Miniature Vacuum Tubes
Miniature Vacuum Tubes
 |
 1J29B V 1J29B Miniature Tiny HF Pentode NOS QTY20  US $9.99
|
 1J37B Vintage Soviet miniature pentode NOS TUBE QTY15 US $8.88
|
 6P15P EV Matched S 14 GOLD GRID EL83 SV83 NOS MATCHED PAIR Soviet TUBES US $9.99
|
 Vintage Vacuum Tubes Lot of 100 AUDIO AMPLIFIER RADIO TV HAM US $9.95
|
 Box Lot of 80 Vintage Vacuum Tubes AUDIO AMP HAM RADIO TV US $8.95
|
 2x TESTED MATCHED 6P15P ER GOLD GRID TUBES OCTET USSR EL83 SV83 6P15P EV 6P15P US $11.99
|
 TWO SYLVANIA 6CW4 6DS4 NUVISTOR VACUUM TUBES NOS NIB US $4.99
|
 2x Old Stock 6N2P EV 6N2P 80s MATCHED TUBES ECC83 12AX7 US $9.99
|
 2x MATCHED CCCP 6N2P EV 6N2P SARATOV 60s TUBES Military ECC83 12AX7 US $24.99
|
 2x Teflon Vacuum Tube Damper for 12ax7 6dj8 5842 12au7 US $12.00
|
 Knight Radio Ultralinear Vacuum TubePush Pull Output Transformer 18W US $35.00
|
 4x MATCHED SARATOV 60s GOLD GRID STRONG QUAD 6P14P EL84 NOS Tubes US $69.99
|
 1J18B Vintage Soviet miniature pentode NOS TUBE QTY15 US $9.99
|
 4x TESTED MATCHED 6P15P EV GOLD GRID TUBES OCTET USSR EL83 SV83 6P15P ER 6P15P US $14.99
|
 AA5 Miniature Tube Set Tested GOOD 12BE6 12BA6 50C5 12AU6 35W4 US $9.99
|
 Electro Harmonix 6C45Pi Gold Pins Match Pair 6S45P E US $60.00
|
 6AG5 Vacuum Tube Vintage Tube No Reserve One Cent US $.01
|
 12AU7A Vacuum Tube Vintage Tube No Reserve One Cent US $.01
|
 6AU4 RCA Vacuum Tube Vintage Tube No Reserve One Cent US $.01
|
 6AV6 Vacuum Tube Vintage Tube No Reserve One Cent US $.01
|
 4 DuoDAMP TUBE AMP DAMPERS FOR 12AX7 12AU7 12AT7 12BH7 5751 EL84 6922 EF86 7025 US $49.99
|
 Vacuum Tubes 6189 12AU7 JAN SYLVANIA 5 NOS NIB TUBES US $55.99
|
 2 WESTINGHOUSE 6AX7 Vacuum Tubes NOS Boxes Audio Amp 6N2P equiv US $10.50
|
 MULLARD BOGEN EF86 6267 Vacuum Tube Audio Amp Tests Strong US $10.50
|
 GE JAN 5687 WB Vacuum Tube NOS Orig Box Tests Strong US $6.50
|
 9 assorted Sub Miniature tubes dual triode tube US $9.99
|
 9 pin breadboard prototype tube socket for DIY experimenting US $18.00
|
 Vacuum Tubes 6AV5GA GE 4 PC NOS NIB US $22.99
|
 Radio VacuumTubes 6GV8 ECL85 AMPEREX EURO 5 NOS NIB US $20.99
|
 Vacuum Tubes 6GK5 MULLARD UK 5 NOS NIB US $14.99
|
 Radio Vacuum Tubes 6CB6A 6CF6 GE 4 NIB NOS US $12.99
|
 6S19P V Russian Audiophile Tubes 1981 QTY8 US $16.00
|
 Vacuum Tubes 12AV7 GE 5 pc NOS NIB US $20.99
|
 Vacuum Tube Sockets COMPACTRON SOCKET 12 PIN 4 pc US $9.99
|
 Vacuum Tube Sockets CERAMIC LOCTAL SOCKET 8 PIN 6 pc US $9.99
|
