The Blackburn Plant 5AR4/GZ34/CV1377(especially 1958-62, F31 series) = #1(ie: http://cgi.ebay.com/LOOK-NOS-NIB-f31-Fat-Base-Mullard-GZ34-5AR4-/360331594538?pt=LH_DefaultDomain_0&hash=item53e56fcb2a)
Are All Mullards Created Equal?
I want to upgrade the rectifier tube in a CARY SLP-05. Began a search for Mullard 5AR4, which a majority of you on the site agree are preferable. Is a Mullard a Mullard regardless of who they were built for, manufacturer codes, base color, fat base, metal base, etc, etc? help...