"ed" <princo at erols.com> sed > I think the acorn tube was used in the RF stage, but I could be wrong Took out TBS book & right u are 956 out to 6D6 "1st det. in." 6D6 gets LO fm 6F8G & 6J5G xtal chain. Whoda ever guessed u cud use a 6D6 as a mixer fm 60 to 80? Marty