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Don't see what you need? Contact us. We have many more tubes that are not yet listed. We also have new and good used tubes in most other numbers including preoctal, globe/balloon, octal, loctal, miniature, subminiature, metal, power, transmitter tubes and many more.

MDB Ventures Audio Tubes
Qty
Avail		Tube
Type 		Price
Each 		Tube
Brand 		Emission
Strength 		Mutual
Conduct
Desc
Notes
1 5U8 $5.00 RCA 140% / 120% 3800 / 2250:5900 / 4500Gm NOS (OB) red lettering
1 5U8 $5.00 RCA 140% / 130% 4100 / 2250:5800 / 4500Gm NOS (OB) red lettering
1 5U8 $5.00 RCA 140% / 110% 3900 / 2250:5000 / 4500Gm NOS (OB) red lettering
1 5U8 $5.00 RCA 140% / 110% 3700 / 2250:4900 / 4500Gm NOS (OB) red lettering
1 5U8 $5.00 RCA 130% / 120% 3000 / 2250:5400 / 4500Gm NOS (OB) red lettering
1 5U8 $5.00 RCA 110% / 120% 2800 / 2250:5500 / 4500Gm NOS (OB) white lettering
1 6AX8 $5.00 Tung-Sol 140% / 120% 3500 / 2250:5400 / 4500Gm NOS (OB) ---
1 6AX8 $5.00 Tung-Sol 140% / 140% 3800 / 2250:5800 / 4500Gm NOS (OB) ---
1 6AX8 $5.00 Tung-Sol 140% / 120% 3000 / 2250:5000 / 4500Gm NOS (OB) ---
1 6AX8 $5.00 RCA 140% / 110% 3600 / 2250:5000 / 4500Gm NOS (OB) red lettering
1 6AX8 $5.00 RCA 140% / 110% 3700 / 2250:5000 / 4500Gm NOS (OB) red lettering
1 6AX8 $5.00 RCA 140% / 110% 3500 / 2250:5000 / 4500Gm NOS (OB) red lettering
1 6AX8 $5.00 RCA 140% / 110% 3600 / 2250:5700 / 4500Gm NOS (OB) red lettering
1 6AX8 $5.00 RCA 140% / 140% 3400 / 2250:5800 / 4500Gm NOS (OB) red lettering
1 6AX8 $5.00 Sylvania 140% / 140% 3500 / 2250:7000 / 4500Gm NOS (OB) yellow lettering
1 6AX8 $5.00 Sylvania 140% / 110% 3700 / 2250:5400 / 4500Gm NOS (OB) yellow lettering
1 6AX8 $5.00 Sylvania 140% / 130% 3500 / 2250:5800 / 4500Gm NOS (OB) yellow lettering
1 6AX8 $5.00 GE 140% / 130% 4000 / 2250:7000 / 4500Gm NOS (OB) white lettering
1 6AX8 $5.00 Raytheon 140% / 130% 3600 / 2250:6500 / 4500Gm NOS (OB) (M9) ---
1 6AX8 $5.00 Raytheon 140% / 130% 3400 / 2250:6000 / 4500Gm NOS (OB) (M9) ---
1 6AX8 $1.00 Sylvania 140% / 110% 3100 / 2250:4800 / 4500Gm used (rb) yellow lettering
1 6AX8 $1.00 RCA 140% / 120% 3500 / 2250:6000 / 4500Gm used (rb) red lettering
1 6AX8 $1.00 Westinghouse 110% / 110% 2600 / 2250:5000 / 4500Gm used (rb) ---
1 6AX8 $1.00 Westinghouse 130% / 100% 2700 / 2250:4400 / 4500Gm used (rb) ---
1 6U8A / CK6678 $3.00 Raytheon 130% / 110% 3000 / 2250:5000 / 4500Gm used (rb) (M9) ---
1 6U8A / 6678 $3.00 GE 120% / 100% 2800 / 2250:4300 / 4500Gm used (rb) (M9) red lettering
1 6U8A / 6678 $3.00 GE 110% / 100% 2600 / 2250:4200 / 4500Gm used (rb) (M9) red lettering
1 6U8A / 6678 $3.00 GE 130% / 100% 2700 / 2250:4400 / 4500Gm used (rb) (M9) red lettering
1 6U8A / 6678 $3.00 GE 130% / 100% 3400 / 2250:4200 / 4500Gm used (rb) (M9) white lettering
1 6U8A / 6678 $3.00 RCA 120% / 120% 2700 / 2250:5400 / 4500Gm used (rb) (M9) red lettering
1 6U8A / 6678 $2.00 GE 140% / 90% 3000 / 2250:4500 / 4500Gm used (rb) (M9) red lettering
1 6U8A / 6678 $2.00 GE 110% / 90% 2300 / 2250:3600 / 4500Gm used (rb) (M9) red lettering
1 6U8A / 6678 $2.00 GE 120% / 90% 2800 / 2250:4000 / 4500Gm used (rb) (M9) red lettering
1 6U8A / 6678 $2.00 GE 130% / 90% 3000 / 2250:4000 / 4500Gm used (rb) (M9) red lettering
1 6U8A / 6678 $2.00 GE 140% / 90% 2800 / 2250:4800 / 4500Gm used (rb) (M9) white lettering
1 6U8A / 6678 $2.00 Sylvania 120% / 90% 2800 / 2250:4800 / 4500Gm used (rb) (M9) yellow lettering
1 6KD8 $5.00 RCA 140% / 110% 3500 / 2250:5200 / 4500Gm NOS (OB) red lettering
1 6KD8 $5.00 Zenith 130% / 120% 3700 / 2250:6500 / 4500Gm NOS (OB) ---
1 6KD8 $5.00 Zenith 140% / 110% 3500 / 2250:5700 / 4500Gm NOS (OB) ---
1 6KD8 $1.00 RCA 100% / 90% 2500 / 2250:4000 / 4500Gm used (rb) ---
1 6KD8 $1.00 Zenith 130% / 110% 2900 / 2250:5400 / 4500Gm used (rb) ---
1 6KD8 $1.00 Zenith 100% / 90% 2200 / 2250:4100 / 4500Gm used (rb) ---
1 6U8A / 6KD8 $5.00 RCA 140% / 130% 3300 / 2250:5200 / 4500Gm NOS (OB) red lettering
1 6U8A / 6KD8 $5.00 RCA 130% / 110% 3000 / 2250:4600 / 4500Gm NOS (OB) red lettering
1 6U8A / 6KD8 $5.00 RCA 140% / 110% 3500 / 2250:4800 / 4500Gm NOS (OB) red lettering
