UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

mastermanx2001 · 16th Jan 2008, 10:22 pm

Soory about this, but I just remembered that about 25 years ago someone gave me four new General electric 5851A valves. The boxes are marked 7781A/KT66. I have just found them (see photo). Would these do the trick of lowering the heater current? and perhaps they would not lower the output as the 6L6 would. If this is the case these would seem to be the ideal valves to use. Can someone tell me?. Regards, Paul

16th Jan 2008, 10:22 pm	#5
mastermanx2001 Retired Dormant Member Join Date: Jun 2007 Location: London, UK. Posts: 366	Re: Quad 2 Valve power amp questions Soory about this, but I just remembered that about 25 years ago someone gave me four new General electric 5851A valves. The boxes are marked 7781A/KT66. I have just found them (see photo). Would these do the trick of lowering the heater current? and perhaps they would not lower the output as the 6L6 would. If this is the case these would seem to be the ideal valves to use. Can someone tell me?. Regards, Paul Attached Thumbnails