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Celestron OTA Overstock Sale! Save 209 for a limited time!Celestron 8" Schmidt- Cassegrain Optical Tube AssemblyThe Celestron C8 OTA features patented Starbright XLT coatings for maximum performance. Visual back allows for use with 1.25" accessories.The Celestron C8 optical tube assembly is equipped with a 6x30 finderscope to help accurately find objects and a star diagonal provides more comfortable viewing position when observing objects that are high in the sky.Includes dovetail rail compatible with CGE Advanced Series mount.

The extra-strong, economical Max-Strength 8-Year in-ground pool covers are made from the highest quality polyethylene with your typical black underside to prevent algae growth. The pool cover itself is Navy Blue in color. Triple Laminated High Density Polyethylene Fabric which offers optimal U.V. protection. The triple laminated inner scrim is coated with a weather- resistant substance which resists acid, alkalis, salt, mildew, chlorine, and temperatures as low as -50F! Extra-Durable Water Tube Loops which are fitted every 4? so that water tubes are held securely! Heat Sealed Seams which are more resistant to tearing and are less likely to allow water seepage into your pool than traditional sewn seams! An 8 year warranty (2 years full) from a company that has been selling pool covers for over 20 years!

The Groove Tubes SAG-AX7-MPI Matched Phase Inverter Tube Changing Kit consists of specially selected and matched 12AX7 vacuum tubes for critical audio or guitar/bass amplifier use. They're intended primarily for matching the two sides of the triode for phase inverter or driver use.The Groove Tubes AX7 tube is a dual triode where the A and B sides are closely matched for use in critical high end audio applications or for use in the phase inverter or driver position of musical instrument amplifiers.The benefit of this tube in a guitar or bass amplifier is a matched output section. At lower frequencies such as dropped tunings, 7 string guitars, or bass guitars, the upper and lower portions of the output waveform will be much more equal. When this waveform is not equal, differences are cancelled out in the NFB loop of class A/B amplifiers and are noticed as a lack of sustain or apparent "dead spots" in areas of the fret board.At high levels at all frequencies, sustain will be improved. This is even more critical in Class A amplifiers such as the Vox AC-30 and Matchless amplifiers.Use this MPI in any application where a phase inverter / driver of the ECC83/12AX7/7025 tube is specified. The phase inverter / driver position of a guitar or bass amp is a current driving position, and not part of the tone generation stage. These tubes are selected for specific characteristics, so may be a 12AX7R, 12AX7C, 12AX7M or another 12AX7 type that has been selected for specific curve traces as the objective. One can not specify the tube type desired. If you want a specific type matched as an MPI you need to order the tube and then add the SAG labor charge on top of the tube. The stocked MPIs are generally made from 12AX7C, 12AX7R (WC and NOT WA) and the new 12AX7M. Any of these tubes may be supplied as they are matched for specs and vacuum tube curve traces and not for tube type.Use of a 12AT7 in place of a 12AX7 will yield more clean headroom in your output section. The

THE ULTIMATE CONVERSATION PIECE! Show your nostalgic fondness for yesterday's technology with a Nixie tube clock. It is rather ironic that in their heyday the use of Nixies was considered too expensive for consumer products like clocks and here we are today! The unmistakable soft orange glow and the remarkable fade display feature in an incredibly beautiful hand rubbed teak and maple base! Then the mere discussion of Russian tubes made during the cold war, with an upside down "2" as a "5"... It just doesn't get any better than that! Get on the retro bandwagon with your very own Nixie classic clock! The IN14TM Features six IN14 Nixie tubes mounted in a beautiful hand crafted Teak and Maple base. The base finish is hand rubbed varnish and linseed oil. The Hours, Minutes, and Seconds are separated by an NE2 Neon bulb matching the era of the clock. Advanced features include brightness control and auto-dim. From the two setting buttons you can increase or decrease the brightness of the Nixies from 0 (off) to 10 (full brightness). You can also set the clock to lower the brightness between two specified hours in the day (such as 08 to 17 when you are not home) to extend tube life or to customize your display for nighttime use. The IN14 is powered by a provided 110VAC to 12VDC power supply, and utilizes a crystal oscillator for the time base that is accurate to 20ppm. A simple calibration procedure can achieve an accuracy even better than 10ppm! The IN14 can be used overseas the optional PS15U power supply. It can also be used with a 12VDC source. Measures 8.25"W x 3"H x 4"D.