 10 RUSSIAN MINIATURE PENTODE TUBES 1J37B US $7.50
|
 LOT OF 53 VINTAGE VACUUM TUBES USA Octal Miniature Cunningham RCA GE MORE US $9.99
|
 LOT OF 74 VINTAGE VACUUM TUBES USA Octal Miniature Raytheon Westinghouse Delco US $9.99
|
 LOT OF 100 VINTAGE VACUUM TUBES USA Octal Miniature Noval 7 Pin Tubes R US $9.99
|
 LOT OF 100 VINTAGE VACUUM TUBES USA Miniature Arcturus Lindal Olson ITT CBS US $9.99
|
 LOT OF 100 VINTAGE VACUUM TUBES USA Miniature Arcturus Raytheon ITT DuMont US $9.99
|
 LOT OF 96 VINTAGE VACUUM TUBES USA Noval Miniature Tubes RCA Sylvania US $9.99
|
 LOT 100 VINTAGE VACUUM TUBES USA Miniature Philco CBS DuMont ITT RCA MORE US $9.99
|
 LOT OF 100 VINTAGE VACUUM TUBES USA Miniature Westinghouse Sheldon Zenith US $9.99
|
 LOT OF 98 VINTAGE VACUUM TUBES USA Miniature Delco Sheldon RCA GE Raytheon US $9.99
|
 PAIR 6754 BENDIX National Tubes USA NOS Full Wave Rectifier Super 412A Gold Pins US $109.95
|
 Tube Shield 9 Pin Miniature IERC TRN6 6015B NEW US $1.49
|
 TESTED MATCHED BALANCED QUAD of 6P14P SARATOV STRONG Tubes EL84 US $44.99
|
 6P15P EV GOLD GRID USSR EL83 SV83 NOS MATCHED PAIR TUBES US $9.99
|
 Vacuum Tube Sockets 12 pin COMPACTRON 4 pieces US $9.99
|
 Vacuum Tube Sockets COMPACTRON SOCKET 9 PIN 4 pc US $9.99
|
 Russian Low Voltage tube 6N27P ECC86 6GM8 1pcor more US $20.00
|
 Russian Vacuum Kenotron 6U4P EV 6Z4P EV 1pcor more US $3.00
|
 Radio Vacuum Tubes 8BN8 RCA 5 NIB NOS US $20.99
|
 Vacuum Tubes 5750 6BE6 JAN PHILIPS 5 PC NOS NIB US $15.99
|
 Radio Vacuum Tubes 6J11 GE compactron 5 NIB NOS US $20.99
|
 6D6A V Russian Tiny HF Diode Tubes NIB Lot of 10 US $5.00
|
 CINCH TUBE SOCKET MICANOL 7 PIN MINIATURE NO SHLD LUGS US $2.99
|
 Radio VacuumTube 6AX5GT 1 piece NOS NIB US $3.00
|
 A Set of Eight Minature 7 Pin Sockets NOS US Made US $10.00
|
 A Set of Ten Minature 7 Pin Sockets NOS US Made US $10.00
|
 A Set of Nine Minature 7 Pin Sockets NOS US Made US $10.00
|
 A Set of Eight Minature 7 Pin Sockets NOS US Made US $10.00
|
 A Set of Six Minature 7 Pin Sockets NOS US Made US $8.00
|
 Damper for Vacuum Tube 8 Each Octal 6SN7 Loctal 7F8 US $4.49
|
 6186w Jan Philips US $60.00
|
 6BQ7A Jan GE US $600.00
|
 Radio Vacuum Tubes 6CZ5 RAYTHEON JAPAN 3 NIB NOS US $21.99
|
 Radio Vacuum Tubes 6CZ5 GE BLACK PLATE 3 NIB NOS US $21.99
|
 Radio Vacuum Tubes 6EW6 GE 4 NIB NOS US $12.99
|
You Owe Your PC to a Circuit Board Screwed onto a Piece of Plywood
It all Started with a simple integrated circuit board screwed onto a piece of plywood.
