I have just tried shooting out a bunch of 6922's .. Tele CCa's, 6 DJ8 Bugle Boys, Russian 6922's, Amperex Pinched Waist (Holland) 6922 and Siemens Halske 6922 Cca.. the Siemens was better by a significant margin.
"Telefunken ECC88 RFT made, 1960's in AI M3A?
I would like to use these in my Audible Illusions M3A pre-amp. Has anyone else used them in theres?
Richard
Richard