Two, new in box, Raytheon 6SN7WGT tubes. These tubes were designed for military applications and sometimes were sold into the commercial market, such as this pair. Opposing, black, flat plates, brown micanol bases, rectangular getter, top silvering. Outstanding sonics. The 6SN7WGT is a ruggedized 6SN7GT tube and can be used in all applications calling for the 6SN7GT. Tested on a Hickok TV-3 military tester that has been calibrated. Firm bases, excellent silvering. Tubes are matched for dynamic gain and structure, testing at 3375-3250 and 3375-3250 where pass/fail is 1625 micromho. The have the same structure inside and out, having matching date codes of "012", the 12th week of 1960- and in this case, US made, headed for export. 

Many other lots of tubes for sale this week.

Shipping is free within the continental US. Elsewhere- exact postage only, no packing fee.