Tube Nos Nib
Tube Nos Nib
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 GE General Electric Grey Plate JAN CG 6SL7GT 6SL7 6SL7WGT VT229 NOS strong pair  US $31.66
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 Vintage NIB NOS 5591 403B Western Electric Vacuum Tube US $12.99
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 Vintage GE 6K6GT Vacuum Ham Amp Radio Tube 60 22 Date Codes Black Plates US $7.99
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 Raytheon 6SL7GT Vintage Ham Radio Vacuum Tube US $5.99
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 Vintage IEC Mullard 6AW8A Vaccum Tube Amp Radio Ham US $5.99
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 Vintage Amperex 6J6 ECC91 England made Bugel Boy Tube Ham Radio US $11.99
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 National Union JAN CNU 6SL7GT Black Glass Vintage Tube 247 51 39 date codes US $19.99
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 Vintage RCA VT 87 6L7 Vaccum Tube Amp Radio Ham Nice US $5.99
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 Rauland Branded RCA 12BH7A Tube Vacuum Radio Vintage 64 52 274 Date Codes US $9.99
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 Vintage RCA 5651A Vaccum Tube Amp Radio Ham 66 22 Date Codes US $4.99
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 Vintage RCA 5965 Vaccum Tube Amp Radio Ham US $5.99
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 NOS RCA Westinghouse 2A3 Tube Pair Matching Gm Test STRONG Double Plate US $79.99
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 GE 6SN7GTB 6SN7GT 6SN7 VT 231 VT231 black plate matched NOS quad US $33.00
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 4 Fisher RCA 7868 Tubes MATCHED QUAD US $82.51
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 2 Dumont 7591 Tubes MATCHED PAIR US $37.02
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 2 RCA Smoked 6V6 GT Tubes TEST STRONG US $22.00
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 1 RCA Red Base 5691 6SL7 Tube NEW IN BOX US $51.99
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 NOS WIZARD 201A TUBE NIB D63 US $12.00 |
 1 Sylvania 6V6 GTA Tube TESTS STRONG US $10.99
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 1 Telefunken ECC82 Tube 12AU7 TESTS STRONG US $26.00
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 Pair NOS Tung Sol 7355 Vacuum Tubes Boxed Tested Excellent US $29.95
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 2 MISCELLANEOUS NOS 01A TUBES NIB D60 US $2.91 |
 4 NOS AMPEREX 6DJ8 TUBES NIB TEST GOOD D43 US $43.60 |
 1 Fisher Telefunken ECC83 Tube 12AX7 TESTS STRONG US $20.00
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 4 NOS AMPEREX 6DJ8 TUBES NIB TEST VERY GOOD D42 US $32.00 |
 1 Amperex Bugle Boy ECC82 Tube 12AU7 TESTS STRONG US $16.50
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 2 Mullard ECC83 Tubes 12AX7 TEST STRONG US $42.00
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 4 NEW IN BOX GE 6Z10 6J10 COMPACTRON TUBES US $9.95
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 4 x 6X5GT Sylvania Tubes NOS US $44.00
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 50x 6SA7GT Vacuum Tubes TUNG SOL NOS US $60.00
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 4pcs 12AX7 12AU7 9 Pin Ceramic TUBE Amplifier SOCKET9PC m US $.90
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 GEC UK rare NOS KT66 Miniwatt kinkless tetrode strong tube US $66.80
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 10x Phenolic Corp USA Vintage 4 Pin Tube Sockets New Old Stock US $48.00
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 10x Amphenol USA Vintage 6 Pin Tube Sockets New Old Stock US $48.00
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 LOT OF3 SYLVANIA GOLD BRAND 6U8A ALL TEST GOOD US $10.00
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 PAIR OF VINTAGE RCA 6L6 BRAND NEW OLD STOCK METAL TUBE TESTS STRONG US $16.50
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 4 NEW IN BOX GE 6AY3B 6BS3A DIODE TUBES US $9.95
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 Telefunken Germany EL34 dual getter pentode strong matched pair one NOS US $152.50
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 ELECTRONICS COMPONENTS IC TRANSISTOR 3 4 8 PIN SPACERS TEST EQUIPMENT AMP PREAMP US $22.99
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 A VINTAGE RAYTHEON 5U4GB BLACKPLATE NOS NIB VAC TUBE US $19.99
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 A VINTAGE CBS by GE 5U4GB BLACKPLATE NOS NIB VAC TUBE US $19.99
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 A PAIR OF MOTOROLA by GE 12AU7A ECC82 NOS NIB VAC TUBES US $19.99
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 A VINTAGE GE 12BH7A NOS NIB VAC TUBE US $19.99
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 A LOT OF 5 SYLVANIA 6AL5 NOS NIB VACTUBES US $9.99
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 NOS SYLVANIA 5751 TUBE TRIPLE MICA BLACK PLATE D87 US $37.50 |
 25 NOS NIB 12AV7 5965 3 Free Audio Tubes US $100.00
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 12 NOS NIB 6X5GT 10 6C5 Audio Tubes US $75.00
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 5 NEW IN BOX WESTINGHOUSE 6JU8A RADIO TUBES 6JU8 US $9.95
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 SEVEN 7 GE 21JS6A 23JS6A NIB NOS US $35.95
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 MATCHED QUAD GE 6KN6 BEAM POWER NIB NOS US $65.95
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 PAIR of NOS NIB GE 12B4A Audio Amplifier HiFi Stereo Vacuum tubes US $10.99
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 5 NEW IN BOX SYLVANIA 17JQ6 POWER PENTODE TUBES US $12.95
