This is a very early version of the famous Leak Point One preamplifier which has 2 New Old Stock EF40 valves that I bought for it as the first part of getting it ready for use. Most of these preamps use the EF86 valves and a the only circuits available show these. I am therefore assuming that it's an early version. It may just be an alternative valve as the EF86 is just an EF 40 with a 9 pin base. I have to downsize so here it is for sale.
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