Have done quite a lot of work on my NVA Phono1 over this last week.
Basically it has been turned into a two box Phono, with a large power supply fed by a 300VA toroidal transformer in one box, leaving just the phono board and the regulator board in the black box.
The mains switch, mains transformer, mains cable, rectifier and caps were removed from the black box and a big transformer, and rectifier, feeding 13600uF of smoothing per rail was installed in a Maplins plastic clamshell enclosure. The 45V, 0 -45V DC power left the clamshell box via an XLR socket, and connected to the NVA box via an XLR at the other end. Results were really rather good, so that I’ve been playing vinyl all week, with digital notable by its absence.
Final mod this evening was to fit a mono switch, to sum the channels at the Phono1 input sockets, when playing old 1950s/1960s mono records, of which I have quite a few. The difference with mono records played with summed channels vs mono played with stereo channels was well worth the five minutes spent fitting and wiring in the switch.
It made this sort of difference:
Mono-ing the first two Beatles albums on the 2009 digital remaster LPs resulted in a far more natural presentation than the hard left/right music in one channel, voices in the other ‘stereo’ of the originals. OK, so even when mono’ed these might not be the proper mono mixes, but it is still, for me infinitely preferable to the silly left/right presentation on the Please Please Me and With The Beatles LPs.
So a good week with analogue.
Before anything can be improved, it needs to be measured first.