Vacuum Tube
The futurist Paul Saffo Why Google is like a fungus and what Facebook has become Silicon Valley futurist Then Paul Saffo was thinking, talking and writing about the future of technology for more than two decades. Among other works, he is a managing director at the investment company identifies research investment taught at Stanford and is a board member of the Long Now Foundation, which challenges society to think about their actions as part of 10,000 years.
Vacuum Tube: How Does It Work? (Part 1)
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VACUUM TUBE ~ 12FX5 ~ RCA ~ NOS ~ 12FX5 $2.95 |
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DK40 – MDK40 PHILIPS VACUUM TUBE $4.47 |
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VINTAGE ARMY SIGNAL CORPS. VACUUM TUBE,BY HYTRON CORP.TUBE VT-37 $2.99 |
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5957 JAN ITT VACUUM TUBE $37.47 |
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12SN7 GTA blk plates Vintage Vacuum Tube $7.95 |
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VINTAGE ARMY SIGNAL CORPS. VACUUM TUBE,BY HYTRON CORP.TUBE VT-38 $2.99 |
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RED SILICONE VACUUM HOSES TUBE STI WRX LEGACY GTI GOLF $32.99 |
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GE 6V6GT Audio Amp Vacuum Tube ~ Two X Tested Gm= 4200 @ 25 ma (D) $9.95 |
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VACUUM TUBE ~ 12FX5 ~ WESTINGHOUSE ~ NOS ~ 12FX5 $2.95 |
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Acoustic Research AR4131 blackVault Vacuum Tube 2.1 Speaker System w/ iPod Dock $89.00 |
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VACUUM TUBE ~ # 5725 ~ GE ~ NOS ~ # 5725 $2.95 |
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GE 6V6GT Audio Amp Vacuum Tube ~ Two X Tested Gm= 4550 @ 26 ma (E) $9.95 |
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Eimac Vacuum Tube 3CX800A7 Date Code 0530 HAM RADIO Linear Amplifier $299.99 |
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GE 6V6GTA Audio Amp Vacuum Tube ~ Two X Tested Gm= 4100 @ 20 ma (F) $9.95 |
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10GK6 Sylvania Vacuum tube fully TESTED good – FREE shipping $4.95 |
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10GN8 Sylvania Vacuum tube fully TESTED good – FREE shipping $4.95 |
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12BV7 Sylvania Vacuum tube fully TESTED good – FREE shipping $7.95 |
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12DQ7 Sylvania Vacuum tube fully TESTED good – FREE shipping $7.95 |
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Eimac Vacuum Tube Socket SK 410 For 3-500Z, 4-400 Tubes HAM RADIO $29.99 |
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6GY8 Sylvania Vacuum tube fully TESTED good – FREE shipping $5.95 |
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6HB6 Sylvania Vacuum tube fully TESTED good – FREE shipping $5.75 |
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6HG8 Sylvania Vacuum tube fully TESTED good – FREE shipping $5.95 |
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6JD6 Sylvania Vacuum tube fully TESTED good – FREE shipping $4.95 |
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6JH6 Sylvania Vacuum tube fully TESTED good – FREE shipping $4.95 |
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6JU8A Sylvania Vacuum tube fully TESTED good – FREE shipping $4.95 |
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6KA8 Sylvania Vacuum tube fully TESTED good – FREE shipping $4.95 |
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6KE8 Sylvania Vacuum tube fully TESTED good – FREE shipping $4.95 |
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6KR8 Sylvania Vacuum tube fully TESTED good – FREE shipping $6.95 |
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6LF8 Sylvania Vacuum tube fully TESTED good – FREE shipping $5.95 |
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8CG7 – 8FQ7 Sylvania Vacuum tube fully TESTED good – FREE shipping $4.95 |
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8CS7 Sylvania Vacuum tube fully TESTED good – FREE shipping $4.95 |
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8GN8 – 8EB8 Sylvania Vacuum tube fully TESTED good – FREE shipping $4.95 |
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8LT8 Sylvania Vacuum tube fully TESTED good – FREE shipping $4.95 |
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1940,S U.S. ARMY SIGNAL CORPS VACUUM TUBE VT-205 BY BENDIX AVIATION CORP. $2.99 |
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1940,S U.S. ARMY -NAVY VACUUM TUBE VT-90-A BY SYLVANIA JAN CHS 6H6GT/G TUBE. $2.99 |
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6AL3 EY88 NOS RCA radio amplifier vintage vacuum tubes 2 tube tested 6AL3 EY88 $15.99 |
