JJ ECC83S Gold Pin
The JJ ECC83S (12AX7) is a robust and reliable tube with gold plated pins. The internals of this tube are manufactured to tighter tolerances than the regular JJ ECC83S. This makes the sonics of this tube clearer, better and more refined than the regular JJ ECC83S.
The design of this tube is based on the Tesla ECC83 which in turn is based on the Telefunken ECC803.