circuit meke anten for gold

Build a Magnetic Loop Antenna Controlled by Arduino

Apr 20, 2020Magnetic loop antenna tuner circuit diagram (click to enlarge) Besides the Arduino board U1, the schematic contains the the blocks listed down below. Battery charger (D1, R1 to R3, BT1 to BT4): this is a simple circuit for charging the battery pack consisting of 4 NiMH cells. Get price

How to Calculate VHF Radio Antenna Length

Apr 12, 2017In radio frequency (RF) terminology, the Very High Frequency (VHF) range is the signal spectrum from 30 to 300 megahertz (MHz). To receive a specific VHF signal, you simply need a dipole antenna. Comprised of two lengths of wire or other conductive metal, a dipole antenna's shape allows the incoming signal's Get price

Circuit Boards Buyers

We buy circuit boards from any device and pay you for the precious metals (such as gold, platinum, silver, and palladium) found within them.We buy circuit boards from computers, cell phones, telecommunication equiptment, servers, military equiptment, car electronics and many other sources. Get price

Build A 9 dB, 70cm, Collinear Antenna From Coax

Recently the RASON technical committee was hard at work at the repeater site repairing our 2 meter repeater antenna. One of the members commented to me that I should write an article about collinear arrays so that we could all build our own. While it is not always feasible to home-brew a commercial quality antenna designed to take hurricane force winds, it is very feasible to built a collinear Get price

Antenna design guide for MFRC52x, PN51x and PN53x

Antenna Topology II needs to be applied. This is the starting point of the selection guide. This means, all indicated protocols can be supported by the following antenna topologies. Antenna Topology II resolves stro ng detuning effects on the matching circuit. Antenna Topology III has the same physical constraints as the asymmetric Get price

Amazon: Cricut Maker, Champagne

Introducing the ultimate smart cutting machine. With its expandable suite of tools and advanced Rotary and Knife blades, Circuit Maker gives you the freedom to make virtually any DIY project. Circuit Maker cuts hundreds of materials, from the most delicate fabric and paper to mat board and leather. Get price

PCB Gold Fingers – Specifications What You Should Know

Dec 05, 2018PCB Gold Finger Beveling. On a circuit board, the PCB gold finger plating process is used after the solder mask and before the surface finish. The plating process generally consists of the following steps: Nickel plating: Between three and six microns of nickel are plated first to the connector edges of the fingers. Get price

Building your own antenna isolators

This circuit is a simple isolator for TV and Radio antenna connection. This circuit passes radio frequency signals nicely, but does not pass significantly 50 Hz signals, so the ground loop is eliminated. The circuit can be easily built into antenna connector or to a small box. I would recommend to use small metal box, where you connect one of Get price

Circuit Board Recycling

Jan 06, 2015Gold is one of the most commonly found precious metals in integrated circuit boards, as it is an excellent conductor of electricity and is highly resistant to corrosion. Additionally, printed circuit boards may also contain other valuable metals – silver, platinum, palladium, copper and nickel – thatcan be extracted from them and reused to Get price

Satellite Signal Strength Meter Circuit

Jan 10, 2020Keep the receiver switched ON so that DC from the receiver is able to reach and power up the signal meter circuit as well as the LNB. Now direct your dish position approximately toward the satellite zone in the sky, let your favourite tracking program get involved in the set up for determining the compass heading time at occasions when the sun attains identical direction (azimuth) with the Get price

Build Your own VLF Receiver

A resonant, full wavelength antenna is much longer than 60 feet. In fact, a full-length VLF antenna would be about 60 MILES long! A small antenna produces very little signal current for reception, however, a high gain, high impedance amplifier can make up for the difference. Get price

Electronics

This is an UHF band TV antenna preamplifier circuit With 15dB gain to build easily. It is formed based on BF180 UHF Transistor. The first stage is an band pass filter constructed by the C1, CV1, L1, L4, C7 and C3, the second stage is a base-common voltage amplifier with low input impedance to match. Get price

The AA8V 6AG7 Amplifier

The plate tank circuit is a pi-network that matches the high impedance of the plate to the low impedance of the antenna. At the same time the circuit filters out undesired harmonics from the output signal. The signal from the plate enters through the 0.0047 uf plate coupling capacitor. The 100 pf plate tuning capacitor tunes the plate to resonance. Get price

How to Build Several Easy Antennas for Amateur Radio

Aug 11, 2019Dipole antennas often are the easiest to build, and then turned into inverted V antennas by raising the center of the antennas up into the inverted V style. It's a good idea to have your antenna at least one half ( 1/2 ) wavelength of the antenna. one quarter (1/4) wave is the minimum height above ground for effective performance. Get price

How does a chip antenna work?

