I'm interested you found it lacking in scale..........for me its strengths are vocal articulation and dynamics and scale. The dynamics on a dynamic track are staggering. All compared to a modded Pre 3 /modded CF, not the best Phil can muster! But also using the Mundorfs as input caps which I think contribute quite a lot. In a way, it combines the best of CF and Pre3 for me, all coming from an inky black background.
David
I tried ACF with 811a late morning, and it sounded very good. Mind you 811a is quite sensitive so not much travel on the volume pot needed.
But, this has thrown up a hum problem.
With volume pot (Tocos) full off no hum. With volume pot just off minimum a bit of hum, which gets louder up to half way then diminishes up to full volume.
A grounding problem I assume ?
And because it was such a nice day (and wet/cooler from tomorrow onwards) I went out on the Triumph this afternoon. Bugger the hi-fi.
The only thing necessary for the triumph of evil is for good men to do nothing.
I'm going to butt in and say I've never found the Mundorf silver-oils all that convincing. They are still after all a metallised cap and lack body and tone in the bass and mids to my ears , vs. all the true film/foil caps. The treble detail and refinement is however excellent .
I would encourage anyone who hasn't tried, to buy at least one pair of the Mundorf 'ZN' which are the updated version of the old Audyn KP-SN . The newer, lead-free tinfoil ZN's are quite a lot better than the KP-SN, match or nearly match the Silver/Oils in the treble but are superior lower down .
They are also a lot cheaper than the Silver/Oils .
I havn't tried those Mundorfs but jan did and he was not that convinced. I will look at your thread tho.
Phillip, I used 0.1ufs. But as you are doing a scratch build and seemingly have a few txs around, why don't you try the Aikido with the centre tap tx circuit which means you can normally run into valve amps with no input or output caps. The signal out is effectively at the mid point i.e 0v. The circuit is up on his site. I didn't go for that version as it was not up there for a no gain or CF version.
David
I tend to agree with Mark and Ali about the Mundorf silver oils, a bit too "smooth" for me, smooth in a kind of unexciting way. They might work well in the right situation though. I intend to give them another go in the GM70 amp when I eventually get around to it.
As it's supposed to be wet tomorrow I have put ACF on the operating table and scheduled a Friday AM session.
I might have identified the source of hum (I hope) so that can be dealt with and I've found two 0.1uf (100nf) Clarity caps for the input. Got to be worth a try.
Another question David, what size output cap did you use ?
The only thing necessary for the triumph of evil is for good men to do nothing.