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6JM6A NOS RCA radio amplifier vintage electron vacuum tubes 2 tube tested 6JM6 $19.99 |
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1944 NATIONAL UNION U.S. ARMY/NAVY ISSUED RADIO TUBE VACUUM HAM TV CNU 1625 CRC $9.99 |
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HP-45B Vacuum tube (2) – Kuthe Laboratories $9.99 |
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Vacuum Tube Handbook Vol 1 Book Vintage Radio Amp Tubes $23.35 |
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Vintage 1950’s RCA AM Capehar T-15 Table Top Vacuum Tube Radio $5.24 |
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Vintage Simpson 555 Vacuum Radio Tube Tester for Parts/Repair $26.00 |
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7984 GE Compactron Beam Power Vacuum Tube $7.00 |
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7984 GE Compactron Beam Power Vacuum Tube (Pair – 2 tubes) NOS $18.00 |
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VACUUM TUBE ~ 6CL8A ~ SYLVANIA ~ NOS ~ 6CL8 A $3.95 |
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GE 6V6GT Audio Amp Vacuum Tube ~ Two X Tested Gm= 4100 @ 22 ma (L) $9.95 |
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Vacuum Tube Logic VTL 2-LP set: Lesley Olsher – LESLEY – OOP, 1991, USA-NEW / SS $89.99 |
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VINTAGE GC ELECTRONICS 12-PIN COMPACTRON HIGH VOLTAGE VACUUM TUBE SOCKET $9.99 |
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GE 6V6GT Audio Amp Vacuum Tube ~ Two X Tested Gm= 4300 @ 25 ma (N) $9.95 |
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VINTAGE NRI VACUUM TUBE VOLTMETER MODEL W $11.95 |
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VACUUM TUBE ~ 6HZ6 ~ SYLVANIA ~ NOS ~ 6HZ6 $2.95 |
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GE 6V6GTA Audio Amp Vacuum Tube ~ Two X Tested Gm= 3950 @ 21 ma (O) $9.95 |
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SILICONE VACUUM HOSES TUBE LANCER ECLIPSE 3000GT EVO8 9 $32.99 |
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1 Firestone by Ken Rad 6K6G Vacuum Tube ST Shape Tested $14.99 |
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36 Vacuum Tube Marconi USA NOS NIB Tetrode #36 VT-36 $5.95 |
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39/44 Vacuum Tube Marconi Radiotron NOS Pentode #39/44 $3.95 |
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VINTAGE HEATHKIT PRECISION VACUUM TUBE VOLTMETER-MODEL V-7-WORKS $9.50 |
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RCA JAN-CRC-6AS7-G Amp Radio Vacuum Audio Tube Black Plate 6AS7G Tests Strong $11.49 |
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GE 6V6GT Audio Amp Vacuum Tube ~ Two X Tested Gm= 4150 @ 22 ma (Q) $9.95 |
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Vacuum Tube Radio Lot 11,6AU8,6BU8,6CU5, 6CM7 Asst $24.99 |
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GROOVE TUBES Medium Duet – 5881 Vacuum Tube $74.95 |
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Vintage Brimar GZ34 5AR4 Valve/vacuum tube $31.00 |
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1PC Shuguang Audio Vacuum Tube EL34B EL34-B (6CA7) $13.50 |
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GE 6V6GT Audio Amp Vacuum Tube ~ Two X Tested Gm= 4150 @ 26 ma (R) $9.95 |
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1 TOP QUALITY **5*STAR** GE 6X4WA 6202 6X4 BLACK PLATE Amp Vacuum Audio Tube $16.00 |
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Sept. 1923 RADIO BROADCAST Magazine Feature: Hundred-Billion-Dollar Vacuum Tube $9.49 |
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EL34 VACUUM TUBE T SHIRT XL VINTAGE MULLARD amplifier MARSHALL DYNACO leak e34l $15.00 |
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GE 6V6GT Audio Amp Vacuum Tube ~ Two X Tested Gm= 4450 @ 24 ma (S) $9.95 |
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CHATHAM ELECTRONICS JAN-CAHG-OC3W RADIO VACUUM TUBE 5932 (NEW OUT OF BOX) $90.00 |
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1 AMPEREX 12AX7 ECC83 RADIO AUDIO AMP MIC VACUUM TUBE VALVE DELTA HOLLAND 1960’s $19.99 |
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Vacuum Tube Vintage Glass Crosley 6SN7GT & Box NOS $24.99 |
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GE 6V6GT Audio Amp Vacuum Tube ~ Two X Tested Gm= 4100 @ 23 ma (U) $9.95 |
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1x NEW Sovtek EL84M 6BQ5 Sov Vacuum Tube TESTED $12.75 |
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GE (labeled CBS) 6V6GT Audio Amp Vacuum Tube ~ Two X Tested Gm= 4200 @ 22 ma (V) $9.95 |
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VINTAGE KEN-RAD RADIO TUBE 6AE6G , NEW VINTAGE STOCK VACUUM TUBE !! $1.99 |