Dielectric resonator antennas, commonly referred to as chip, work by creating a standing wave of electrical field of a given frequency.Technically, it is a cavity resonator where the cavity between conductive surfaces is filled by the ceramic core. The actual oscillation mode will be defined by the geometry of the antenna. In the simplest case, the geometry will be two parallel plates spaced Get price

Where Is the Gold Hiding in Your Old Computers? — Reclaim

Feb 13, 2014Shown: gold-plated circuit boards that Specialty Metals customers have shipped to us for recycling and refining at the best prices. Motherboards – the biggest circuit boards inside both laptops and desktops – often contain the "mother lode" of gold in used computers. Their edges have gold contacts and connectors where wires slide on. Get price

How Much Gold is in Smartphones and Computers

Mar 20, 2013[With gold selling for about $1,580 per ounce, that would yield $15,800.] How about a laptop? Magann: Two hundred laptops would yield five troy ounces of gold. How much is in an average desktop? Magann: A PC circuit board, where the gold is, weighs about a pound. If you had a ton of those boards, you should have 5 troy ounces of gold. Get price

Reclaiming precious metal from circuit boards, etc.

Nov 20, 2011Wherein I do refine gold using aqua regia process. After reaction in aqua regia, gold is precipitated by SO2 gas or Na-metabisulfide. I'm getting the gold in powder form. but the problem I'm facing is I'm not getting the desired output. i.e the problem is if I have 10 kgs of 99.5 gold which is to be refined to 99.99 to 99.9 depending on Get price

Circuit Board Parts

At the top, the antenna and antenna point sit apart from the rest of the circuit. Below the antenna point, you will find the transmitter and receiver circuits. Notable components in this area are: • Antenna switch. Located just below the antenna point, the switch has metallic and non-metal parts with 16 points or legs. Get price

14 Best Regenerative receiver with frame antenna images

This inexpensive FM radio receiver antenna booster uses the BF324 TO92 style pnp transistor in a grounded-base configuration. The circuit may be used as a signal booster with VHF receivers whose front end suffers from low sensitivity (such as many valved and army surplus types). The frequency range of Get price

How to Make a Ring From Old Gold

Roll the molded gold through a rolling mill until the sheet or wire is the gauge you need to make your ring; 18-gauge gold sheet or 14-gauge wire are good sizes to create a ring. Wrap the 18-gauge gold sheet or 14-gauge wire around a ring mandrel to form the gold into the shape of a ring. Use a forming hammer to round out your ring. Get price

Checklist of Old Electronic Devices that Contain Gold

May 26, 2017Old laptops and desktops – Big old desktop computers are about as useful as doorstops, but they still contain small quantities of gold. Pile them up, call us up, and we can explain how to recycle them profitably. And don't forget that gold can be found on printed circuit boards, modem cards, graphics cards, memory chips and other extras that got stuffed into these old machines. Get price

GRC: Easy antennas

For MW and LW, this is a ferrite rod antenna built inside. For FM and SW, one usually finds an extendible whip antenna. The Short Longwire Antenna To make the most simple antenna, but already very effective for old valve radios, just take a single-lead insulated wire of 2 to 3 meters in length and fix a banana plug on one side. Get price

Lecture 32 Circuit Properties of Antennas

Receiving Antennas: Thevenin Equivalent Circuit P out Z o x z d θ Make a Thevenin equivalent circuit for the receiving antenna • The Thevenin impedance Z th is the impedance looking into the antenna and is therefore the same as the antenna impedance Z A • V th is due to the the radiation power received by the antenna and is something that Get price

JOINtenna Antenna Signal Combiner

Channel Master's Antenna Rotator has served as a solution to this problem for many years and while it allows the user to only use one antenna, the installation and user experience can be more complicated. If looking to avoid the installation of an antenna rotator by using two antennas, the Get price

Efficient Antennas for Terahertz and Optical Frequencies

Figure 1.1: (a) 160 nm-length gold dipole antenna with diameter of 10 nm and the gap size of 3 nm filled by vacuum, (b) and (c) field magnitude (complex electric field) along Figure 3.5: Equivalent circuit of the bowtie antenna loaded with InGaAsSb load in Get price

How Metal Detectors Work

Mention the words metal detector and you'll get completely different reactions from different people. For instance, some people think of combing a beach in search of coins or buried treasure. Other people think of airport security, or the handheld scanners at a concert or sporting event.. The fact is that all of these scenarios are valid. Get price