Hello folks,

For people looking for a compact solution for crc psu using LT4320, here is a proposal...

The pcb below can be used for dual secondary as well as CT transformers.

1. in case of dual secondary, one could substitute the SIP rectifiers (B1 AND B2) (of the type https://www.vishay.com/docs/84807/pb3506.pdf ) with my SMD LT4320 rectifier pcbs. (B3 and its snubbers unpopulated).

2. In case of CT trafo use, you could use the vishay sip rectifier with a heatsink similar to this ATS-PCB1061 Advanced Thermal Solutions Inc. | Fans, Thermal Management | DigiKey . Just cut off the support pins i not necessary.

I am posting a few 3D as well as sch, stuffing guide and gerbers for convenience here again (already posted in apex 100w amp thread but i guess its like finding needle in haystack)

Now the resistors can be 2 of bpr56 /58 -5W each side or 6 of 6mm dia max. axial resistors of 23mm pitch populated from bottom side.

I have tried to explain the use of psu in sch in a detailed manner, do have a careful look. The caps can be 35mm dia max with 10mm pitch-2pin OR 22.5mm pitch-4pin.

regards

prasi