1 6U8A / 6KD8 $5.00 RCA 120% / 130% 2600 / 2250:5400 / 4500Gm NOS (OB) red lettering
1 6U8A / 6KD8 $5.00 RCA 140% / 120% 3500 / 2250:5400 / 4500Gm NOS (OB) red lettering
1 6U8A / 6KD8 $5.00 RCA 140% / 110% 3400 / 2250:5100 / 4500Gm NOS (OB) red lettering
1 6U8A / 6KD8 $5.00 RCA 140% / 120% 3300 / 2250:5500 / 4500Gm NOS (OB) red lettering
1 6U8A / 6KD8 $5.00 RCA 140% / 130% 3500 / 2250:5600 / 4500Gm NOS (OB) red lettering
1 6U8A / 6KD8 $5.00 RCA 140% / 120% 3300 / 2250:5800 / 4500Gm NOS (OB) red lettering - damaged box
1 6U8A / 6KD8 $5.00 RCA 120% / 130% 3200 / 2250:5600 / 4500Gm NOS (OB) red lettering
1 6U8A / 6KD8 $5.00 RCA 140% / 130% 3300 / 2250:6000 / 4500Gm NOS (OB) red lettering
1 6U8A / 6KD8 $5.00 RCA 140% / 140% 3600 / 2250:7000 / 4500Gm NOS (OB) red lettering
1 6U8A / 6KD8 $5.00 RCA 140% / 110% 3300 / 2250:5000 / 4500Gm NOS (OB) red lettering
1 6U8A / 6KD8 $5.00 RCA 110% / 120% 2900 / 2250:5400 / 4500Gm NOS (OB) red lettering
1 6U8A / 6KD8 $5.00 RCA 140% / 120% 3700 / 2250:5400 / 4500Gm NOS (OB) red lettering
1 6U8A / 6KD8 $5.00 RCA 140% / 110% 3500 / 2250:4800 / 4500Gm NOS (OB) red lettering
1 6U8A / 6KD8 $5.00 RCA 120% / 110% 3300 / 2250:4800 / 4500Gm NOS (OB) red lettering
1 6U8A / 6KD8 $5.00 RCA 140% / 110% 3600 / 2250:5000 / 4500Gm NOS (OB) red lettering
1 6U8A / 6KD8 $5.00 RCA 120% / 110% 3000 / 2250:5100 / 4500Gm NOS (OB) red lettering
1 6U8A / 6KD8 $5.00 RCA 130% / 130% 3300 / 2250:6250 / 4500Gm NOS (OB) red lettering
1 6U8A / 6KD8 $5.00 RCA 140% / 120% 3800 / 2250:5600 / 4500Gm NOS (OB) red lettering
1 6U8A / 6KD8 $5.00 RCA 140% / 120% 4200 / 2250:5300 / 4500Gm NOS (OB) red lettering
1 6U8A / 6KD8 $5.00 RCA 120% / 110% 2800 / 2250:4700 / 4500Gm NOS (OB) red lettering
1 6KD8 / 6U8A $1.00 Raytheon 130% / 120% 3000 / 2250:5700 / 4500Gm used (OB) ---
1 6KD8 / 6U8A $1.00 Raytheon 120% / 70% 3000 / 2250:4000 / 4500Gm used (OB) ---
1 6U8 $10.00 Tung-Sol 130% / 120% 2600 / 2250:5600 / 4500Gm NOS (wb) (M9) ---
1 6U8 $10.00 Tung-Sol 110% / 120% 2300 / 2250:5500 / 4500Gm NOS (OB) (M9) ---
1 6U8 $10.00 Amperex 125% / 115% 2500 / 2250:5400 / 4500Gm used (wb) (M9) white lettering - holland
1 6U8A / ECF82 $7.50 RCA 140% / 120% 3300 / 2250:4800 / 4500Gm NOS (OB) red lettering - Brazil
1 6U8 / ECF82 $20.00 Telefunken 115% / 100% 2500 / 2250:4600 / 4500Gm used (wb) (M9) top halo getter - diamond base
1 6U8 / ECF82 $20.00 Telefunken 100% / 110% 2300 / 2250:4800 / 4500Gm used (wb) (M9) top halo getter - diamond base
1 6U8 / ECF82 $20.00 Telefunken 100% / 100% 2350 / 2250:4400 / 4500Gm used (rb) (M9) top halo getter - diamond base
1 6U8 / ECF82 $20.00 Telefunken 115% / 100% 2500 / 2250:4500 / 4500Gm used (rb) (M9) top halo getter - diamond base
1 6U8 / ECF82 $20.00 Telefunken 105% / 140% 2700 / 2250:5000 / 4500Gm used (rb) (M9) top halo getter - diamond base
1 6U8 / ECF82 $20.00 Telefunken 110% / 100% 2800 / 2250:5000 / 4500Gm used (rb) (M9) top halo getter - diamond base
1 6U8 / ECF82 $10.00 Telefunken 90% / 100% 2200 / 2250:4200 / 4500Gm used (wb) (M9) top halo getter - diamond base
1 6U8 / ECF82 $10.00 Telefunken 90% / 130% 3200 / 2250:4000 / 4500Gm used (rb) (M9) top halo getter - diamond base
1 6U8 / ECF82 $5.00 Telefunken 80% / 90% 2500 / 2250:2800 / 4500Gm used (rb) (M9) top halo getter - diamond base
1 6U8 / ECF82 $5.00 Telefunken 60% / 80% 1300 / 2250:4400 / 4500Gm used (wb) (M9) top halo getter - diamond base
1 6U8 $10.00 Tung-Sol 120% / 110% 2800 / 2250:5200 / 4500Gm NOS (wb) (M9) US Navy
1 6U8 $10.00 Tung-Sol 130% / 110% 2500 / 2250:5400 / 4500Gm NOS (wb) (M9) ---
1 6U8 $5.00 GE 140% / 130% 2600 / 2250:6000 / 4500Gm NOS (OB) (M9) white lettering
1 6U8 $5.00 GE 140% / 110% 2700 / 2250:4900 / 4500Gm NOS (OB) (M9) white lettering
1 6U8 $5.00 Sylvania 140% / 140% 3600 / 2250:6500 / 4500Gm NOS (OB) (M9) yellow lettering
1 6U8 $5.00 Sylvania 130% / 130% 2800 / 2250:6000 / 4500Gm NOS (OB) (M9) yellow lettering
1 6U8 $5.00 Sylvania 120% / 110% 2800 / 2250:5000 / 4500Gm NOS (OB) (M9) yellow lettering
1 6U8A $10.00 Tung-Sol 140% / 110% 3000 / 2250:4800 / 4500Gm NOS (OB) (M9) US Navy - damaged box
1 6U8A $10.00 Tung-Sol 120% / 110% 2600 / 2250:5100 / 4500Gm NOS (wb) (M9) ---
