Kit No Longer Available
This Permability Tuned Oscilator Kit for 160-20 meters gives
flexability
to your radio projects. It will tune over a wide range
200 kc to 500kc depending on band.
About 13 kc per revolution of the tuning dial.
You can add this to your simple transmitter or direct
conversion receiver and not be rock bound.
This PTO can be trimmed down to fit into
a very small place.
Those are 1/4 watt resistors and a 6-32 thread for size.
WA6OTP
PTO/VFO
Parts list
10
uf x 2
.01
uf x 5
*
120 pf x 3
change for band
*
47 uh
change for band
100
ohm x2
470
ohm
1
k ohm
100
k ohm x3
78L08
MPF
102
2N2222
2N2907
1N914
*
28 gage wire change for
band
pc
board
pc
strip
6-32
screw
O
ring
coil
form
bracket/pem
nut
1/4
nut
-------------------------------------------------------------------------------------
Meters
C9
C11
C12
Choke Wire gage Turns
160 470pf 470pf
470+330pf
100uh
31-32
118
+- 128”
80 330pf 330pf 330pf
100uh 27-28
76 +-
86”
5 mhz 240pf 120pf 240pf 47uh 27-28 60 +- 67”
40 120pf 120pf 120pf 47uh 27-28 60 +- 70”
30 120pf 120pf 47pf 47uh 27-28 50+- 60”
20 47pf 47pf 47pf 47uh 24 44+- 55”
5 mhz 240pf 120pf 240pf 47uh 27-28 60 +- 67”
40 120pf 120pf 120pf 47uh 27-28 60 +- 70”
30 120pf 120pf 47pf 47uh 27-28 50+- 60”
20 47pf 47pf 47pf 47uh 24 44+- 55”
These numbers are so you can change bands. 1.050 inches off wire per turn, better to wrap a few more and then take some off.
Use only 5% or NPO caps...
