2016 Latest Design Aluminum rod to Moldova Importers

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Every member from our high efficiency sales team values customers' needs and business communication for 2016 Latest Design Aluminum rod to Moldova Importers, Welcome to build the well and long standing business relationships with our company to create a glorious future together .customers' satisfaction is our eternal pursuit

Aluminum rod

1.Surface:mill finished, anodized



4.Length:cutting according to customer’s request

5.Mould:made according to customer’s drawings or sample


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  • Animated video showing three types of straightness measurement for industrial applications using LAP STRAIGHTNESS CHECK. Varying measurement principles: laser triangulation, micrometers (shadowing method) and laser light section. Typically used in production of long products, like in rolling mills, steel tube production and similar processes (STRAIGHTNESS_CHECK_ani_en_1-0_2015-06-24_full_HD).

    Step-by-step instructions for making a tunable crystal radio. This is a radio that gets its power from the radio waves. I made it almost entirely from junk except for the diode (1N34 germanium diode) and the earpiece (though you can use a speaker from a phone instead.) The capacitor is made from aluminum foil and a paper towel roll. The coil is rolled on a toilet paper roll. The wire is enameled magnet wire. For the antenna I use a 15 foot wire laid out on the floor. For the earth ground I connect a wire to the ground in the household wiring.

    I originally got this circuit from the book “Radio Receiver Projects You Can Build” by Homer L. Davidson.

    For this circuit, the diode must be germanium. The following is a partial list of germanium diodes that should work:
    1N34A, 1N60, 1N91, 1N119, 1N270, 1N277, 1N283

    The following are not germanium diodes and may need a long antenna or a powerful radio station nearby to work:
    1N4148 (silicon, found on a lot of circuit boards), B16 (zener diode), 1N5060 (avalanche diode)

    The crystal earpiece (piezoelectric earphone) and/or 1N34 germanium diode and/or air core variable capacitors can be ordered from most of these sources:


    http://www.scitoyscatalog.com/category/R.html (their variable capacitor is for if your coil has a ferrite core and is smaller than the one in this video)


    You can find the circuit diagram shown in this video on this page:


    See also:

    How a Crystal Radio Works

    Crystal Radio Troubleshooting and Tips

    Make Crystal Earphone/Earpiece for Crystal Radio

    Use Earbuds/Earphones with Crystal Radio

    Make a Crystal Radio Coil with Taps

    Make Razor Blade Diode for Crystal Radio/Foxhole Radio

    How to Make Crystal Radio Amplifier for Speaker

    How to Make Amplifier for Crystal Radio Earphone

    Steps for How to Make Amplifier for Crystal Earpiece

    How to Make an AM Radio Transmitter (so you can transmit to your crystal radio)

    Amplitude Modulation with Simple AM Radio Transmitter

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    - http://rimstar.org

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