1 6U8A $10.00 Tung-Sol 130% / 110% 3000 / 2250:5400 / 4500Gm NOS (wb) (M9) ---
1 6U8A $10.00 Tung-Sol 120% / 110% 2700 / 2250:5300 / 4500Gm NOS (wb) (M9) ---
1 6U8A $7.50 RCA 130% / 110% 3000 / 2250:5400 / 4500Gm NOS (OB) red lettering
1 6U8A $7.50 RCA 130% / 120% 2900 / 2250:6250 / 4500Gm NOS (OB) red lettering
1 6U8A $7.50 RCA 120% / 110% 2800 / 2250:4800 / 4500Gm NOS (OB) red lettering
1 6U8A $7.50 RCA 120% / 110% 3000 / 2250:5400 / 4500Gm NOS (OB) red lettering
1 6U8A $7.50 RCA 130% / 120% 3100 / 2250:5000 / 4500Gm NOS (OB) red lettering
1 6U8A $7.50 RCA 110% / 120% 2600 / 2250:5500 / 4500Gm NOS (OB) red lettering
1 6U8A $7.50 RCA 130% / 130% 2900 / 2250:5600 / 4500Gm NOS (OB) red lettering
1 6U8A $7.50 RCA 110% / 120% 2600 / 2250:5700 / 4500Gm NOS (OB) red lettering
1 6U8A $7.50 RCA 130% / 110% 3100 / 2250:5500 / 4500Gm NOS (OB) red lettering
1 6U8A $7.50 RCA 140% / 130% 3000 / 2250:6000 / 4500Gm NOS (OB) red lettering
1 6U8A $7.50 RCA 140% / 110% 3300 / 2250:4800 / 4500Gm NOS (OB) red lettering
1 6U8A $7.50 RCA 140% / 140% 3200 / 2250:5800 / 4500Gm NOS (OB) red lettering
1 6U8A $7.50 RCA 130% / 140% 3000 / 2250:6750 / 4500Gm NOS (OB) red lettering
1 6U8A $7.50 RCA 120% / 120% 3000 / 2250:5200 / 4500Gm NOS (OB) red lettering
1 6U8A $7.50 RCA 110% / 120% 2800 / 2250:5700 / 4500Gm NOS (OB) red lettering
1 6U8A $7.50 RCA 120% / 110% 3100 / 2250:4700 / 4500Gm NOS (OB) red lettering
1 6U8A $7.50 RCA 140% / 120% 3000 / 2250:5000 / 4500Gm NOS (OB) red lettering
1 6U8A $7.50 RCA 140% / 120% 3000 / 2250:5500 / 4500Gm NOS (OB) (M9) red lettering
1 6U8A $7.50 RCA 140% / 110% 3000 / 2250:5000 / 4500Gm NOS (OB) (M9) red lettering
1 6U8A $5.00 RCA 140% / 110% 3200 / 2250:5100 / 4500Gm NOS (OB) red lettering
1 6U8A $6.00 Sylvania 140% / 120% 3200 / 2250:4800 / 4500Gm NOS (OB) (M9) JAN - green lettering
1 6U8A $6.00 Sylvania 140% / 130% 3300 / 2250:5700 / 4500Gm NOS (wb) (M9) green lettering
1 6U8A $6.00 Sylvania 140% / 120% 3200 / 2250:5600 / 4500Gm NOS (wb) (M9) green lettering
1 6U8A $6.00 Sylvania 140% / 110% 3700 / 2250:5600 / 4500Gm NOS (wb) (M9) green lettering
1 6U8A $5.00 Sylvania 140% / 120% 3500 / 2250:6000 / 4500Gm NOS (OB) (M9) red lettering
1 6U8A $5.00 Sylvania 140% / 110% 3000 / 2250:5000 / 4500Gm NOS (OB) (M9) yellow lettering
1 6U8A $5.00 Sylvania 140% / 120% 3000 / 2250:5600 / 4500Gm NOS (OB) (M9) yellow lettering
1 6U8A $5.00 Sylvania 140% / 130% 3200 / 2250:5800 / 4500Gm NOS (OB) (M9) yellow lettering
1 6U8A $5.00 Sylvania 130% / 130% 3200 / 2250:5800 / 4500Gm NOS (OB) (M9) yellow lettering
1 6U8A $5.00 GE 140% / 130% 3200 / 2250:7000 / 4500Gm NOS (OB) (M9) green lettering - JAN
1 6U8A $5.00 GE 130% / 120% 3200 / 2250:5700 / 4500Gm NOS (OB) (M9) green lettering - JAN
1 6U8A $5.00 GE 140% / 120% 3600 / 2250:5400 / 4500Gm NOS (OB) (M9) white lettering
1 6U8A $5.00 GE 140% / 120% 3600 / 2250:5100 / 4500Gm NOS (OB) (M9) white lettering
1 6U8A $5.00 GE 140% / 120% 3300 / 2250:5500 / 4500Gm NOS (OB) (M9) white lettering
1 6U8A $5.00 GE 140% / 120% 3900 / 2250:6000 / 4500Gm NOS (OB) (M9) white lettering
1 6U8A $5.00 GE 140% / 130% 2700 / 2250:5500 / 4500Gm NOS (OB) (M9) white lettering
1 6U8A $5.00 GE 140% / 110% 3200 / 2250:4800 / 4500Gm NOS (OB) (M9) white lettering
1 6U8A $5.00 GE 140% / 110% 3200 / 2250:5000 / 4500Gm NOS (OB) (M9) white lettering
1 6U8A $5.00 GE 130% / 110% 3300 / 2250:5500 / 4500Gm NOS (OB) (M9) white lettering
1 6U8A $5.00 GE 140% / 110% 3500 / 2250:5000 / 4500Gm NOS (OB) (M9) white lettering
1 6U8A $5.00 Raytheon 130% / 140% 2900 / 2250:5500 / 4500Gm NOS (OB) (M9) ---
1 6U8A $5.00 Raytheon 140% / 110% 2900 / 2250:4700 / 4500Gm NOS (OB) (M9) ---
1 6U8A $5.00 Raytheon 140% / 110% 3000 / 2250:4700 / 4500Gm NOS (OB) (M9) ---
1 6U8A $5.00 Raytheon 140% / 110% 3000 / 2250:5000 / 4500Gm NOS (OB) (M9) ---
1 6U8A $5.00 Channel Master 120% / 130% 3000 / 2250:5400 / 4500Gm NOS (OB) (M9) ---
1 6U8A $5.00 Channel Master 120% / 110% 2600 / 2250:4800 / 4500Gm NOS (OB) (M9) ---
1 6U8A $5.00 Channel Master 140% / 110% 3200 / 2250:5200 / 4500Gm NOS (OB) (M9) ---
1 6U8A $5.00 Westinghouse 140% / 120% 3000 / 2250:5600 / 4500Gm NOS (OB) (M9) ---
