Tester Tube
Tester Tube
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 4ea Sylvania Baldwin 12ax7 Radio Vacuum Tubes  US $33.00
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 Sylvania Chrome Dome 6SN7GTA 6SN7GT 6SN7 VT231 black plate match strong pair US $43.00
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 LOT 4 Matched Sylvania 6SN7 GT Tubes SEE PICTURES ON TESTER US $26.00
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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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 NOS RCA Westinghouse 2A3 Tube Pair Matching Gm Test STRONG Double Plate US $79.99
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 6CG7 6FQ7 AUDIO AMPLIFIER HAM RADIO TV TUBE RCA brand pair US $3.95
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 6H6 6H6G AUDIO AMPLIFIER HAM RADIO TV TUBE Zenith brand US $3.95
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 6AK5 5654 6096 AUDIO AMPLIFIER HAM RADIO TV TUBE Sylvania brand pair US $3.95
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 6J5 AUDIO AMPLIFIER HAM RADIO TV TUBE RCA brand pair US $3.95
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 6BW4 audio amplifier HAM radio rectifier tube GE brand US $2.95
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 6AQ5A 6AQ5 audio amplifier radio TV tubes Sylvania brand pair US $3.95
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 6K6 6K6GT audio amplifier TV radio tubes RCA brand pair US $2.95
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 BLUE TIPPED ARCTURUS 127 A TUBE D74 US $34.33 |
 4 ARCTURUS 127 ENGRAVED BASE TUBES D73 US $43.51 |
 Vintage Magnavox EL84 6BQ5 Stereo Tube Amplifier Mullard Blackburn Tubes US $134.50
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 THREE VINTAGE RCA GE 211 VT 4C BIG TRIODE AMPLIFIER TUBE US $202.53
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 FOUR VINTAGE MULLARD EL34 6CA7 AMPLIFIER TUBE XF3 US $162.50
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 5726 6AL5 audio amplifier HAM radio TV tubes RCA brand pair US $2.95
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 ARCTURUS 71A GLOBE TUBE BLUE GLASS D72 US $32.99 |
 6J7 AUDIO AMPLIFIER HAM RADIO TUBES RCA brand set of 4 US $4.95
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 GE 6SN7GTB 6SN7GT 6SN7 VT 231 VT231 black plate matched NOS quad US $33.00
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 6AU6 6AU6A AUDIO AMPLIFIER HAM RADIO TV TUBE RCA brand pair US $8.01
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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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 Realistic USA 7199 gold pin Grey Plate triode pentode strong NIB tube US $7.99
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 2 RCA Smoked 6V6 GT Tubes TEST STRONG US $22.00
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 RCA USA 5879 silver plate halo getter pentode strong well matched matched quad US $7.99
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 Amperex 7788 Halo Getter Premium Quality PQ pentode strong matched pair US $6.99
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![Western Electric 2C51 396A Dual Triode 12] Tested on Curve Tracer](http://www.bakmytunes.com/images/e/230791932679_0.jpg) Western Electric 2C51 396A Dual Triode 12] Tested on Curve Tracer US $4.95
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 1 RCA Red Base 5691 6SL7 Tube NEW IN BOX US $51.99
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 Raytheon Tungsram Grey Plate 6AQ8 ECC85 twin triode strong matched NIB pair US $7.99
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 NOS WIZARD 201A TUBE NIB D63 US $12.00 |
 Mullard Amperex e182cc 7119 pair 12AU7 tubes US $52.01
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 1 Sylvania 6V6 GTA Tube TESTS STRONG US $10.99
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 RCA RADIOTRON UV 201A BRASS BASE TUBE RAINBOW GLASS D62 US $30.89 |
 1 Telefunken ECC82 Tube 12AU7 TESTS STRONG US $22.30
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 2 PHILCO 01A GLOBE SHAPED TUBES D61 US $12.50 |
 WESTERN ELECTRIC VT 25 TUBE C31 US $36.00 |
 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 |
 2 SYLVANIA VT 25 A TRIODE TUBES C18 US $59.00 |
 4 NOS AMPEREX 6DJ8 TUBES NIB TEST GOOD D43 US $43.60 |
 6SL7 WGT LOT OF 2 USED SYLVANIA TUBES TESTED 6SL7WGT US $17.00
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 1 Fisher Telefunken ECC83 Tube 12AX7 TESTS STRONG US $20.00
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 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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 6SL7 GT LOT OF 3 USED SYLVANIA ROUND PLATE TUBES TESTED 6SL7GT US $21.50
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 4 NEW IN BOX GE 6Z10 6J10 COMPACTRON TUBES US $9.95
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 6SL7 GT VT 229 LOT OF 2 USED SYLVANIA ROUND PLATE TUBES TESTED 6SL7GT VT 229 US $19.00
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 Genalex KT66 smoked glass brown base with orig box tube US $69.86
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 6L6 VT 115 LOT OF 4 USED RCA TUBES TESTED JAN CRC 6L6 VT 115 US $15.00
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 5R4 GY LOT OF 2 RCA USED ST TYPE TUBES TESTED 5R4GY US $15.51
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 4 NEW IN BOX GE 6AY3B 6BS3A DIODE TUBES US $9.95
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 Matsushita 25hx5 Vacuum Tube US $.99
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 EIMAC 4 400b 400 B TUBE US $29.95
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 5U4 GB LOT OF 10 USED RCA TUNG SOL TUBES TESTED 5U4GB US $18.95
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 Telefunken Germany EL34 dual getter pentode strong matched pair one NOS US $152.50
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 2 Valco E83F Vacuum Tubes Numbers 3349 3350 US $.99
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 TESTED RCA 845 VT 43 HIGH POWER AUDIO AMPLIFIER TRIODE US $63.60
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 USED TESTED TAYLOR TUBE 805 VT 143 HIGH POWER AUDIO TRIODE US $9.99