6L6 Type Large Fender AmpsThe Choice of most all medium powered Fender amps, and the many Fender 'wantabe' amps. This specially designed pentode with a beam forming electrode was invented by RCA and has many variations available. It's response is rounder, with a more pronounced midrange character, very chesty and very old time rock 'n' roll.GT-6L6BPerhap s the most reliable of the currently made types, with slightly less power and a more aggressive edge when pushed into distortion. Currently used for the GT Fender amp tubes.GT-6L6CNew model, large straight bottle like Sylvania STR tube of the late 70's. High power, crisp tone with solid tight bass, great for Rock or Country, excellent value with more power and less cost than 6L6B (5881) Russian type.GT-6L6CB'Coke Bottle' glass. Higher power, great for round vintage tone. Lightweight construction, shorter life expectancy, also means costs 1/3 as much. Favorite with blues players because of its soft touch, easily 'pushed' into distortion.The Groove Tubes Process - Step by Step Testing and Selecting Tubes.Groove Tubes literally goes through thousands of tubes, rejecting more tubes than they accept. They put every tube through a rigorous performance test, one at a time, in real amp circuits. The preamp tubes are rejected for adverse microphonics, low output or high noise. Power tubes are more involved, and they go through additional testing. Here's what they're looking for:Grid Leakage. Causes tube to burn out quickly, and worse yet, to short out and wreak lots of havoc. They throw these tubes out.Weak Vacuum. Tube will act deceptively normal, then just burn out on you (usually at the worst time!). These tubes don't make it past the first round.Gain to Distortion Ratio. The center of all Groove Tube magic! This

Note: This is a kit, assembly and soldering is required! THE ULTIMATE CONVERSATION PIECE! Show your nostalgic fondness for yesterday's technology with a Nixie tube clock. It is rather ironic that in their heyday the use of Nixies was considered too expensive for consumer products like clocks and here we are today! The unmistakable soft orange glow and the remarkable fade display feature in an incredibly beautiful hand rubbed teak and maple base! Then the mere discussion of Russian tubes made during the cold war, with an upside down "2" as a "5"... It just doesn't get any better than that! Get on the retro bandwagon with your very own Nixie classic clock! The IN14TM Features six IN14 Nixie tubes mounted in a beautiful hand crafted Teak and Maple base. The base finish is hand rubbed varnish and linseed oil. The Hours, Minutes, and Seconds are separated by an NE2 Neon bulb matching the era of the clock. Advanced features include brightness control and auto-dim. From the two setting buttons you can increase or decrease the brightness of the Nixies from 0 (off) to 10 (full brightness). You can also set the clock to lower the brightness between two specified hours in the day (such as 08 to 17 when you are not home) to extend tube life or to customize your display for nighttime use. The IN14 is powered by a provided 110VAC to 12VDC power supply, and utilizes a crystal oscillator for the time base that is accurate to 20ppm. A simple calibration procedure can achieve an accuracy even better than 10ppm! The IN14 can be used overseas the optional PS15U power supply. It can also be used with a 12VDC source. Measures 8.25"W x 3"H x 4"D.

Groove Tube 12AT7 Pre-Amp Amplifier Vacuum Tubes make your tube amp tone shine like it's new again!Electric Guitarists both yesterday and today can be linked by one piece of equipment: The tube amp. With all the strides in transistor amp technology, guitarists still prefer tube amps. Why do tube amp designs sound and feel differently from solid-state? Simply, tubes work differently. Preamp tubes are used in the first, low level stages of tube amps. There are many designs that will interchange and each has its own tone, gain, and response. These may be interchanged without any modification to the circuit... user friendly, so experiment! Groove Tubes are durable and great for most US made amps, especially Fender. Use new tubes to get a cleaner brighter tone from your amp.Note: Preamp tubes should be changed every time power tubes are replaced for best performance! Groove Tube preamp tubes are warranted to be free of burn out, excessive noise or micro-phonics for 180 days from date of purchase.What Is A Tube?A tube is an electronic device consisting of a minimum of four active elements: a heater (filament), a cathode, a grid and a plate. All sealed in a vacuum glass enclosure to prevent parts from burning. Once heated, the cathode begins to emit electrons, which flow from the cathode (which is negatively charged) toward the plate (which is positively charged). The grid's purpose is to control this flow, in effect, acting as a valve.How Do Tubes Work?When the guitar's pickup produces a small voltage (the result of the string vibrating in the pickup's magnetic field), this signal is applied to the grid, which causes a large current flow from the cathode to the plate. Because of this, a correspondingly large voltage now appears at the plate. A portion of the amp's electronic circuitry, the grid bias control, adjusts the pr

The Groove Tubes SAG-MHG Marshall High Gain Kit contains 2 SAG ECC83S and 1 AX7-MPI tubes optimized for the preamp stage of Marshall-style amplifiers. Specially selected from premium Groove Tubes preamp tubes that have been tested to meet the GT standard. Special Applications Group (SAG) provides further testing and grading of vacuum tubes for certain performance characteristics. This 3-tube set is optimized for your Marshall, Bogner, Rivera, Mesa or British-type amps which use (or will benefit from) the ECC83 (12AX7) preamp tubes. SAG-MHG includes two high output preamp tubes to be used in the V1 and V2 positions, and one MPI (matched phase inverter) tube for the V3 position. The matched phase inverter may be a 12AX7 or an ECC83, as it will be matched for its response curves with the other two tubes. The phase inverter is not part of the tine generation stage, it is a current driver.The V1 and V2 tubes will increase the front end output structure of amplifiers from about 10% to as much as 25% or more over typical stock tubes.The V3, matched phase inverter tube will assure a balanced output section when used with matched power tubes (highly recommended) which will assure sustain across the entire range of your instrument.The MPI (Matched Phase Inverter) is a SAG selected 12AX7 or ECC83, as this tube is not part of the tone generation stage, but part of the output section and is chosen for its current drive and rise time characteristics. Use this MPI in any application where a phase inverter / driver of the ECC83/12AX7/7025 tube is specified. The phase inverter / driver position of a guitar or bass amp is a current driving position, and not part of the tone generation stage. These tubes are selected for specific characteristics, so may be a 12AX7R, 12AX7C, 12AX7M or another 12AX7 type that has been selected for specific curve traces as the objective. This tube cannot be specified as to type in the kit.These kits also work particularly well in Fender Blackface and Silve

