Hi,
I am the guy who bought Grant's (TVAD4) Moscode 401HR. Really love the amp. I just rolled in some Mullard Balckburn 12AU7s in the outside positions (per recommendations by owners on this site) and they sound really nice. The stock Sovtek 6H30 tubes were very dynamic but a little edgy on some material.
I was wondering if anyone has tried the NOS 6H30p-DH tubes? I have heard they sound quite a bit better than the Sovteks.
Any info would be appreciated.
Thanks
Tom