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 4 NOS Test Kenwood Ham Radio Sets 6146B 12BY7A Tubes US $150.00
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 3 NOS NIB 4 NOS Test 6KD6 Ham Sweep Tubes US $100.00
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 3 NOS NIB Amperex Matched Blackburn Codes 12AX7A Audio Tubes US $202.50
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 EL34 6CA7 Mullard xf2 Tubes lOl Pair Great Britain NOS NIB Test Great 4363 US $127.50
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 5 Raytheon tubes 6T8 6AF3 6JU8 6GJ7 6LM8 US $5.00
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 5563A RCA Thyratron Tube NOS 4746 US $289.99
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 5 Raytheon tubes 4EJ7 4DT6 4BQ7 4BZ6 4GK5 US $5.00
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 Pair NOS Sylvania 12AU7A tubes US $19.95
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 JAN Philips 6189 W Tube NOS US $14.95
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 2 NOS Test Mullard 2 NOS NIB US 5AR4 GZ34 Audio Tubes US $183.88
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 10x Cinch Manufacturing Corp USA Vintage 8 Pin Tube Sockets New Old Stock US $50.00
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 Lot of 22 Mixed Radio Vacuum Tubes in Boxes NOS Used Complete List US $2.47
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 1 Mint NOS NIB GE 5 Star Blackplate 6386 Audio Tube US $100.00
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 9 Mint NOS NIB Blackplate Syl RCA CBS 5U4GB Audio Tubes US $99.99
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 Lot of 15 Vacuum Tubes 1 GE 6AQ5A RCA 6BC5 GE 6663 RCA 9002 RCA 12AU6 more US $15.00
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 Lot of 15 Vacuum Tubes 2 GE 6AQ5A RCA 6BC5 GE 6AU6A RCA 9002 RCA 12AU6 more US $15.00
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 Lot of 15 Vacuum Tubes 3 GE 6663 RCA 6BC5 RCA 9002 GE 6AK6 RCA 6J6A more US $15.00
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 2 NOS General Electric 6JE6C 6LQ6 Vacuum Tubes for Kenwood National Swan Radios US $41.00
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How Pens Work
Pens are ranked high among the most often and widely used writing instruments. In the United States alone, about 2 billion pens are manufactured annually. There are many different kinds of pens but the most common ones are 1) ballpoint pens, (2) fountain pens, (3) soft-tip pens, (4) roller ball pens, and (5) specialty pens.
Ballpoint pens have a tiny brass, steel or tungsten carbide ball as the writing tip. The ink reservoir is the compartment in the pen that holds the ink and a narrow tube connects the reservoir to the ball. The ball that is fitted into a socket turns as it rolls across the paper carrying the ink from inside the pen. Most ballpoint pens have a cap made or plastic that is used to close the tip and prevent the ink from drying on the ball. Several modifications have seen the ball point pen have a push-button mechanism that automatically pushes out the body of the pen as the button is clicked or pushed.
The effect of gravity pushes out the ink to the ball and makes it flow smoothly, so because of this, using a ballpoint pen to write sideways may prevent the ink from flowing out properly. To prevent this, some ballpoints are designed to ensure that slight pressure is applied behind the ink column. With this design, the ink from the reservoir will be able to move constantly forward and the pen to write even when its point is higher than its back end. The ink in ballpoint pens is made to be sticky ink because if it was thinner ink, it might leak out of the ball. Sticky ink results in a less smooth write than most pens.
A nib is the writing point in fountain pens. Nibs are made in a triangular like form and are usually made of gold or stainless steel. The ink is carried from the pen’s reservoir to the nib by a system of narrow tubes known as the feed. Fountain pens use a highly fluid ink and a property called capillarity is what draws the ink into the feed. The feed includes a number of air passages which allow air to fill the top of the reservoir as ink is drawn from the bottom. The ink flows easily as the air pressure in the pens is the same as the pressure outside the pen.
Roller ball pens use a combination of features from the ballpoint, fountain and soft tip pens. The roller ball has a tiny ball that turns in a socket at the tip just like a ballpoint would but the ink used in roller ball pens use highly fluid ink, just like the fountain. This will ensure a smooth write like soft tip pens. Roller ball pens are made with either a capillary reservoir such as the ones used in soft-tip pens or a reservoir like that of ballpoints. The ink is drawn from the reservoir using a wick made of absorbent material which carries the ink to the ball and only a limited amount of ink can be carried from the wick at a time. This mechanism allows the ink from leaking out. Specialty pens are made for specific purposes and most of them are like gel pens. Gel pens are commonly used among artists and mechanical drafters. Another specialty pen is called a lettering pen which is used to write calligraphy styled writing.
UntitledKim is the author of Discountmugs.com. If you would like more information aboutBallpoint pens, such as Ballpoint pens, please visit http://www.discountmugs.com
About the Author
Kim is the author of Discountmugs.com. If you would like more information aboutBallpoint pens, such as Ballpoint pens, please visit http://www.discountmugs.com