Hello! Naim NAC 42.0 questions…

[Pete MB&D]

I had a 62 with 6 regs in and separated the regs and signal 0v all the way back to the psu. I used 2.5mm wires for the supply cable they only just fit in a din plug.
That also made a big difference.

Pete

 

[bob smog]

I have an old Amphenol 4-pin connector set I can use on the power supply. I’ll connect the other end to a DIN.

 

[bob smog]

Later that year….

I put ”together” a dual 24 supply. I had been using a single rail lab power supply. I also made up proper DIN connectors for power input and signal out.

So far so good. I picked up a 100 VA transformer and a couple of cheap ”super reg” boards. Everything is nice and quiet. spinning some vinyl and things are sounding decent.

 

[bob smog]

Tweaking a bit. Everything sounds great with digital sources, but the phono had been tough to sort out.

Dropped the phono input cap from 470pf to 220pf. Not much diff.

Replaced the 10uf tantalum with a 10uf Nichicon Gold on the phono input. Took the unpleasant edge off the highs - Sweet!

 

[bob smog]

Even later that year…

I finally got around to putting this together semi-properly. Need to do some lead trimming and fiddle with the hardware. Sounds great!

I built up a pair of the DIY audio Jung SRs and found a cheap filter rectifier PCB. Went with 15000uf KEMET for the filters.

 

[stevec67]

Neat work. Well done on taking the screechy top end, this is a Naim trait that some seem to love. Glad you like it after your efforts. BTW what's the record deck?

 

[bob smog]

Neat work. Well done on taking the screechy top end, this is a Naim trait that some seem to love. Glad you like it after your efforts. BTW what's the record deck?

Thanks! It was a real learning experience. Still playing with phono input caps. I dropped from 220pf to 100, then to 47. Seems like I lost some of the bass, so probably going back to 100pf.

The deck is an early 60s Fairchild 412 with a Micro Sekai MA-505 arm. Here’s the back story