As requested by @GroovySauce I will list the components that I bought to make the Coleman power supplies.
Chassis - Kesper bamboo box from amazon.
Transformer - 300VA 2 x 12Vac from ebay
Power Supply caps - Mundorf MLytic 22000uf @ 40V
Power Supply resistors - Mundorf Mresist 10W
I used speaker binding posts for the +/- outlets which were pure copper from ebay
The heatsinks were made from 2mm (150 x 100 mm) copper plate and a 10mm aluminium block (50 x 100 mm)
I made the power cord captive (no IEC socket) and connected everything up using ceramic terminal blocks bought locally. I also incorporated a slow blow 5 amp fuse before the transformer as recommended.
I replaced the electrolytic caps supplied for the regulator with AN Kasai 50uf @ 63v and most of the resistors with Takman non magnetic carbons. There are a few that Rod says need to be as supplied.
One important thing when building these is that you can hear everything, especially the orientation of the power transformer. There is one orientation or the AC inputs and AC outputs that sounds optimal.
Chassis - Kesper bamboo box from amazon.
Transformer - 300VA 2 x 12Vac from ebay
Power Supply caps - Mundorf MLytic 22000uf @ 40V
Power Supply resistors - Mundorf Mresist 10W
I used speaker binding posts for the +/- outlets which were pure copper from ebay
The heatsinks were made from 2mm (150 x 100 mm) copper plate and a 10mm aluminium block (50 x 100 mm)
I made the power cord captive (no IEC socket) and connected everything up using ceramic terminal blocks bought locally. I also incorporated a slow blow 5 amp fuse before the transformer as recommended.
I replaced the electrolytic caps supplied for the regulator with AN Kasai 50uf @ 63v and most of the resistors with Takman non magnetic carbons. There are a few that Rod says need to be as supplied.
One important thing when building these is that you can hear everything, especially the orientation of the power transformer. There is one orientation or the AC inputs and AC outputs that sounds optimal.
