Re: 7199 and 7408 tubes...is anyone familer with these??

12/2/1998 10:49 AM

Steve M.

Re: 7199 and 7408 tubes...is anyone familer with these?? Trace     > Are the 7199's the same pinout as the   > 12AX7's? I'll just re-wire the sockets   > instead of playing "Spin-the-tube" and   > praying that I'll get a sweet sounding 7199.   > Talk with yah soon!!     The 7199 is a small signal pentode and triode in the same envelope, it is very different from a 12AX7, which is two similar triodes in the same envelope. To use a 7199 in place of a 12AX7 you'd have to rewire the circuit. Unfortunately, there is no direct replacement for a 7199, althought there are several similar tubes with different pin outs, e.g. 6U8, 6BL8, 6GH8 among others.     I got a replacement board for my Dyna ST-70 that uses 6GH8s as they are cheaper and readily available, unlike the 7199.     Also, I've heard it said that the Sovtek 7199 isn't a real 7199, it is a rebased 6BL8.     Hope this helps,     Steve