More chunks of aluminium...
The diodes would not seat property on the little pcb heatsinks so I had to look for another solution.
Given the surface area of the lower outer panels I used a 20x 25mm solid bar between the diodes which will be thermally bonded to the 80 x 260mm panel.
This was non routine as the design had to be adapted to suit the circumstances. I am glad it turned out this way because the heatinking is far more substantial and the recifier will be located close to the filter bank which will minimise noise emmissions.
The bar was tapped with M3 holes for the rectifier pcb and M4 to attach to the panel.
Also an image of the soft start circuit and the Mitre saw.
A soft start circuit is used to moderate the inital high surge current from the large toriodal transformer and intial charge of the filter capacitors.
It consists of the time delay for a relay that closes after about 3 seconds. The current initally passes via a thermister that has cold resistance of about 10R (ohms).
Next week we will look at installing the switches and audio connectors.
Ian