Power supplies:

I haven’t modded the phono board. It’s simply an NVA board built into an integrated amp.

I think we can now call this project finished. I tried three power supplies to the boards but it was more trouble than it was worth. However I decided to keep the three supplies and instead, feed the built in NVA Phono1 board with the supply fed by the toroid mounted vertically on the back panel. IM...

Really pleased with this now. Lovely relaxed, detailed and dynamic presentation and even better now I have my Musical Fidelity M1 DAC in circuit. The M1 always sounded a bit hi-fi and soulless with my valve amps and the earlier versions of this amp too. However, now the NVA clone (still not sure wha...

Revised power supply voltages:

New 300VA, 25-0-25V toroid at bottom right: IMG_0201.jpeg Whilst I was at it, I removed the crap quality shielded input cables going to the selector and replaced them with simple straight wires. I find loads of these blue/yellow twisted pairs lying around next to BT street cabinets when I’m out walk...

Anyway, what has been bugging me for a while with this amp is that the output stage has a higher voltage transformer than the input/driver stage, which I’ve realised is a bit pointless as this isn’t a valve amp. The output stage (current amp) can only produce as much current as the swing of the driv...

CN211276 wrote: ↑Fri May 19, 2023 11:32 am Status Quo - Down the dustpipe

Did your pickup stand the test.

Glad to have helped.