RCA 6sn7 VT-231 tubes, matched pairs, wartime manufacture, military tubes some in original boxes. Smoked grey glass. All test NOS and very strong. Some show signs of use (see descriptions). Tubes without military boxes are shipped with plain white boxes. See listing for test results and date of manufacture. The sonics of each pair were tested in my preamp. Deep bass, rich midrange, smooth highs, large sound stage.Tubes were tested on my Weston 981 gm tester. Measurements are in micromhos. The MINIMUM GOOD reading for a 6SN7 VT-231 tube on my tester is 840. NOS 6SN7 VT-231 tubes test 1600 and over. I cannot guarantee that these tubes will test the same on your tester as on mine. If a tube arrives DOA, I will pay return shipping for a refund. Please order by pair number. SOLD Pair #1: $90.00. Test 1800/1750 (NOS, no signs of use) and 1800/1750 (some signs of use). Both JAN CRC-6SN7 VT-231. 1944 JAN/FEB and MAY/JUNE. Tube #1 base is slightly loose. Does not affect use or sound. Red paint around top edge of base. SOLD Pair #2: $110.00 Test 1850/1900 (NOS, no signs of use) and 1850/1850 (NOS, no signs of use). Both JAN CRC-6SN7 VT-231. 1944 SEPT/OCT, 1945 JAN/FEB. SOLD Pair #3: $150.00. Perfect match. Test 1900/1900 (NOS, no signs of use) and 1900/1900 (NOS, no signs of use). Both JAN CRC-6SN7 VT-231. Same production year 1944 MAY/JUNE and SEPT/OCT. SOLD Pair #4: $130.00. One in military box (excellent condition), one in vintage box (good condition). Test 1700/1750 (NOS, no signs of use), 1800/1750 (NOS, no signs of use). Both JAN CRC-6SN7 VT-231. Same production year and months 1944 JAN/FEB. Date on military box matches production date on tube. SOLD Pair #5: $140.00. One in military box (excellent condition), one in generic white box. Test 1900/2000 (NOS, no signs of use), 1900/2000 (NOS, no signs of use). Both JAN CRC-6SN7 VT-231. 1945 APR/MAY, 1944 JAN/FEB. Date on military box matches production date on tube. (Please email me for pictures.) All questions welcome. Priced by the pair. This price includes Priority Mail shipping in continental US and PayPal fees if any. I also accept certified check or USPS money order. I will pack securely and ship promptly.
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