29-10-2015, 09:37 AM
According to my 'Radio Valve Data' book, there are quite a few early pentodes in the same boat !
e.g. Mullard VP4 and MOV MSP4 were available with either a B5 or B7 base.
I've seen some valves with a B4 base that even had an extra connection on the side of the base !
Certainly worth watching out for if you need to buy replacements.
Andy
e.g. Mullard VP4 and MOV MSP4 were available with either a B5 or B7 base.
I've seen some valves with a B4 base that even had an extra connection on the side of the base !
Certainly worth watching out for if you need to buy replacements.
Andy