1 6U8A $5.00 Westinghouse 140% / 140% 3200 / 2250:5600 / 4500Gm NOS (OB) (M9) ---
1 6U8A $5.00 Westinghouse 140% / 120% 3200 / 2250:5200 / 4500Gm NOS (OB) (M9) Canada
1 6U8A $5.00 Lindal 140% / 120% 2800 / 2250:5100 / 4500Gm NOS (OB) (M9) 1 / 2 gray coat - Japan
1 6U8A $5.00 Lindal 140% / 110% 2900 / 2250:4900 / 4500Gm NOS (OB) (M9) 1 / 2 gray coat - Japan
1 6U8A $5.00 Lindal 130% / 110% 2800 / 2250:5000 / 4500Gm NOS (OB) (M9) 1 / 2 gray coat - Japan
1 6U8A $5.00 Triad 120% / 120% 3200 / 2250:5400 / 4500Gm NOS (OB) (M9) 1 / 2 gray coat - Japan
1 6U8A $5.00 CEI 140% / 110% 3000 / 2250:5200 / 4500Gm NOS (OB) (M9) 1 / 2 gray coat - Japan
1 6U8A $5.00 Packard Bell 140% / 110% 3100 / 2250:4900 / 4500Gm NOS (OB) (M9) ---
1 6U8A $5.00 Motorola 140% / 130% 4100 / 2250:5800 / 4500Gm NOS (wb) (M9) ---
1 6U8A $5.00 Motorola 140% / 120% 3900 / 2250:5600 / 4500Gm NOS (OB) (M9) ---
1 6U8A $3.00 RCA 100% / 100% 2500 / 2250:4100 / 4500Gm used (rb) (M9) ---
1 6U8 $3.00 GE 120% / 100% 2600 / 2250:4500 / 4500Gm used (rb) (M9) ---
1 6U8 $3.00 RCA 110% / 120% 2400 / 2250:5400 / 4500Gm used (rb) (M9) ---
1 6U8 $3.00 RCA 140% / 100% 2500 / 2250:4600 / 4500Gm used (rb) (M9) white lettering
1 6U8 $3.00 Sylvania 130% / 100% 3000 / 2250:4100 / 4500Gm used (rb) (M9) green lettering
1 6U8 $3.00 Sylvania 140% / 100% 3400 / 2250:4700 / 4500Gm used (rb) (M9) green lettering
1 6U8 $3.00 Sylvania 130% / 110% 2400 / 2250:4600 / 4500Gm used (rb) (M9) green lettering
1 6U8 $3.00 Sylvania 140% / 120% 2700 / 2250:5000 / 4500Gm used (rb) (M9) yellow lettering
1 6U8 $3.00 Tung-Sol 120% / 100% 2500 / 2250:4400 / 4500Gm used (rb) (M9) ---
1 6U8 $3.00 ITT 130% / 110% 2800 / 2250:4800 / 4500Gm used (rb) (M9) ---
1 6U8 $3.00 Zenith 140% / 140% 2900 / 2250:4900 / 4500Gm used (rb) (M9) ---
1 6U8 $3.00 Motorola 140% / 100% 2800 / 2250:4400 / 4500Gm used (rb) (M9) ---
1 6U8 $3.00 Daystrom 140% / 110% 2600 / 2250:4800 / 4500Gm used (rb) (M9) ---
1 6U8 $3.00 Fisher 140% / 110% 2600 / 2250:4800 / 4500Gm used (rb) (M9) ---
1 6U8 $3.00 Tung-Sol 120% / 100% 2600 / 2250:4700 / 4500Gm used (L) (M9) ---
1 6U8 $3.00 Sylvania 140% / 130% 3200 / 2250:5800 / 4500Gm used (rb) (M9) yellow lettering
1 6U8 $2.00 Motorola 130% / 100% 2600 / 2250:4500 / 4500Gm used (rb) (M9) ---
1 6U8 $1.00 RCA 110% / 90% 2200 / 2250:4300 / 4500Gm used (rb) (M9) white lettering
1 6U8 $1.00 RCA 140% / 90% 2600 / 2250:4000 / 4500Gm used (L) (M9) white lettering
1 6U8 $1.00 Raytheon 110% / 90% 2400 / 2250:4000 / 4500Gm used (L) (M9) ---
1 6U8 $1.00 unknown 110% / 90% 2300 / 2250:4000 / 4500Gm used (L) (M9) ---
1 6U8 $1.00 unknown 100% / 110% 2200 / 2250:4800 / 4500Gm used (L) (M9) ---
1 6U8 $1.00 unknown 100% / 90% 2000 / 2250:4200 / 4500Gm used (rb) (M9) ---
1 6U8 $0.50 RCA 110% / 85% 2500 / 2250:4000 / 4500Gm used (L) (M9) white lettering
1 6U8 $0.50 RCA 130% / 85% 3000 / 2250:3900 / 4500Gm used (L) (M9) white lettering
1 6U8 $0.50 Tung-Sol 90% / 90% 2000 / 2250:4100 / 4500Gm used leaky (1M)(L) (M9) ---
1 6U8 $0.50 RCA 100% / 90% 2000 / 2250:4200 / 4500Gm used leaky (1M) (L) (M9) white lettering
1 6U8 $0.50 Westinghouse 120% / 100% 2400 / 2250:4800 / 4500Gm used leaky (1M) (L) (M9) ---
1 6U8 $0.50 Sylvania 120% / 90% 2800 / 2250:4200 / 4500Gm used leaky (1M) (rb) (M9) yellow lettering
1 6U8A $3.00 Sylvania 140% / 110% 3200 / 2250:5000 / 4500Gm used (rb) (M9) yellow lettering
1 6U8A $3.00 Sylvania 140% / 110% 3600 / 2250:4900 / 4500Gm used (rb) (M9) yellow lettering
1 6U8A $3.00 Sylvania 130% / 130% 3100 / 2250:5500 / 4500Gm used (rb) (M9) yellow lettering
1 6U8A $3.00 Sylvania 140% / 130% 3700 / 2250:7000 / 4500Gm used (rb) (M9) yellow lettering
1 6U8A $3.00 Sylvania 140% / 130% 3500 / 2250:6750 / 4500Gm used (rb) (M9) yellow lettering
1 6U8A $3.00 Sylvania 140% / 120% 3600 / 2250:5400 / 4500Gm used (rb) (M9) yellow lettering
1 6U8A $3.00 Sylvania 140% / 100% 3000 / 2250:5500 / 4500Gm used (rb) (M9) yellow lettering
1 6U8A $3.00 Sylvania 140% / 100% 3200 / 2250:4800 / 4500Gm used (rb) (M9) yellow lettering
1 6U8A $3.00 Sylvania 120% / 110% 3100 / 2250:4800 / 4500Gm used (rb) (M9) yellow lettering