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GE 6V6GT Audio Amp Vacuum Tube ~ Two X Tested Gm= 4550 @ 25 ma (W) $9.95 |
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GE 12B4A vacuum tube $5.99 |
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2x NEW Sovtek EL84M 6BQ5 Vacuum Tube, Matched Pair TESTED $25.75 |
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GE 6V6GT Audio Amp Vacuum Tube ~ Two X Tested Gm= 4200 @ 26 ma (Y) $9.95 |
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4x NEW Sovtek EL84M 6BQ5 Sov Vacuum Tube, Matched Quad TESTED $51.50 |
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Military Vacuum Tube Crystal Quartz 5 MHz USSR Russia HAM Radio Part $28.98 |
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GE 6V6GT Audio Amp Vacuum Tube ~ Two X Tested Gm= 4100 @ 24 ma (Z) $9.95 |
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KIRBY VACUUM CLEANER FILL TUBE inner cloth bag hose HERITAGE 2 LEGEND G3 G4 G5 $10.70 |
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GM 7A8 Vacuum Tube, Used, Tested $4.00 |
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RCA 6MU8 Vacuum Tube NOS $2.94 |
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Raytheon 6V8 Vacuum Tube NOS $3.48 |
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Zenith 6U9 Vacuum Tube NOS $2.50 |
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Zenith 11AR11 Vacuum Tube NOS $4.00 |
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Zenith 9BJ11 Vacuum Tube NOS $3.75 |
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GE 10DX8 LCL84 Vacuum Tube NOS $3.78 |
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VINTAGE 1963 General Electric Vacuum Tube Radio – AM FM – wood – T1261A – works $5.00 |
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1x Vacuum Tube Spring Retainer Holder for KT88 6L6,88R $3.99 |
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Simpson vacuum tube voltmeter $9.99 |
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NIB WESTERN ELECTRIC 394 A VACUUM RADIO TUBE $10.00 |
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RCA 6GH8A 6GH8 6EA8 BLACK PLATE MATCHED SET PAIR Amp Audio Vacuum Vintage Tube $18.00 |
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Gold Vacuum AMP Tube 8-Pin Socket KT88 6550 EL34,1AG $3.99 |
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Vacuum Tube 9-Pin Socket for 6DJ8 E80CC EL84 EZ81,92G $5.50 |
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1931 RCA Radio Victor Radiotron UY-224 vacuum tube ad $4.25 |
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1x Gold Vacuum Tube AMP 9-Pin Socket 12AX7 12AU7,9FG w $5.20 |
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VACUUM TUBE ~ 6KA8 ~ SYLVANIA ECG ~ NOS ~ 6KA8 $2.95 |
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Vacuum Tube $17.9 Pricing subject to change. Vacuum Tube |
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Flex Vacuum Tube $4.49 Pricing subject to change. Flex Vacuum Tube |
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Vacuum Tube Kit $25.27 Pricing subject to change. Vacuum Tube Kit |
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Vacuum Tube Assembly $21.27 Pricing subject to change. Vacuum Tube Assembly |
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Vacuum Exhaust Tube $8.5 Pricing subject to change. Vacuum Exhaust Tube |
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Vacuum Tube Knob $2.91 Pricing subject to change. Vacuum Tube Knob |
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Fein 921001AK13 Turbo III Vacuum Extension Tube $9.99 Turbo III Vacuum Extension Tube – 921001AK13 |
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JJ Electronics 12AX7 / ECC83 Preamp Vacuum Tube $14.95 JJ Electronics 12AX7 / ECC83 Preamp Vacuum Tube |
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JJ Electronics 5AR4 / GZ34 Rectifier Vacuum Tube $23.5 JJ Electronics 5AR4 / GZ34 Rectifier Vacuum Tube |
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JJ Electronics 12AU7 / ECC82 Preamp Vacuum Tube $13.95 JJ Electronics 12AU7 / ECC82 Preamp Vacuum Tube |
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JJ Electronics EL84 Power Vacuum Tube $29.95 JJ Electronics EL84 Power Vacuum Tube |
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JJ Electronics EL34 Power Vacuum Tube $19.95 JJ Electronics EL34 Power Vacuum Tube |
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JJ Electronics 6V6 Power Vacuum Tube $19.95 JJ Electronics 6V6 Power Vacuum Tube |
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JJ Electronics 12AT7 / ECC81 Preamp Vacuum Tube $14.95 JJ Electronics 12AT7 / ECC81 Preamp Vacuum Tube |
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dbx 386 Dual-Vacuum Tube Preamp $450.46 dbx 386 Dual-Vacuum Tube Preamp |