I’m selling for a friend a set of four Gec KT66 valves.
These are Kt66 grey plates, brown bakelite bases and double halo getters, all test strong on an Avo mk4 meter.
3 matched acording to my calculation around 5% one out by 13%
For a popular example of usage speaking to Quad service about the sutibility of these in the Quad ii / ii Classic, they stated there will be no reduction of performance.
Measurements on post it notes on each valve in photos.
£375 ono ( if this price is wildly out let me know)
I’m in Manchester but willing to post at cost with insurance so probably around the £25 mark.