1 6U8A $3.00 Sylvania 100% / 110% 2200 / 2250:4700 / 4500Gm used (rb) (M9) yellow lettering
1 6U8A $3.00 Sylvania 140% / 140% 3300 / 2250:7000 / 4500Gm used (rb) (M9) red lettering
1 6U8A $3.00 Sylvania 130% / 100% 2900 / 2250:4400 / 4500Gm used (rb) (M9) green lettering
1 6U8A $3.00 Sylvania 140% / 110% 3600 / 2250:5000 / 4500Gm used (rb) (M9) green lettering
1 6U8A $3.00 Sylvania 120% / 100% 3000 / 2250:4800 / 4500Gm used (rb) (M9) green lettering
1 6U8A $3.00 Sylvania 120% / 110% 2700 / 2250:4700 / 4500Gm used (rb) (M9) green lettering
1 6U8A $3.00 Sylvania 140% / 120% 3300 / 2250:6000 / 4500Gm used (rb) (M9) green lettering - US Navy
1 6U8A $3.00 Sylvania 130% / 120% 3200 / 2250:5400 / 4500Gm used (rb) (M9) green lettering - US Navy
1 6U8A $3.00 Sylvania 130% / 120% 3200 / 2250:5100 / 4500Gm used (rb) (M9) green lettering - JAN
1 6U8A $3.00 Sylvania 140% / 120% 3300 / 2250:5500 / 4500Gm used (rb) (M9) green lettering - JAN
1 6U8A $3.00 Philips 140% / 100% 3600 / 2250:5400 / 4500Gm used (rb) (M9) JAN
1 6U8A $3.00 RCA 130% / 100% 3000 / 2250:4800 / 4500Gm used (rb) (M9) red lettering
1 6U8A $3.00 RCA 110% / 100% 2800 / 2250:4100 / 4500Gm used (rb) (M9) red lettering
1 6U8A $3.00 RCA 130% / 120% 3200 / 2250:5000 / 4500Gm used (rb) (M9) red lettering
1 6U8A $3.00 RCA 110% / 110% 2200 / 2250:4600 / 4500Gm used (rb) (M9) red lettering
1 6U8A $3.00 RCA 140% / 100% 3700 / 2250:4600 / 4500Gm used (rb) (M9) red lettering
1 6U8A $3.00 RCA 140% / 110% 3000 / 2250:4900 / 4500Gm used (rb) (M9) red lettering
1 6U8A $3.00 RCA 120% / 100% 2500 / 2250:4200 / 4500Gm used (rb) (M9) red lettering
1 6U8A $3.00 RCA 120% / 120% 3300 / 2250:5400 / 4500Gm used (rb) (M9) red lettering
1 6U8A $3.00 RCA 110% / 110% 2800 / 2250:4800 / 4500Gm used (rb) (M9) red lettering
1 6U8A $3.00 RCA 120% / 110% 2800 / 2250:4900 / 4500Gm used (rb) (M9) red lettering
1 6U8A $3.00 RCA 120% / 110% 2800 / 2250:4700 / 4500Gm used (rb) (M9) red lettering
1 6U8A $3.00 RCA 100% / 100% 2400 / 2250:4800 / 4500Gm used (rb) (M9) red lettering
1 6U8A $3.00 RCA 120% / 110% 2100 / 2250:5000 / 4500Gm used (rb) (M9) white lettering
1 6U8A $3.00 GE 140% / 120% 3200 / 2250:5000 / 4500Gm used (rb) (M9) white lettering
1 6U8A $3.00 GE 140% / 100% 3200 / 2250:4500 / 4500Gm used (rb) (M9) white lettering
1 6U8A $3.00 GE 140% / 110% 3400 / 2250:4400 / 4500Gm used (rb) (M9) white lettering
1 6U8A $3.00 GE 140% / 100% 2900 / 2250:4400 / 4500Gm used (rb) (M9) white lettering
1 6U8A $3.00 GE 120% / 100% 2700 / 2250:4000 / 4500Gm used (rb) (M9) white lettering
1 6U8A $3.00 GE 140% / 100% 3300 / 2250:4300 / 4500Gm used (rb) (M9) red lettering
1 6U8A $3.00 GE 130% / 110% 3000 / 2250:4600 / 4500Gm used (rb) (M9) red lettering
1 6U8A $3.00 Tung-Sol 140% / 110% 3000 / 2250:5100 / 4500Gm used (rb) (M9) ---
1 6U8A $3.00 Tung-Sol 130% / 120% 3000 / 2250:5700 / 4500Gm used (rb) (M9) ---
1 6U8A $3.00 Tung-Sol 120% / 110% 2200 / 2250:5400 / 4500Gm used (rb) (M9) ---
1 6U8A $3.00 Tung-Sol 110% / 100% 2800 / 2250:4600 / 4500Gm used (rb) (M9) ---
1 6U8A $3.00 Tung-Sol 130% / 140% 2500 / 2250:7000 / 4500Gm used (rb) (M9) ---
1 6U8A $3.00 Tung-Sol 120% / 100% 2800 / 2250:4800 / 4500Gm used (rb) (M9) ---
1 6U8A $3.00 Motorola 120% / 100% 3000 / 2250:4800 / 4500Gm used (rb) (M9) ---
1 6U8A $3.00 Motorola 140% / 120% 3000 / 2250:5400 / 4500Gm used (rb) (M9) ---
1 6U8A $3.00 Motorola 100% / 120% 2000 / 2250:5000 / 4500Gm used (rb) (M9) ---
1 6U8A $3.00 Motorola 120% / 100% 2600 / 2250:4700 / 4500Gm used (rb) (M9) ---
1 6U8A $3.00 Raytheon 110% / 110% 2200 / 2250:4300 / 4500Gm used (rb) (M9) ---
1 6U8A $3.00 Raytheon 140% / 110% 3000 / 2250:4800 / 4500Gm used (rb) (M9) ---
1 6U8A $3.00 Silvertone 110% / 120% 2400 / 2250:5800 / 4500Gm used (rb) (M9) ---
1 6U8A $3.00 Silvertone 130% / 100% 3000 / 2250:4400 / 4500Gm used (rb) (M9) ---
1 6U8A $3.00 Micro 110% / 110% 2700 / 2250:4800 / 4500Gm used (rb) (M9) ---
1 6U8A $3.00 General Radio Telephone 100% / 100% 2200 / 2250:4300 / 4500Gm used (rb) (M9) made by Tung-Sol
1 6U8A $3.00 Philco 140% / 110% 3000 / 2250:5200 / 4500Gm used (rb) (M9) ---
