30 Meter Band VCXO Kit (for Universal Receiver)

The parts in this VCXO Kit are designed for 30 Meter reception from approximately 10100 to 10122 KHz.
The Kit includes the following parts/items:

L1 FT37-61 20T#26Red
L2 T37-2 34T#28Red
L3 FT37-61 13T#26Red
T1 T37-2 21T#26Red::4T#26Green
C3 100pF NPO marked 101
C6 22pF NPO marked 220 or 33J NPO
C8 68pF NPO marked 680 or 56J NPO
C14,15,16,17 680pF NPO marked 681
C20,21 120pF NPO marked 121
X5 22.118 MHz VCXO Crystal
X1,2,3,4 Matched 12.000 MHz ECS-120-32-1X (filter center ~ 11,997.5 Khz)
35 inches Red #26 magnet Wire
5 inches Green #26 magnet Wire
20 inches Red #30 magnet Wire

Install all the below parts in the order given.

_____C3: Install 100pF Capacitor (marked 101)

_____C6: Install 22pF or 33pF VCXO Feedback Capacitors

_____C8: Install 68pF or 56pF VCXO Feedback Capacitors

_____C14,15,16,17: Install 680pF Capacitors - establish crystal filter bandwidth

_____C20,21: Install 120pF BFO Capacitors; because of 0.1 inch lead spaing, install in the left and center holes

Wind and install all Toroid Inductors.  Wind all wires on the toroids clockwise.


_____T1: Install RF Bandpass Transformer.

   Cut 13" of #26 red wire and tightly wind 21 turns on T1, a Red T37-2 toroid.
   Cut 5" of #26 green wire and wind 3 turns. (pix shows 4 turns)
   Trim the #26 red wires to one inch.
   Trim the #26 green wires to one half inch.

   Tin/solder the wire ends to the base of the toroid using a hot solder pencil.
   Spread the turns over most of the toroid.
   Install T1 with the #26 Red wires into the outside (upper and lower) holes on the PCB.
   and the 3 turns #26 Green wire thru the center holes for T1. (pix shows 4 turns)
   Pull the wires tight on the bottom of the PCB and solder, then trim.
   You should be able to straighten the toroid to match the outline on the PCB.

_____L1: Install Series tuned Inductor

   Cut 12" of #26 red wire and tightly wind 20 turns on L1, a black FT37-61 toroid
   Trim the #26 red wire to one half inch.
   Tin/solder the wire ends to the base of the toroid using a hot solder pencil.
   Spread the turns over most of the toroid.
   Install L1 on the PCB
   Pull the wires tight on the bottom of the PCB and solder, then trim.
   You should be able to straighten the toroid to match the outline on the PCB.

_____L2: Install Series Tuned VCXO Inductor (use holes A & C) DO NOT INSTALL IF USING A DDS

   Cut 19" of #28 red wire and tightly wind 34 turns on L2, a red T37-2 toroid
   Trim the #28 red wire to one half inch.
   Tin/solder the wire ends to the base of the toroid using a hot solder pencil.
   Spread the turns over most of the toroid.
   Install L2 on the PCB
   Pull the wires tight on the bottom of the PCB and solder, then trim.
   You should be able to straighten the toroid to match the outline on the PCB.

_____L3: Install Series Tuned BFO Inductor

   Cut 9" of #26 red wire and tightly wind 13 turns on L3, a black FT37-61 toroid
   Trim the #26 red wire to one half inch.
   Tin/solder the wire ends to the base of the toroid using a hot solder pencil.
   Spread the turns over most of the toroid.
   Install L3 on the PCB
   Pull the wires tight on the bottom of the PCB and solder, then trim.
   You should be able to straighten the toroid to match the outline on the PCB.

_____X5: Install 22.118 MHz VCXO Crystal

_____X1,2,3,4: Install 12.000 MHz IF Crystals