Kraftwerk kit is identical but larger cap bank and dual tracking feature
AC/DC & Powerstation Build Thread Link
http://www.jlmaudio.com/forum/viewtopic.php?f=2&t=111
NEW KRAFTWERK 5 rail super power supply kit powers up to 2 x 11 way 500 racks or 2 x 51X racks loaded with 11 x 500 & 11 x 51X Modules. Kraftwerk has tracking and auto shutdown for each +/-V1 & +/-V2 pair of power rails. So +/- rails power up and shutdown together minimizing thumps and pops in any audio equipment it is powering. Also if a fault over currents and shuts down a power rail the other power rail will shut down in sync protecting expensive DOA and DIP8 opamps from internal latch up which can kill opamps. Uses silicon tubes on regs and 4 x 5mm bolts to locate PCB and hold the regs firm to the heatsink. So no white bush and hole burr cutting silicon pad problems. Can be quick released from heatsink in seconds for any maintenance. Fits on back or front or inside 2 rack unit high cases. Kraftwerk kit is PCB + all PCB parts. Heatsink is optional extra.
KRAFTWERK PCB is ROHS GOLD HASL PLATED with thick copper. Measuring 121mm (4.76") x 59.5mm (2.34")
Features
5 power rails. (3 positive and 2 negative @ 1.5Amp each)
26400uF (13200uF per +/-rail) Super smoothing cap bank.
+/-V1 & +/-V2 tracking. (eg the +/-V1 & +/-V2 power rails will track each other while powering up or down within +/-0.3v stopping most thumps and pops)
+/-V1 & +/-V2 auto shutdown. (eg if the +16v goes into protect and shuts down it will put down the -16v automatically as well and vica versa)
KRAFTWERK PCB is ROHS GOLD HASL PLATED with thick copper.
KRAFTWERK PCB measuring a tiny 121mm (4.76") x 59.5mm (2.34")
Kraftwerk Parts List here
Kraftwerk Schematic here
Build Tips
1. Kraftwerk kit builds just like our normal PowerStation kit from lowest height component to highest with the exception of the regulators mounting under the PCB with silicon tube covers.
2. When setting voltages with trimpots on +/-V1 and +/-V2 the 2 computer jumpers V1 & V2 should be fitted to disable the tracking feature. Remove jumpers when finished to activate tracking.
3. Also for most high current work I recommend remote mounting the bridge rectifier away from the PCB on a metal chassis or heatsink as it is by far the hottest component on the PCB.
(If mounting bridge rectifier on the PCB mount it high up leaving as much lead length as possible as this acts as extra heatsinking. Like shown in the photos on this page)
4. If adding the +V1 to +V2 to make 3A power rail set both rails to the same voltage and mix the 2 rails together with 2 x 0.22R 5W resistors. Same works for the 2 negative rails.
5. I recommend as well as correct mains fuse before the primary of the power transformer to also use 2 x 3Amp Slow blow fuses inline with secondary of the power transformer and each AC in.
Kraftwerk can be configured for below and many other combinations.
500 series only to provide +16vdc @ 3Amp / -16vdc @ 3Amp and +48vdc @ 400mA using a 2 x 18vac 160VA to 225VA.
2 x 11 way 500 racks
Transformer to use
RS Components 671-9157 160VA (115/230vac) $47AUD
RS Components 671-9016 160VA (230vac only) $46AUD
500/51X series to provide +16vdc @ 1.5Amp / -16vdc @ 1.5Amp and +24vdc @ 1.5Amp / -24vdc @ 1.5Amp and +48vdc @ 400mA using a 2 x 22vac 225VA to 300VA.
2 x 11 way 51X racks half load with 500 and half loaded with 51X modules.
Transformer to use
RS Components 671-9173 225VA (115/230vac) $56AUD
RS Components 671-9047 225VA (230vac only) $55AUD
51X series to provide +24vdc @ 3Amp / -24vdc @ 3Amp and +48vdc @ 400mA using a 2 x 22vac 225VA to 300VA.
2 x 11 way 51X with 51X +/-24v modules only
Transformer to use
RS Components 671-9173 225VA (115/230vac) $56AUD
RS Components 671-9047 225VA (230vac only) $55AUD
1 x 11 way 500 rack +/-16v @ 1.5A 80VA 2 x 18vac toroid.
RS Components 671-9139 120VA (115/230vac) $37AUD
RS Components 671-9003 120VA (230vac only) $36AUD
1 x 11 way 51X rack +/-16v & +/-24v @ combined total 1.5A = 120VA 2 x 22vac to 2 x 25vac toroid.
RS Components 671-9148 120VA (115/230vac) $37AUD
RS Components 671-9006 120VA (230vac only) $36AUD
Optional Kraftwerk Heatsink is 150mm wide x 75mm high x 38mm deep. Made to fit on back, front or inside 2 unit high rack cases.
If NOT using the negative rails the below parts can be left off the Kraftwerk PCB
Q1, Q2 - BC546
Q3, Q4 - BC556
REG4, REG5 - LM337
D15, D16, D17, D18 - 1N4007
C6A, C6B, C6C, C6D - 3300uF 35v
C13, C14, C15, C16 - 10uF 63v
R9, R11 - 5k trim pot
R10, R11 – 120R
R17, R18, R19, R20 - 1k5
V1, V2 - JUMPER Headers