1 6U8A $3.00 Hewlett Packard 110% / 100% 2200 / 2250:4400 / 4500Gm used (rb) (M9) made by GE
1 6U8A $3.00 Ward Airline 100% / 110% 2300 / 2250:4800 / 4500Gm used (rb) (M9) ---
1 6U8A $3.00 unknown 140% / 110% 3000 / 2250:5000 / 4500Gm used (rb) (M9) ---
1 6U8A $3.00 Sylvania 140% / 120% 2600 / 2250:5700 / 4500Gm used (L) (M9) yellow lettering
1 6U8A $3.00 Sylvania 110% / 110% 2800 / 2250:4800 / 4500Gm used (L) (M9) yellow lettering
1 6U8A $1.00 unknown 140% / 110% 3500 / 2250:5000 / 4500Gm used (L) (M9) ---
1 6U8A $1.00 Tung-Sol 90% / 90% 2200 / 2250:3800 / 4500Gm used (L) (M9) ---
1 6U8A $1.00 Tung-Sol 100% / 90% 2200 / 2250:4000 / 4500Gm used (L) (M9) ---
1 6U8A $1.00 Tung-Sol 140% / 90% 3200 / 2250:4400 / 4500Gm used (L) (M9) ---
1 6U8A $0.50 GE 140% / 90% 2800 / 2250:3900 / 4500Gm used (rb) (M9) ---
1 6U8A $0.50 GE 110% / 90% 2500 / 2250:3800 / 4500Gm used (rb) (M9) white lettering
1 6U8A $0.50 GE 130% / 90% 2800 / 2250:4500 / 4500Gm used (rb) (M9) white lettering
1 6U8A $0.50 Motorola 90% / 100% 2000 / 2250:4000 / 4500Gm used (rb) (M9) ---
1 6U8A $0.50 Motorola 100% / 90% 2500 / 2250:4000 / 4500Gm used (rb) (M9) ---
1 6U8A $0.50 Motorola 100% / 90% 2000 / 2250:4200 / 4500Gm used (rb) (M9) ---
1 6U8A $0.50 Curtis Mathis 110% / 95% 2300 / 2250:4400 / 4500Gm used (rb) (M9) ---
1 6U8A $0.50 Teonex 110% / 90% 2500 / 2250:4500 / 4500Gm used (rb) (M9) Japan
1 6U8A $0.50 Gamatron 120% / 90% 2800 / 2250:4300 / 4500Gm used (rb) (M9) made by GE
1 6U8A $0.50 Raytheon 110% / 90% 2200 / 2250:3900 / 4500Gm used (rb) (M9) ---
1 6U8A $0.50 Raytheon 140% / 90% 3000 / 2250:4600 / 4500Gm used (rb) (M9) ---
1 6U8A $0.50 CBS 100% / 90% 2100 / 2250:3800 / 4500Gm used (rb) (M9) ---
1 6U8A $0.50 RCA 120% / 90% 3000 / 2250:5000 / 4500Gm used (rb) (M9) red lettering
1 6U8A $0.50 RCA 95% / 100% 2200 / 2250:4400 / 4500Gm used (rb) (M9) red lettering
1 6U8A $0.50 RCA 90% / 110% 2100 / 2250:4800 / 4500Gm used (rb) (M9) red lettering
1 6U8A $0.50 Sylvania 140% / 90% 3400 / 2250:4200 / 4500Gm used (rb) (M9) red lettering
1 6U8A $0.50 Sylvania 100% / 90% 2500 / 2250:4200 / 4500Gm used (L) (M9) yellow lettering
1 6U8A $0.50 Sylvania 100% / 90% 2300 / 2250:3800 / 4500Gm used (L) (M9) yellow lettering
1 6U8A $0.50 GE 120% / 90% 2200 / 2250:3600 / 4500Gm used (L) (M9) white lettering
1 6U8A $0.50 Raytheon 110% / 90% 2400 / 2250:3800 / 4500Gm used (L) (M9) ---
1 6U8A $0.50 GE 110% / 85% 2600 / 2250:3600 / 4500Gm used (L) (M9) white lettering
1 6U8A $0.50 GE 100% / 85% 2700 / 2250:3800 / 4500Gm used (L) (M9) white lettering
1 6U8A $0.50 unknown 130% / 90% 2800 / 2250:3800 / 4500Gm used (L) (M9) ---
1 6U8A $0.50 unknown 100% / 90% 2200 / 2250:4200 / 4500Gm used (L) (M9) ---
1 6U8A $0.50 unknown 100% / 90% 2000 / 2250:4300 / 4500Gm used (L) (M9) ---
1 6U8A $0.50 RCA 140% / 85% 3100 / 2250:4000 / 4500Gm used leaky (2M) (L) (M9) red lettering
1 6U8A $0.50 RCA 120% / 90% 2900 / 2250:4100 / 4500Gm used leaky (1M) (L) (M9) red lettering
1 6U8A $0.50 RCA 100% / 95% 2500 / 2250:4000 / 4500Gm used leaky (1M) (L) (M9) red lettering
1 6U8A $0.50 Raytheon 140% / 110% 3100 / 2250:5000 / 4500Gm used leaky (100K) (L) (M9) ---
1 6U8A / 6KD8 $5.00 Sylvania 140% / 110% 3600 / 2250:5000 / 4500Gm NOS (OB) (M9) red lettering
1 6U8A / 6KD8 $5.00 Sylvania 140% / 110% 3400 / 2250:5000 / 4500Gm NOS (OB) (M9) red lettering
1 6U8A / 6KD8 $5.00 Sylvania 140% / 110% 3700 / 2250:5400 / 4500Gm NOS (OB) (M9) red lettering
1 6U8A / 6KD8 $5.00 Sylvania 140% / 110% 3400 / 2250:5200 / 4500Gm NOS (OB) (M9) red lettering
1 6U8A / 6KD8 $5.00 Sylvania 140% / 110% 3200 / 2250:5200 / 4500Gm NOS (OB) (M9) red lettering
1 6U8A / 6KD8 $5.00 Sylvania 140% / 110% 3600 / 2250:5200 / 4500Gm NOS (OB) (M9) red lettering
1 6U8A / 6KD8 $5.00 Sylvania 140% / 110% 3700 / 2250:5400 / 4500Gm NOS (OB) (M9) red lettering
1 6U8A / 6KD8 $5.00 Sylvania 140% / 120% 3200 / 2250:5600 / 4500Gm NOS (OB) (M9) red lettering
1 6U8A / 6KD8 $5.00 RCA 140% / 120% 3400 / 2250:5000 / 4500Gm NOS (OB) (M9) red lettering - worn box
1 6U8A / 6KD8 $5.00 Sylvania 140% / 120% 2700 / 2250:5200 / 4500Gm NOS (wb) (M9) yellow lettering
1 6U8A / 6KD8 $5.00 Zenith 140% / 110% 3500 / 2250:5200 / 4500Gm NOS (wb) (M9) ---
