Hi guys, I need a recommendation for a coupling cap for a DHT valve stage. Value 0.47uF to 1uF. I have plenty of teflon FT-2 0.1uF which is my standard choice but I want something larger for a DHT valve preamp project.
So far I rigged up a quick and dirty setup where I could add caps after my existing FT-2 coupling cap. This yielded:
- no added cap. The cleanest sound, unsurprisingly
- K40Y 0.22uF, 1000V. Didn't like this one, shouty and hard tone on vocals.
- KBG-MN 4uF, 600V. Huge size, and too large a value. But very promising. Absolutely nothing I didn't like - everything smooth with nice tone. Sound was more expansive while the FT-2 is very focussed. Vocals were very natural. Piano a little more rounded, but the overall sound was very pleasant. Impossible to add to existing equipment due to the size, but possible for a new build.
So any opinions on these:
- MBGCH
- KBG-MP
- K71-4 polystyrene.
And any recommendations for good value non-Russian caps? Not boutique prices.