airhead bungee tube tow ropeadd a little extra zing and excitement to your tubing! this 9/16" x 50 ft. tube rope has a 3/8" diameter bungee cord spliced inside. its rated at 4150 pounds tensile strength conforming to wsia recommendations for 1 - 4 rider tubes. youll enjoy brief surges of speed as the bungee stretches and contracts. it reduces wear and tear on tubes and riders too by absorbing sudden jerks from slack in the line. a rope keeper is included for convenient storage. product : kwik tek airhead bungee tube tow rope - 50ft manufacturer : kwik tek / dry pak manufacturer part no : ahtrb-50 upc : 737826018451

solar led tube lighting is ideal for lining walkways windows trees gazebos architectural details stairs deck railings and any other outdoor object you can think of. solar tube lights help reduce expensive electrical bills by harnessing the suns power. solar led tube lights eliminate the inconvenience of messy wires or nearby outlets. tube lights will stay illuminated for 10 to 16 hours depending on lighting conditions and turn on and off automatically via the built-in light sensor. the 102 tube lights are extremely bright green led lights that make a definite night time statement and are rated at over 100 000 hours of life. includes tube light string rechargeable ni-mh batteries solar cell electronics box mounting brackets and instruction manual. end to end it measures 39 feet. light to light it measures 33 feet with a lead of 6 feet.

solar led tube lighting is ideal for lining walkways windows trees gazebos architectural details stairs deck railings and any other outdoor object you can think of. solar tube lights help reduce expensive electrical bills by harnessing the suns power. solar led tube lights eliminate the inconvenience of messy wires or nearby outlets. tube lights will stay illuminated for 10 to 16 hours depending on lighting conditions and turn on and off automatically via the built-in light sensor. the 102 tube lights are extremely bright red led lights that make a definite night time statement and are rated at over 100 000 hours of life. includes tube light string rechargeable ni-mh batteries solar cell electronics box mounting brackets and instruction manual. end to end it measures 39 feet. light to light it measures 33 feet with a lead of 6 feet.

FDA CFR 21 Compliant These disposable polystyrene tubes feature molded graduations. Nonsterile. Not autoclavable. Color: natural. Volume: 15 mL Maximum RCF: 1500 g Dimensions: 18O.D. x 120L mm Ordering Information: Tubes 21008-000 are packaged in partitioned boxes of 100. Tubes 21008-035 are bulk packed. Low-density polyethylene caps are sold separately and packaged in bags of 500.

Automatically maintains the 70% humidity levels required to keep cigars at their freshest. The humidification process is actually controlled by the nontoxic chemicals we charge into the Crystals in the factory. You never have to add anything but plain distilled water again. The crystals swell up when they have water in them and shrink when they need more, takes all the guess work out of it. The size is perfect to stash a few in different parts of your humidor. Priced per tube

Classic ribbon mic sound for vocals, horns, guitars, ensemble singers, pianos, string sections, and much more Class-A signal path electronics with GT6205M tube Rare Earth Neodymium magnet for hotter signal output than most classic and modern ribbons Figure-8 polar pattern Specially designed pre-tensioned field interchangeable ribbon assembly for easy replacement if ribbon becomes damaged Custom-wound Cinemag transformer Satin finished stainless steel body Frequency response: 20Hz-16kHz +/-3dB 138dB maxiumum SPL Includes aluminum storage case, PF-3 magnetic- mounting pop filter, HM1 swivel hard mount, SM4 shock mount, power supply and multi-core cable

Classic ribbon mic sound for vocals, horns, guitars, ensemble singers, pianos, string sections, and much more Class-A signal path electronics with GT6205M tube Rare Earth Neodymium magnet for hotter signal output than most classic and modern ribbons Figure-8 polar pattern Specially designed pre-tensioned field interchangeable ribbon assembly for easy replacement if ribbon becomes damaged Custom-wound Cinemag transformer Requires 48V phantom power for operation Satin finished stainless steel body Frequency response: 20Hz-16kHz +/-3dB 138dB maxiumum SPL 75 or 300 ohms selectable impedance control Includes aluminum storage case, PF-3 magnetic- mounting pop filter, HM1 swivel hard mount and SM4 shock mount,