You owe your laptop or PC to a kit for flashing lights.
How was it that in our time the Personal Computer (P.C) and the laptop computer came about to be?
It all started with the invention of the transistor in 1949 by Bell Labs – the research arm of the “phone company”. . The transistor was nothing more than a Solid State electronic switch. The transistor or integrated circuit replaced the much larger vacuum tubes of the day. Vacuum tubes were large, hot and unreliable. Transistors performed essentially the same functions as tubes but were smaller , lighter , cooler and more reliable All said and done they were better ,smaller and more efficient than the vacuum tubes they replaced. . And transistors did not “burn out” like a Vacuum Tube.
Transistors allowed a trend of miniaturization that has led all the way to our present portable small laptop / notebook computers which can run on batteries. It is hard to visualize for us today that computers used to house large office buildings themselves – along with maintenance backup support staff and even their own air conditioners to remove the great amounts of heat the early, primitive computers produced.
In 1959 engineers at Texas Instruments figured out how to put more than one transistor on the same base and connect these transistors without wires. Thus the next step was born – the integrated circuit. The first integrated circuit consisted of only six transistors. Current computers have in the range of 100 million transistor equivalents.
In 1969 Intel introduced the 1 k memory chip. This was much larger than anything else produced at the time. Through coordination of Intel with a Japanese calculator manufacturer named Busicomp the next step was made where a generic multipurpose chip was devised. What made this step important was that no one chip could do a number of tasks. Previously each chip had a purpose that was burnt in. Now one integrated chip could do a number of different functions. One single integrated circuit chip was almost an entire computing device. The successor to this multi purpose integrated circuit or “CPU” was what went on to the basis of our whole generation and concept of personal computers/
In 1973 some of these microcomputer kits based on the initial 8080 Intel integrated chip were developed. In the hands of hobbyists these kits were put together and were nothing more than blinking lights. However the impetus was on. Many of these early hobbyists went on to become computer industry giants. With Intel introducing an even much more powerful microprocessor chip the computer industry was on its way.
A company MITS introduced the “Altair Computer Kit”. The Altair was the impetus for fledgling software companies, such as Microsoft and Lotus, to write software programs for these early computers. Among the early innovators and producers of software in this field was Microsoft with its first version of Microsoft “Basic”.
Along came the computer industry leader and stodgy monolith IBM to introduce the first “personal computer” in 1975. The model 1500 was beyond piddly compared to today’s dollar store calculators and cost only $ 9,000.
Next came a smaller “upstart “Computer Company which came to be called Apple Computer. Apple computer introduced the Apple I computer in 1976 for the princely sum $ 695. Believe it or not original “Apple 1 computer” consisted of a main circuit board screwed into a piece of plywood. Talk about IBM having to hold its laughter The Apple I appeared to be such a home garage made amateur none professionally made product that the case and power supply were not even included. The buyer of the Apple I had to scrounge or source this himself. IBM thought the Apple I was nothing more than a foolish fad. A minor inconvenience that would soon go away and disappear. Yet department heads started buying these simple computers for uses in business departments. This was in spite of serious advice from IBM experts to corporations about the perils and shortcomings of these toy computers and outright threats by IBM salespeople to IT staff and heads.
The Apple I was followed in 1977 by the Apple II. The Apple II because of its enormous success set the standards for nearly all the important microcomputers to follow, including the IBM PC.
The very core of the early computer world – IBM “International Business Machines” – the master of the profitable mainframe computer industry had been awoken from its deep profitable slumber by a small upstart computer maker with a simple computer system that began its product cycle as an integrated circuit board screwed onto a piece of plywood.
About the Author
Did you find this article useful? For more useful tips and hints, points to ponder and keep in mind, techniques, and insights pertaining to credit card, do please browse for more information at our websites.
http://www.yoursgoogleincome.com
http://www.freeearningtip.com