Be careful with the 7308s in the LS5mkI/II. I tried the
Amperex 7308 gold pins in my LS5mkII and they rang like a
bell. And these were brand new NOS hand-selected low
noise/microphonic from Kevin Deal. Nothing at all wrong
with the tubes. There's some sort of plate current
incompatibilty going on there. I would stick with 6922s
for your LS5mkI/II to be safe.
But don't be so quick to dismiss the Sovtek 6922. I've used
a lot of different 6922s in my LS5mkII. The Sovteks are
quite good. Another decent less-expensive NOS 6922 is the
JAN Philips.
Amperex 7308 gold pins in my LS5mkII and they rang like a
bell. And these were brand new NOS hand-selected low
noise/microphonic from Kevin Deal. Nothing at all wrong
with the tubes. There's some sort of plate current
incompatibilty going on there. I would stick with 6922s
for your LS5mkI/II to be safe.
But don't be so quick to dismiss the Sovtek 6922. I've used
a lot of different 6922s in my LS5mkII. The Sovteks are
quite good. Another decent less-expensive NOS 6922 is the
JAN Philips.