The simple regenerative receivers were published at
QRP- C. Reference Book- #3,” page 6. I have done the receivers,
they work pretty well!
73/72! I. G.
“U- QRP- C. Reference Book- #3” 1991 year.
Transistor can be any RF FET. Output transformer can
be any output transformer from a transistor radio.
L1 depends on used band. I used collections inductors
wired at form diameter 20 mm with wiring length 25 mm. For 10-
20 meters, L1 contains 9 turns, L2 contains 2 turns near cold
end L1. For 20- 40 meters L1
contains 15 turns, L2 contains 3 turns near cold end L1. For 80-
160 meters L1 contains 45 turns, L2 contains 10 turns near cold
end L1. Antenna capacitor 120-pF may be 2- 120-pF in value.
Data for L
the same as for above receiver. Tap made from 1/6 parts of the
L. Resistor on *51 Ohm should be pickup
for used band (or, the same, used L). Inductor for
2.5 mH is home brew, it contains 200 turns onto a ferrite ring
20x12x4 mm, permeability 600. Transistor used in regenerative
stage should be good RF transistor with f = 300 MHz, and gain
=100 and more.
Any audio transistors
can be used in audio amplifier.
Hope, you will have fun with the receivers!
73! Igor, VA3ZNW