Bob - There are some 10-12 with 9AE basing. All seem to work OK. Try it, can't hurt... 73 John W7ZFB > My tube substitute guide shows 6GH8A's as a preferred substitute for 6EA8 > and 6U8. Anyone tried the 6GH8A? > Regards, > Bob Mattson...W2AMI WN2AMI 1962