![]() ![]() The slotted line is a (rigid) continuation of the coaxial transmission lines. Reduced height waveguide tuner for impedance matching United States Patent 5910754 Abstract: A slotted line tuner, also capable of operation as a fully automated tuner, to provide arbitrary termination in high frequency waveguide media for use with frequencies of interest between GHz is disclosed. 2-Knob Stratocaster) and the American Standard Stratocaster, unveiled in 1987, were both fitted with the new version of the not-slotted Deluxe Schaller Keys. In this lab you will learn how to characterize and use a 50-ohm slotted line, crystal detector, and standing wave ratio (SWR) meter to measure an unknown impedance. Although the hardware of the Strat was gold-plated, the tuning machines of the first Strat units were chrome-plated probably due a delay in refilling the gold-plated keys. The 1980 Strat featured the not-slotted Deluxe Schaller Keys, which ported the brand name “Fender” stamped on the back shell. The reason why Fender later equipped this Stratocaster with the same Schaller tuning machines used for the Strat is not known. The 1979 25th Anniversary Stratocaster was fitted, at first, with the not-slotted Sperzel Non-Locking Tuners (the locking tuners were introduced by Sperzel only in 1983), which featured the word “Fender” stamped on the back shell. Kluson brand was purchased in 1993 by Larry Davis of WD Music Products. Since the Kluson company went out of business, the Vintage Reissue Stratocasters were fitted with Kluson-style replicas made by the Japanese Gotoh company. GERMANY”.įender used this type of key on most Stratocasters until 1983. Although designed in Fullerton, the gear inside the shell of the Fender keys second issue was stamped with “MADE IN W. At first, they were characterized by a side tuner shaft worm gear hole, but since circa 1975 they gradually switched to a closed shell, without a protruding shaft. These tuning machines were slightly modified over time. Regardless of how things went, Kluson tuners were gradually discontinued and replaced by the so-called Fender keys in the course of 1967, characterized by an octagonal chrome-plated plastic button and the “F” (for Fender) marking stamped on the back of the cover. Forrest also claimed that Schaller, the German company, copied his design in making some of their keys. SCIENCE INSTRUMENTS 517 SLOTTED LINE TUNER RF MICROWAVE LAB Item must be returned within: 30 Days Restocking Fee: No Refund will be given as: Money Back. The gear-hobbing machines were set up in Race and Olmsted’s Tool & Die shop, which made the parts for Fender because the machines had to be operated by trained machinists, and Fender didn’t have employees with that particular skill. One adjustment tunes the double stub tuner to obtain a voltage standing wave ratio of 1.03 to 1 over the. However unlike the typical design, the slotted-ground transmission requires no additional metal layer. Forrest White stated in his book that he had the idea of the design of new keys that would be mounted easily on the six-in-a-row headstock with the use of two screws.Īccording to Forrest, Fender bought West German gear-hobbing machines to make the gears for the keys they wanted to make. Waveguide Slotted Line Adjustment Table 9-1. Slotted lines are used for microwave measurements and consist of a movable probe inserted into a slot in a transmission line. Please note: If you are retro-fitting a vintage left-handed instrument that has been modified or putting this vintage style tuning machine on a modern instrument you may also need to purchase the part # MB65N-L US - adapter bushings to convert a larger size peghole to vintage size to allow for proper fit and function.When CBS bought Fender, one of the first things Don Randall wanted to do was to make their own tuning machines, thus avoiding buying the Klusons. Sold by Instrument Alley and ships from Amazon Fulfillment. This item: Grover 406G6 Mini Self Locking Rotomatic Tuner, 6-In-Line, Gold. ![]() See below for any historic period-correct replacement info. 18:1 Gear Ratio for ultimate precision tuning. Although the large sections are cast & machined aluminium it still weighs a hefty 18 lbs. (part#MB65N US) and mounting screws (TMSC) needed for installation. A slotted line section should be a minimum of about half-a-wavelength long so, to reach the low limit, the instrument has a slotted section 450 mm long and is about 26 long overall. This set comes complete with 6 treble side tuners, 8.8mm O.D. ![]() The housing and button style are period correct for 1956 - 1964 production dates. Place the slide-screw tuner between the slotted line and the unknown impedance, as shown in the figure below. This Kluson¨ 6-in-line tuning machine set for left-handed instruments has oval metal (butter bean-shaped) buttons and the improved 15:1 gear ratio for more stable and accurate tuning. ![]()
0 Comments
Leave a Reply. |