Mikibis

Hi, Myles.. finally can i write to you on this forum...i found a tube...on which was labeled Philips Miniwatt ecc83....i found it in an old valve television.... could i try it in my amps.? is a regular 12ax7... and why is called miniwatt?...thanks..any suggestion..should i try it in V1...what about this tube...is better to try in my rectoverb or in my jubilee thanks Michele