Parts list

C1, 2                                       : 100nF, 250VAC polypropylene  (RS 190-8539)
C3                                           : 680uF, 450V electrolytic
C4, 5, 6, 7, 8, 9, 10, 11           : 470nF, 630V polypropylene
C12, 13                                   : 1uF, 50V ceramic multilayer (RS 126-067)
C14                                         : 3.3nF, 1.6kV polypropylene
C15, 16                                   : 10nF, 250VAC polypropylene (RS 190-8472)
C17, 18, 19, 20, 21, 22           : 1000uF, 25V low ESR electrolytic (RS 105-997)
C23, 24                                   : 2200uF, 16V low ESR electrolytic (RS105-947)
C25, 26, 27, 28, 29, 30           : 100nF, 50V ceramic
C31                                         : 470nF, 50V ceramic multilayer
C32                                         : 22uF, 50V electrolytic
C33                                         : 10uF, 50V electrolytic
C34                                         : 1uF, 50V electrolytic
C35                                         : 33nF, 50V polyester
C36                                         : 4.7nF, 50V polyester
C37                                         : 330nF, 50V polyester or ceramic multilayer
C38                                         : 100uF, 10V electrolytic
D1                                           : Rectifier bridge, 1kV, 8A. GBPC810 or similiar.
D2, 4, 17                                 : Ultrafast diode, 1kV, 1A. UF4007 or similiar. Lower
                                                          voltage (down to 100V) is acceptable.
D3, 5                                       : Ultrafast diode 1kV, 3A. UF5408 or similiar.
D6, 7, 8, 9                               : Dual Schottky diode, 100V, 30A total. PBYR30100CT
                                                      or similiar. Single diode would also be suitable.
D10, 11, 12, 13, 14, 15, 16, 18  : 1N4148 switching diode
FB1, 2                                     : Amidon FB-73-801 ferrite bead, slipped over wire.
FB3..14                                   : Amidon FB-73-2401 ferrite beads, slipped six each
                                                      over the two 13.8VDC output cables.
L1                                            : Common mode choke, 8mH each winding, 6A.
                                                      I used junk box specimen. RS 288-159 is suitable.
L2:                                           : 20uH, 60A choke. 15 turns on Amidon T-157-26
                                                      toroid. Wound with ten #16 enameled wires
                                                      in parallel.
L3:                                           : 5uH (uncritical), 60A choke. 10 turns on ferrite solenoid,
                                                      10mm diameter, 50mm long. Wound with two #11
                                                      wires in parallel.
LED1                                       : Dual LED, green-red, common cathode
M1                                           : 12V 5W brushless DC fan, 120 x 120 x 25mm
NTC1, 2                                   : Inrush current limiter, 2.5R cold resistance (RS 191-2005)
P1                                             : CEE-22 male connector with integrated fuse holder
                                                      and EMI filter, 250VAC, 6A, (RS 210-291)
Q1, 2                                        : High voltage switching transistor, BUH1215 or similiar.
                                                      Must resist at least 400Vceo , and maintain a
                                                      beta of over 12 at a current level of 8A. (RS 859-874)
Q3, 4                                        : BC639-16 transistor. Must resist 100V and 0.5A.
Q5                                            : BD683 darlington transistor
R1, 5                                        : 10R, 5W low inductance preferred
R2, 6                                        : 180kR, 0.5W carbon
R3, 7, 19                                  : 1R, 1W carbon
R4, 8                                        : 2,7kR, 0.25W carbon
R9                                            : 47R, 5W low inductance preferred
R10, 11                                    : 1.8R, 2W low inductance preferred
R12                                          : 180R, 0.5W carbon
R13                                          : 3.3kR, 0.25W carbon
R14                                          : 1.5kR, 0.5W carbon
R15, 16                                    : 3.9kR, 0.25W carbon
R17, 18, 32, 33, 36, 38            : 1kR, 0.25W carbon
R20                                          : 22R, 0.5W carbon
R21, 22, 23, 24                        : 4.7kR, 0.25W carbon
R25, 27, 29                              : 22kR, 0.25W carbon
R26                                          : 4.3kR, 0.25W carbon
R28                                          : 13kR, 0.25W carbon
R30                                          : 12kR, 0.25W carbon
R31                                          : 10kR, 0.25W carbon
R34                                          : 1MR, 0.25W carbon
R35, 37                                    : 27kR, 0.25W carbon
R39                                          : 33R, 2W carbon
SW1                                         : 2-pole power switch, 250VAC, 10A
T1                                             : Primary 15 turns, secondary 2+2 turns. Wound with
                                                      copper foil and mylar sheet. Uses four Amidon
                                                      EA-77-625 ferrite E-cores (8 halves). Equivalents
                                                      include Thomson GER42x21x15A, Phillips 768E608,
                                                      TDK EE42/42/15. See text for winding instructions.
T2                                              : Secondary is 100+100 turns #36 enamel wire. Primary
                                               is one turn #15 plastic insulated cable, wound on
                                               secondary. Wound on Amidon EE24-25-B  bobbin. Uses an
                                               Amidon EA-77-250 core. Equivalents are Thomson
                                               GER25x10x6, Phillips 812E25Q, TDK EE25/19.
 T3                                         : Control winding is 26+26 turns #27 enamel wire.
                                                  Base windings are 8 turns #20 each. Collector winding
                                                  is one turn #15 plastic insulated cable. Bobbin and
                                                  core like T2. See text.
U1                                          : Pulse width modulator IC, LM3524, SG3524, UC3524 or
                                                  similiar.
U2                                          : Quad single supply operational amplifier, LM324
                                                    or similar.
U3                                          : 5V voltage reference, LM336Z-5.0 or similiar.
VR1, 2, 3                                : 1kR PCB mounted trimpot
 
 

Miscellaneous:

Printed circuit board
Two pole screw terminal for 40A
Power cable
6 ceramic insulators for the power transistors and Schottky diodes
6 M3 nylon screws and nuts
3mm and 1mm aluminum sheet, 10x10x1mm aluminum angle stock, some wire mesh,
4 rubber feet,  and assorted hardware for building the box.
A lot of enthusiasm!