1 6U8A / 6KD8 $5.00 Raytheon 140% / 120% 3000 / 2250:5300 / 4500Gm NOS (OB) (M9) 1 / 2 gray coat - Japan
1 6U8A / 6KD8 $5.00 Raytheon 120% / 120% 2600 / 2250:5000 / 4500Gm NOS (OB) (M9) 1 / 2 gray coat - Japan
1 6U8A / 6KD8 $5.00 Raytheon 140% / 120% 2900 / 2250:5000 / 4500Gm NOS (OB) (M9) 1 / 2 gray coat - Japan
1 6U8A / 6KD8 $5.00 Raytheon 130% / 110% 2600 / 2250:4800 / 4500Gm NOS (OB) (M9) ---
1 6U8A / 6KD8 $5.00 Westinghouse 130% / 120% 2900 / 2250:4900 / 4500Gm NOS (OB) (M9) 1 / 2 gray coat - Japan
1 6U8A / 6KD8 $5.00 Lindal 130% / 110% 2800 / 2250:4600 / 4500Gm NOS (OB) (M9) 1 / 2 gray coat - Japan
1 6U8A / 6KD8 $5.00 Zenith 140% / 120% 3500 / 2250:5000 / 4500Gm NOS (OB) (M9) worn box
1 6U8A / 6KD8 $5.00 Realistic 130% / 120% 2900 / 2250:5400 / 4500Gm NOS (OB) (M9) Japan
1 6U8A / 6KD8 $5.00 Realistic 130% / 110% 2700 / 2250:4900 / 4500Gm NOS (OB) (M9) 1 / 2 gray coat - Japan
1 6U8A / 6KD8 $5.00 GE 140% / 110% 3400 / 2250:5400 / 4500Gm NOS (OB) (M9) white lettering
1 6U8A / 6KD8 $3.00 GE 140% / 120% 3300 / 2250:5500 / 4500Gm used (rb) (M9) white lettering
1 6U8A / 6KD8 $3.00 GE 100% / 100% 2500 / 2250:4200 / 4500Gm used (rb) (M9) white lettering
1 6U8A / 6KD8 $3.00 GE 140% / 110% 3300 / 2250:4700 / 4500Gm used (rb) (M9) white lettering
1 6U8A / 6KD8 $1.00 RCA 100% / 95% 2000 / 2250:4300 / 4500Gm used (rb) (M9) red lettering
1 6U8A / 6KD8 $1.00 RCA 120% / 90% 3000 / 2250:4300 / 4500Gm used (rb) (M9) red lettering
1 6U8A / 6KD8 $1.00 RCA 90% / 130% 2600 / 2250:5200 / 4500Gm used (rb) (M9) red lettering
1 6U8A / 6KD8 $1.00 RCA 95% / 105% 2800 / 2250:4800 / 4500Gm used (rb) (M9) red lettering
1 6U8A / 6KD8 $1.00 RCA 90% / 120% 2400 / 2250:5300 / 4500Gm used (rb) (M9) red lettering
1 6U8A / 6KD8 $0.50 RCA 120% / 85% 3000 / 2250:3800 / 4500Gm used (L) (M9) red lettering - 1 / 2 black coat
1 6U8A / 6KD8 $0.50 RCA 130% / 130% 3000 / 2250:5400 / 4500Gm used leaky (500K) (rb) (M9) red lettering
1 6U8A / 6KD8 $0.50 RCA 140% / 120% 2400 / 2250:5400 / 4500Gm used leaky (200K) (L) (M9) red lettering
1 6U8A / 6KD8 $0.50 GE 140% / 120% 3500 / 2250:5200 / 4500Gm used leaky (500K) (L) (M9) white lettering
1 6U8A / 6KD8 / ECF82 $5.00 International Servicemaster 140% / 120% 3800 / 2250:5200 / 4500Gm NOS (OB) (M9) ---
1 6U8A / 6KD8 / 5KD8 $5.00 Zenith 130% / 110% 2700 / 2250:4900 / 4500Gm NOS (OB) ---
1 6U8A / 6KD8 / 5KD8 $5.00 GE 140% / 110% 3600 / 2250:4500 / 4500Gm NOS (OB) white lettering
1 6U8A / 6KD8 / 5KD8 $5.00 GE 140% / 110% 3600 / 2250:5000 / 4500Gm NOS (OB) white lettering
1 6U8A / 6KD8 / 5KD8 $5.00 GE 140% / 110% 3200 / 2250:4700 / 4500Gm NOS (OB) white lettering
1 6U8A / 6KD8 / 5KD8 $5.00 GE 140% / 110% 3200 / 2250:4700 / 4500Gm NOS (OB) white lettering
1 6U8A / 6KD8 / 5KD8 $5.00 GE 140% / 110% 3300 / 2250:4800 / 4500Gm NOS (OB) white lettering
1 6U8A / 6AX8 / 6KD8 $5.00 Sylvania 140% / 110% 3800 / 2250:5000 / 4500Gm NOS (OB) (M9) yellow lettering
1 6U8A / 6AX8 / 6KD8 $5.00 Sylvania 140% / 110% 4200 / 2250:5200 / 4500Gm NOS (OB) (M9) yellow lettering
1 6U8A / 6AX8 / 6KD8 $5.00 Sylvania 140% / 110% 4000 / 2250:4800 / 4500Gm NOS (OB) (M9) yellow lettering
1 6U8A / 6AX8 / 6KD8 $5.00 Sylvania 140% / 110% 4000 / 2250:4800 / 4500Gm NOS (OB) (M9) yellow lettering
1 6U8A / 6AX8 / 6KD8 $5.00 Sylvania 140% / 110% 4200 / 2250:5200 / 4500Gm NOS (OB) (M9) yellow lettering
1 6U8A / 6AX8 / 6KD8 $5.00 Sylvania 140% / 110% 3400 / 2250:5200 / 4500Gm NOS (OB) (M9) yellow lettering
1 6U8A / 6AX8 / 6KD8 $5.00 Sylvania 140% / 110% 3400 / 2250:4800 / 4500Gm NOS (OB) (M9) yellow lettering
1 6U8A / 6AX8 / 6KD8 $5.00 Sylvania 140% / 120% 3300 / 2250:5000 / 4500Gm NOS (OB) (M9) yellow lettering
1 6U8A / 6AX8 / 6KD8 $5.00 Sylvania 140% / 120% 4000 / 2250:5300 / 4500Gm NOS (OB) (M9) yellow lettering
1 6U8A / 6AX8 / 6KD8 $5.00 Sylvania 140% / 120% 4000 / 2250:5500 / 4500Gm NOS (OB) (M9) yellow lettering
1 6U8A / 6AX8 / 6KD8 $5.00 Sylvania 140% / 140% 3400 / 2250:5800 / 4500Gm NOS (OB) (M9) yellow lettering
1 6U8A / 6AX8 / 6KD8 $5.00 Sylvania 140% / 120% 3400 / 2250:5300 / 4500Gm NOS (OB) (M9) red lettering
