Sylvania JAN CRC-6SN7W tall-bottle military tubes made for the Navy. All have Navy anchors. Very rare. These tall bottle tubes were made right after the famous metal base Sylvanias and before the short bottle 6SN7W. They sound much better than the short bottle versions.Matched pairs shipped in white or vintage boxes (see listings). All have black T-shaped plates, support posts and test near NOS or below. Some show signs of use (see photos). See listings for test results. The sonics of each pair were tested in my preamp and amp. These Sylvanias have a very full, rich, dramatic, holographic and powerful sound. Deep bass. To my ears and in my system, they sound very 3 dimensional and holographic with lots of detail and slam. Almost as holographic as the Sylvania 6SN7W metal-base tubes (see me other listing for these). Most forum posts list these same qualities. “The Syl 6SN7W tall bottles - both metal and black base - throw a huge soundscape with lots of heft and slam.” –Len These tubes can be noisy in some preamps. The tubes in this listing have been tested for noise in my preamp. All sounded very quiet. Tubes were tested on my Hickok 600A gm tester. Measurements are in micromhos. Average new 6SN7 tubes test around 2600 gm. I cannot guarantee that these tubes will test the same on your tester as on mine. My tubes have a money back guarantee. If a tube arrives DOA, I will pay return shipping for a refund. Buyer pays return shipping for all other reasons. Please order by pair number. Questions are welcome. Free Priority shipping in the continental US. Canadian customers please email for shipping costs. Pair #1: $525.00. Tight match. Test near NOS and very strong. 2400/2500 and 2300/2500. Both JAN CRC-6SN7W military tubes with tight bases, black T plates, and support rods. Military boxes in excellent condition for their age (see photos). Both tubes have clear lettering. Full chrome dome getting. Matching codes: B5, B5. Pair #2: $275.00. Matched. 1800/2150 and 2100/2000 Both JAN CRC-6SN7W military tubes with tight bases, black T plates, and support rods. Both have clear lettering, one has faint lettering on top of the tube. One tube has a hairline crack in the base that does not affect sound. (See left tube in photo.) Full chrome dome getting. Come in white boxes. Matching codes: B5, B5.
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