding length is 14-
mm, coiled on a form of 10-mm diameter, tap made from 3-turn from
"cold" end. L5 has inductance 0.15- H. It is possible
to use collector's coil from an output transformer from any transistor
radio.
(DC- Tranceivers,
Moscow, P.H.: DOSAAF, 1984) |
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Figure
1 A 10- meter Band CW Transceiver
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January 22, 2020 22:19