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 B K Dyna Quick Model 700 Tube Tester Chart Instruction book Supplement sheet US $14.50
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 MULLARD GZ37 CV378 U54 MILITARY RECTIFIER FROM BLACKBURN LANCASHIRE GT BRITAIN US $100.00
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 5 NEW IN BOX WESTINGHOUSE 6JU8A RADIO TUBES 6JU8 US $9.95
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 VINTAGE RCA 2A3 VACUUM TUBE US $16.66
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 Marshall Electronics 6350 Vacuum Tubes New in Box Set of 4 US $25.00
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 5 NEW IN BOX SYLVANIA 17JQ6 POWER PENTODE TUBES US $12.95
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 An EICO Tube Tester Model 625 US $47.00
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 A PAIR OF VINTAGE RCA 6V6 VACUUM TUBES US $9.99
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 VINTAGE NOS RCA VT 212 ACORN VACUUM TUBE JRC 958 A US $4.99
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 VINTAGE TUNG SOL 5V4GA VACUUM TUBE US $4.99
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LCOS projection technology compared with LCD projection technology - overhead projectors, office equipment - office supplies industry
Projection technology today has become increasingly mature. According to the different projection core technology can be divided into CRT (cathode ray tube) projectors, LCD (liquid crystal) projector, LCOS (liquid crystals) projection, and DLP (digital light processor) projection of four main types. Which, CRT and LCD projection technology by transmission type projection method, while the DLP and LCOS projection technology uses reflective projection means. The current mainstream market Projector Is a DLP projection technology using LCD and projector.
Projector market in the late 20th century occupies the main position of the CRT (cathode ray tube) projector technology, almost all of the early projector using this projection. But now it is already being LCD, DLP, LCOS projectors and other new technology instead.
LCD projection technology is the light through the optical system formed by spectroscopic red, green and blue beams of light were transmitted through the red, green and blue liquid crystal panel and after analog / digital signal conversion, by controlling the liquid crystal panel LCD unit opening and closing to control light off road, red, green and blue color light in the prism of the last cluster, projected by the projection lens to form color images on the screen.
DLP projection system a bit complicated, the core is the digital micromirror device DMD chip. Its principle is by controlling the micro-lens is tilted to the light of different angles, to control the light reflected to the lens, thus creating an image. DMD DLP chip, according to the number used is divided into two single-chip and three chips. General single-chip DLP projector is, that there is only one DMD imaging components; three-chip DLP projection technology can achieve very high or very high image quality, brightness, but the cost is high, so now most of the DLP projector market machine is a single chip.
LCOS is a new type of reflective LCD projection technology, which uses liquid crystal coated silicon CMOS integrated circuit chip as a reflective LCD substrates, polished with advanced technology as a post-plated aluminum mirror, the formation of CMOS substrate, then the CMOS substrate and contains a transparent electrode on glass substrate with lamination, then into the liquid crystal packages. Mainly by the halogen light source, xenon lights, LED light, set light to the panel, the panel of the image projected by the reflection or transmission image, and then after splitting, combined optical system, and finally the image projected onto the screen imaging.
[LCOS projection technology compared with LCD projection technology] Exquisite high-resolution images
LCOS chip has a higher aperture ratio and a more fine pixel pitch. This makes the screen LCOS smaller the distance between pixels, the picture looks more distinctive uniform. LCD projection technology has obvious grid phenomenon. This projection screen features large in the projection is particularly evident when.
Optical efficiency LCOS chip, high aperture ratio will in itself enhance the efficiency of the optical projector. High aperture ratio means more chip area involved in light reflection. Also, because the special structure of LCD projection liquid crystal optical chip demand, further weakening the LCD's optical efficiency. Therefore, the same bulb with LCOS and LCD projectors in the effect of higher brightness than can be achieved. This is not only to improve the picture quality, but also can save more energy.
Outstanding black By transmission technology, LCD projection technology projection, display color, whether or not requirements are beyond the control of liquid crystal chip zero transmittance. This makes the perfect presentation of LCD projection technology can not be a black screen effect. However, LCOS projection technology was able to significantly restore the projector to improve the performance of the black. Excellent black and gray effect to LCOS projector brings more rich and delicate grayscale expression. Make more real image details, natural, with three-dimensional.
For showing motion pictures LCOS projection technology in motion picture display has some advantages. As a result of special reflective optics, thinner liquid crystal layer can be done, it can reduce the viscosity of liquid crystal molecules role in making sports screen respond more quickly, clearly, to develop a more fluid picture. That is why single-chip DLP LCOS can use a similar image as one of the reasons the timing.
Integrated in terms of LCOS high resolution, color, gray scale excellent, deep black, bright screen, grid is much less and more energy-saving features. By contrast LCD projection screen grid, black impure and utilization of the bulb is less obvious expenses.
[LCOS projection technology and DLP projection technology more]
And today most of LCOS projector on the market are compared with three-chip structure, DLP projector camp slightly complicated products.
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