4uH/1turn

T2

1turn/4uH

T1

120pF

C3

120pF

C1

5pF

C2

1 2

34 5

3

4

10M

R1

5

16

2

6AK5

V1100

VR1

10k:600 Ohms

T3

0.027uF

C9

600 Ohms

+6.0 Vdc

82pF

C6

bandspread

bandset

4-20pF

C7

150pF

C4

balance

T1,T2: 4uH ferrite, cup-tuned, 10mm sq., shielded; pry off shield to wind 1 coupling-turn on each inductor

Headphones: 600 Ohm impedance or higher; change T3 to match phones used

Mike, AA1T

J

L2: 1 turn of #18 enamelled wire located at the center of L1.

L2

L1

5-15pF (x2)

C5a-C5b

+60 Vdc @ 5mA

L1: 4uH; 34 turns with center-tap, #18 enamelled wire on 10mm diameter form.

+

100uF

C8

10nF

C10

+

47uF

C11

regeneration

40m 0-V

-0 W

heatston

e Bridge

Rege

nerative

Rece

iver