KT88 stereo amp - UK Vintage Radio Repair and Restoration Discussion Forum

TimS · 11th Mar 2007, 11:20 pm

I've just been given two GEC KT88s. Does anyone have a schematic for a basic KT88 based class A amplifier to run off a phono input?

I got at the same time two 6EW6's (pentode), two 6AW8A's (triode-pentode) and two 6146B's (pentode). Optimistically if I could build a whole amplifier from freebie valves I would at the very least be quite smug

.

-- Tim.

Ed_Dinning · 12th Mar 2007, 6:51 pm

Hi Tim, If you PM me your address I'll send a copy of the GEC app note on a KT88 amp. The expensive bit is likely to be the o/p transformer, but it should sound very good.

Ed

yestertech · 13th Mar 2007, 11:48 am

Ed, my thoughts exactly ! Looking at some of the new components currenlty available, I fear that the cost saved on the valves will be the least of Tim's worries !!

11th Mar 2007, 11:20 pm	#1
TimS Pentode Join Date: Jun 2005 Location: Forres, Moray, UK. Posts: 194	KT88 stereo amp I've just been given two GEC KT88s. Does anyone have a schematic for a basic KT88 based class A amplifier to run off a phono input? I got at the same time two 6EW6's (pentode), two 6AW8A's (triode-pentode) and two 6146B's (pentode). Optimistically if I could build a whole amplifier from freebie valves I would at the very least be quite smug . -- Tim.

12th Mar 2007, 6:51 pm	#2
Ed_Dinning Dekatron Join Date: Jan 2004 Location: Newcastle upon Tyne, Tyne & Wear, UK. Posts: 8,194	Re: KT88 stereo amp Hi Tim, If you PM me your address I'll send a copy of the GEC app note on a KT88 amp. The expensive bit is likely to be the o/p transformer, but it should sound very good. Ed

13th Mar 2007, 11:48 am	#3
yestertech Nonode Join Date: Dec 2002 Location: Coulsdon, Surrey, UK. Posts: 2,130	Re: KT88 stereo amp Ed, my thoughts exactly ! Looking at some of the new components currenlty available, I fear that the cost saved on the valves will be the least of Tim's worries !!