[DOC] [TLE] Crystal radio - Wikipedia [PAR] For crystal-controlled oscillators (as used in radios), see Crystal oscillator. "
Crystal set" redirects here. For the Australian rock band, see The Crystal Set. Boy 
listening to a modern crystal radio. A crystal radio receiver, also called a crystal 
set or cat's whisker receiver, is a very simple radio ... Early radio telegraphy used 
spark gap and arc transmitters as well as... [DOC] [TLE] Chapter 4: Radio - Sci-Toys.com [PAR] Our first radio used a telephone handset for an earphone, and that works quite 
well. ... To make piezoelectric earphones easier for our readers to find, we now 
offer them in our ... namely that it works at lower voltage levels than most other 
common diodes. ..... We can control the frequency of the oscillations in two ways. [DOC] [TLE] Quartzose | Define Quartzose at Dictionary.com [PAR] or in crystals (as rock crystal, amethyst, citrine, etc.) ... It is piezoelectric and used 
to control the frequencies of radio transmitters. ... A hard, transparent trigonal 
mineral that, after feldspar, is the most common mineral on the surface of the 
Earth. [DOC] [TLE] Quartz | Define Quartz at Dictionary.com [PAR] or in crystals (as rock crystal, amethyst, citrine, etc.) ... It is piezoelectric and used 
to control the frequencies of radio transmitters. ... A hard, transparent trigonal 
mineral that, after feldspar, is the most common mineral on the surface of the 
Earth. [DOC] [TLE] Piezoelectricity - HyperPhysics [PAR] Quartz crystals are used for watch crystals and for precise frequency reference 
crystals for radio transmitters. ... Piezoelectric ceramic materials have found use 
in producing motions on the order of nanometers in the control of scanning... [DOC] [TLE] After Class: Crystals, April 1960 Popular Electronics - RF Cafe [PAR] Oct 8, 2012 ... All you need to do is substitute transistors for the tubes used in these ... Nearly 
everyone in electronics makes use of crystals every day - here's why these rock-
like plates play .... If you keep in mind that a crystal is intended to control 
frequency ... Structurally, the piezoelectric crystal used in radio transmitters... [DOC] [TLE] The Piezoelectric Effect - R/C Crystals - favonius [PAR] The frequency of the crystal is controlled by the thickness of the quartz slice ... In 
35MHz R/C equipment 3rd overtone receiver crystals are generally used ... 
piezoelectricity in the form of sparks and ball lightning as rock formations are ... 
Not all crystals can be used in all radio sets and receivers - you must check for 
yourself. [DOC] [TLE] Crystalline Silica Primer - USGS Mineral Resources Program [PAR] From the sand used for making glass to the piezoelectric quartz crystals ... 
Because crystalline silica is an extremely common mineral and the HCS will 
affect many .... been part of the rock that weathered to form the soil, it may have 
been ..... frequency control for radio transmitters and radio-frequency telephone 
circuits. [DOC] [TLE] PIEZOELECTRIC QUARTZ - cloudfront.net [PAR] the transmitters in all aircraft and tank radios have their frequencies controlled by 
... lI time intenals lUay use piezo-elec:trie quartz, but the. Imlk of such quartz is ... 
The only common substances which are piezo-electric are crystale of quartz ... 
crystal deposits are most likely to be found in or near granitic rocks. In Australia... [DOC] [TLE] A History of the Piezoelectric Quartz Crystal ... - SMARTech Home [PAR] Figure 21: Quartz Crystal Oscillator Circuit Used by the U.S. Navy, Circa 1927 ......
... 180 ...... shared technology in question; that is, their work on the common 
technology (quartz ... control as key patents, such as Edison's incandescent 
electric light patent or ..... greater frequency stability for its high-powered radio 
transmitters. [DOC] [TLE] Crystal Healing: Magical Cure or Just a Rock? | Science-Based Life [PAR] Sep 5, 2011 ... The control groups were based on real/fake crystals, not one group being ...... 
circuits, and to stabilize frequencies for radio transmitters and receivers. The most 
common type of piezoelectric resonator used is the quartz crystal... [DOC] [TLE] Hack Your

Question: This common rock is piezoelectric & is used to control the frequencies of radio transmitters
Answer: quartz