Using Tube Rectifiers

My first caution is that LOTS of power supplies have had various mods done over the years. Carefully examine yours to see if this portion of the circuit matches the original schematic. If you are concerned about installing the kit, you can return it for a refund.

UNPLUG the AC LINE CORD!!!!!!!!!!!!!!!!!!!!!

I suggest looking at the original schematic rather than the kit schematic. Nearly all of the wiring is in place, unless you have stripped it out.

Label the HV (tube V1) filament winding as Yellow-A (goes to V1-2) and

Yellow-B (goes to V1-8)

Label the LV (tube V2) filament winding as Slate-A (goes to V2-2) and

Slate-B (goes to V2-8)

Unplug V1 and get the LV working first.

LV PS

1) Leave all wiring connected to V2 (5U4) – including the lead from L2

2) Connect the other lead from L2 to PCB P7A2 (which is located near CR10 cathode)

3) Diodes CR7-10 are NOT installed. There are no connections to LV AC pads.

4) LV DC to the radio is taken from Low DC P9.

5) Verify proper operation of the LV before proceeding.

UNPLUG the AC LINE CORD!!!!!!!!!!!!!!!!!!!!!

Wait for capacitors to discharge.

HV PS

1) Leave all wiring connected to V1 (5R4) except remove C1 lead from V1-8

2) Connect a new wire from V1-8 to PCB CR3 cathode (end with the stripes)

3) Connect the leads from L1 to PCB pads as indicated by label L1 (P4)

4) Diodes CR1-6 are NOT installed. There are no connections to HV AC pads.

5) HV DC to the radio is taken from HV DC + (P5). Note the + and Gnd notations.

Reinstall V1 and check for proper operation.

-- Barry WØIY https://sites.google.com/site/radiofarmprojects/ for info on ALL projects