I see some Westinghouse, CBS, & Ratheon tubes here & there for sale but know nothing about them. Never had any to try out. So, I am currious about who
exactly made these tubes & what kind of tone they have, say a 12AX7 CBS, Westinghouse, or Ratheon compared to a GE, RCA, Telefunken, Philips, or Mullard
which I am familiar with. I Know Westinghouse made thier own tubes but not sure about CBS or Ratheon.
