600???

DIY Audio Home

voltage selector / input board for multi-tap power transformers

I designed this board originally for the R120 "Luxuriante" amp600彩好的, and I'm finally after 3 years getting around to posting the details for it.  Here it is in use:

 

The PCB has switches to let you select the many voltage options on transformers like the Hammond 300 series600彩好的.  It also has inrush limiters and MOVs on it. 

600彩好的it's designed to mount to the same holes that mount the transformer to the chassis.  you use a screw through the transformer and chassis, and instead of putting a nut on the back, you put a threaded female standoff there, and screw the pcb to that.  or if you prefer, you can just use longer screws and through hole spacers.  there are several different holes to allow mounting to different size transformers.

here's the schematic:

Download it in PDF

here's the bare pcb:

...and dimensions:

The parts list is simple, available from Mouser:

Qty Parts Mfg Mfg PN Mouser PN Notes
2 TS1, TS3 Phoenix Contact 1869237
1 TS5 Phoenix Contact 1729144
1 TH1 Epcos/TDK B57237S100M 871-B57237S100M
1 S3 C&K L202121MS02QE 611-L202121MS02QE Either Q or QE is OK
2 S1, S2 C&K L203011MS02Q 611-L203011MS02Q Either Q or QE is OK
2 Z1, Z2 Littlefuse V130LA10CP 576-V130LA10CP

The PCBs are available in my eBay store...

2?????????? 2?????????? 2?????1??????? 2????????? 2????????? 2???????? 2????? 2????10????? 2?????1??????? 2???????????