1 6U8A / 6AX8 / 6KD8 $5.00 Sylvania 140% / 120% 3800 / 2250:5200 / 4500Gm NOS (OB) (M9) red lettering
1 6AX8 / 6KD8 / 6U8A $5.00 Lindal 130% / 120% 2800 / 2250:5600 / 4500Gm NOS (OB) 1 / 2 gray coat
1 6AX8 / 6KD8 / 6U8A $5.00 Zenith 140% / 120% 3500 / 2250:5600 / 4500Gm NOS (OB) ----
1 6U8A / 6KD8 / 5KD8 $3.00 GE 130% / 120% 3200 / 2250:4800 / 4500Gm used (OB) white lettering
1 6U8A / 6KD8 / 5KD8 $3.00 GE 130% / 100% 3100 / 2250:4800 / 4500Gm used (OB) white lettering
1 6U8A / 6KD8 / 5KD8 $3.00 GE 110% / 100% 2500 / 2250:4400 / 4500Gm used (OB) white lettering
1 6U8A / 6KD8 / 5KD8 $3.00 Lindal 130% / 110% 2800 / 2250:4900 / 4500Gm used (OB) 1 / 2 gray coat
1 6U8A / 6KD8 / 5KD8 $1.00 GE 130% / 90% 3000 / 2250:4000 / 4500Gm used (OB) white lettering
1 6U8A / 6KD8 / 5KD8 $1.00 GE 140% / 90% 3200 / 2250:4200 / 4500Gm used (OB) white lettering
1 6U8A / 6AX8 / 6KD8 / 5KD8 $7.50 Amperex 110% / 110% 2800 / 2250:5000 / 4500Gm NOS (wb) (M9) world logo
1 6U8A / 6AX8 / 6KD8 / 5KD8 $7.50 Amperex 130% / 110% 2800 / 2250:5200 / 4500Gm NOS (OB) (M9) world logo
1 6U8A / 6AX8 / 6KD8 / 5KD8 $5.00 Zenith 140% / 110% 3200 / 2250:5000 / 4500Gm NOS (OB) (M9) ---
1 6U8A / 6AX8 / 6KD8 / 5KD8 $5.00 GE 140% / 110% 3400 / 2250:5000 / 4500Gm NOS (OB) white lettering
1 6U8A / 6AX8 / 6KD8 / 5KD8 $5.00 GE 140% / 110% 3500 / 2250:4800 / 4500Gm NOS (OB) white lettering
1 6U8A / 6AX8 / 6KD8 / 5KD8 $5.00 GE 140% / 110% 3300 / 2250:4900 / 4500Gm NOS (OB) white lettering
1 6U8A / 6AX8 / 6KD8 / 5KD8 $5.00 GE 140% / 110% 3800 / 2250:4700 / 4500Gm NOS (OB) white lettering
1 6U8A / 6AX8 / 6KD8 / 5KD8 $5.00 GE 140% / 110% 3200 / 2250:5000 / 4500Gm NOS (OB) white lettering
1 6U8A / 6AX8 / 6KD8 / 5KD8 $5.00 GE 140% / 110% 3600 / 2250:5200 / 4500Gm NOS (OB) white lettering
1 6U8A / 6AX8 / 6KD8 / 5KD8 $5.00 GE 120% / 110% 2900 / 2250:4700 / 4500Gm NOS (OB) white lettering
1 6U8A / 6AX8 / 6KD8 / 5KD8 $5.00 GE 120% / 120% 2800 / 2250:5800 / 4500Gm NOS (OB) white lettering
1 6U8A / 6AX8 / 6KD8 / 5KD8 $5.00 GE 140% / 120% 3000 / 2250:4900 / 4500Gm NOS (OB) white lettering
1 6U8A / 6AX8 / 6KD8 / 5KD8 $5.00 GE 140% / 120% 3300 / 2250:5800 / 4500Gm NOS (OB) white lettering
1 6U8A / 6AX8 / 6KD8 / 5KD8 $5.00 GE 140% / 120% 3000 / 2250:4700 / 4500Gm NOS (OB) white lettering
1 6U8A / 6AX8 / 6KD8 / 5KD8 $5.00 GE 140% / 120% 3600 / 2250:5200 / 4500Gm NOS (OB) white lettering
1 6U8A / 6AX8 / 6KD8 / 5KD8 $5.00 GE 130% / 120% 3100 / 2250:5000 / 4500Gm NOS (OB) white lettering
1 6U8A / 6AX8 / 6KD8 / 5KD8 $5.00 GE 130% / 120% 2900 / 2250:4800 / 4500Gm NOS (OB) white lettering
1 6U8A / 6AX8 / 6KD8 / 5KD8 $5.00 GE 130% / 120% 3000 / 2250:5500 / 4500Gm NOS (OB) white lettering
1 6U8A / 6AX8 / 6KD8 / 5KD8 $5.00 GE 130% / 110% 3000 / 2250:5000 / 4500Gm NOS (OB) white lettering
1 6U8A / 6AX8 / 6KD8 / 5KD8 $5.00 GE 120% / 120% 3000 / 2250:5200 / 4500Gm NOS (OB) white lettering
1 6U8A / 6AX8 / 6KD8 / 5KD8 $1.00 GE 140% / 90% 3500 / 2250:4600 / 4500Gm used (rb) (M9) white lettering
Notes:
(OB) = original box, (rb) = relabeled/replacement box, (wb) = white box, (L) = loose (no box), (pl) = paper label on tube (original or third party)
(H) = tested on Hickok 539A
(ST)=ST Style, (GT)=GT Style, (TT)=Tall Tubular, (M7)=7pin miniature, M9=9pin miniature, (SM)=subminiature, JAN = Military
Emission Strength = Percentage of emission measured on Eico 666 tube tester
(Emission Strength = 100% baseline reference, >80%:good, >60%:fair >40%=diode good).
Gm = Mutual conductance measured on Hickok 533 tube tester; Except (H)=tested on Hickok 539A
(Gm = measured/baseline, measured1:measured2/baseline, measured1:measured2/baseline1:baseline2).

How To Order:

Purchasing our audio tubes is easy.
Just send us an email indicating the tubes (including quantities) you want.
We will let you know the total price including shipping and handling.

Shipping and Handling Information

Contact MDB Ventures
sales@mdbventures.com
or
sales@fourwater.com

Due to the highly volatile nature of the tube business, all Prices are subject to change without notice.

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Contact MDB Ventures
sales@mdbventures.com
or
sales@fourwater.com