[HAM] Best 12AU7 - now 6550

[mike p]

<<  Ok..what about the 6550's? any difference in these?>

Certainly ,  my money is on the newly produced Tung-sol 6550's .  Best bang 
for your buck .  Russian made

For older tubes either NOS or good tested used,  still the Tung-sol  50's 
and 60's  Originals  USA made.............

Mike P