The micro-transmitter is a simple single-tube FM wireless microphone circuit, which is characterized in that the oscillating coil doubles as a transmitting antenna, has high transmission efficiency, is not easy to run in a non-interfering state, and is suitable for long-time work. The transmitter is only suitable for wireless microphones placed at fixed locations and is not suitable for handheld use. Otherwise, the oscillation frequency is easily affected by the human body and is unstable. Here is the transmitter circuit:
The circuit is powered by a 1.5V battery and consumes about 2~3mA. Therefore, the button battery can be used, and the body can be made smaller. Since the loop antenna L1 for transmission doubles as an oscillating coil, a high-frequency:current that resonates synchronously with the oscillating bub rate flows in the antenna, so that it is always in an optimum emission state. The transmission frequency falls in the ordinary FM radio frequency band for convenient reception. In the case of a high-sensitivity receiver, the transmission distance can reach more than 100 meters (open space).
The manufacture of the built-in loop antenna: a metal ring or a square shape is formed by using an enameled wire having a length of 160 mm and a diameter of 1 mm, and is embedded in the casing.
Debug: Adjust capacitor C3 so that the transmit frequency falls within the FM band between 88-108MHz for easy reception with FM radio. When debugging, do not put the hand near the transmitting antenna, and do not approach the metal object when it is placed, so as not to affect the oscillation frequency and the emission distance.
The triode must use UHF tubes, otherwise it will affect the emission efficiency and distance. The 2SC3355 UHF tube used here has a characteristic frequency of 6.5GHz and a power consumption of 600mW. The microphone MIC should use a highly sensitive electret microphone, which can be selected by a multimeter.
PCD Drills
PCD drills used to drill through holes or blind holes in solid materials and to ream holes in existing holes. Commonly used drill bits mainly include twist drills, flat drills, center drills, deep hole drills and nest drills. Although reamer and boring drills cannot drill holes in solid materials, they are customarily classified as drill bits.
Our customers can depend on us for prompt, efficient response and quality products that attest to our expertise in engineering and manufacturing. As part of our scrupulous inspection procedure, we test 100% of our drills .375" and under for assembly integrity, leakage, and specified oil flow.
FEATURE:
1.Hardness PCD blanks more than 5000HV.
2. PCD Stone Milling cutters is maily used for High efficiency milling and depth character engraving on underside, grooving areas with good surface Roughness.
3.Top quality as world leading manufactuers, high abrasive resistance and with long service life.
4.big quantity in stock for ordering
PCD carving tool
PCD drills
Flexible in order quantity:
Samples can be provided before mass production, and MOQ can be discussed accordingly.
PRODUCT DETAIL:
PRODUCTING PROGRESS:
PAYMENT AND DELIVERY:
PRODUCT EQUIPMENT :
ABOUT US :
We are specialize in manufacturing PCD diamond tools and Carbide tools. Our major product inclulde PCD Inserts , PCD Reamers , PCD End Mills, PCD Taps, Cabide Inserts,Carbide Drills, Carbide Reams, Taps etc.,
We also offered customized cutting tools per drawings, and provide package according to customer requirements. We manufacture a series range of cutting tools for machining of Cast iron, Aluminium alloy and Non-Ferros metal, it is widely used in all major sectors like Automobiles, Engineering, Aerospace, Aviation and 3C industry. Premium quality of raw material is used in the production and strict examination during processing with advanced equipment, so our client are satisfied with our reliable quality and on-time delivery.
Our best selling of cutting tools include PCD Inserts, PCD End Mill, PCD Ball Nose Mill, PCD Reamer, Carbide Taps , Carbide End Mill, Special Form Cutter and many more. For these years we have been made a large forward in the technologies of manufacturing cutting tools. With high quality on performance and price, our product sells well both on domestic and overseas market. And we will always focus on the quality and best service, to make long business relationship.
quanlity control:
We have dedicated team of quality control and precise equipment to keep good and stable performance for our products and processing services.
PCD Drill Bit ,PCD Drills,Carbide Drill Bit ,End Mill Bit
OPT Cutting Tools Co., Ltd. , https://www.optdiamondtoolss.com