Transmitter PCB

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What Are Transmitter PCB Materials?

Transmitter PCB includes of significant materials. In General, FR-4 materials are used here.In addition, PTFE with glass-fortifhed hydrocarbons is the core material of this boards.

These PCB materials offer super impedance control and dielectric strength. You could find some basic components in this PCB assembly. Like as power supply, modulator (AM and FM), oscillator, antenna,amplifer and so on.

Transmitter PCB Materials

What Are The Benefts Of A VHF 1 Transmitter PCB?

Very high frequency (VHF) transmitter PCB offers the following remarkable advantages.

1.VHF data transfer is less vulnerable to noise. So you could use it in long-distance information transfer.
2.It increase the longevity of the battery used in signal transfer.
3.The wavelength of the VHF semaphore is more highercompared to UHF (Ultra High frequency). This is because to the oppsite relationship between frequency and wavelength.

What is The FM Transmitter PCB?

FM understanding like a frequency modulation. FM transmitter PCB is a low-power circuit boards that changes the frequency of the signal wave to transmitting data. This is worthwhile in noise decrease and developing the quality of signal diffuse.

FM transmitter PCB is the most of effective portion of high-frequency communication apparatus. It enables the apparatus to transmit the signal frequency which is got by the FM signal receiver to make amplifncation.

FM Transmitter PCB

Your Best Transmitter PCB Partner

Transmitter PCB

Venture is your one-stop manufacturer of electronic products in China. We offer electronic solutions and services for our customers. To maintain our network in the electronics industry and commercial markets. Venture introduces designs, operations, and sales for our transmitter PCB supplies.  Our transmitter PCB services includes:

  • Infinite operation time
  • External antenna
  • Highly sensitive electret microphones
  • Easy to hide within existing objects like radios, power distribution, sockets, etc.
  • Low-Cost Vibration Transmitter  PCB
  • Dimensions 28x28x6 mm

Your Leading Supplier Transmitter PCB in China

Venture manufactured transmitter PCB ideal for handling damage that may occur on the PCB. We are able to make transmitter PCB products at a low cost but high specifications to bear on your PCB.

Venture transmitter PCB has been tested and type-approved for integrators and developers.

Transmitter PCB

Venture designed transmitter PCB that can operate for more than 1000 transmissions without static discharge. It made our transmitter PCB suitable for developers wanting to develop their own low-cost power solutions.

Venture transmitter PCBs with long transmissions are trusted in good condition before needing to be replaced.

Venture featured transmitter PCB that can be used for turning on lights, switching machinery, and any general remote control applications. Due to the very small size, our transmitter PCB very easily can be concealed in sockets, junction-boxes and does not need much space.

Transmitter PCB

Venture transmitter PCBs are proven effective between floors and across buildings, even transmission range within buildings is reduced. These will help you to improve your projects and designs.

Venture prioritize our customer’s needs. To ensure the quality of our product, Venture offers proper product testing while introducing it to you.

Our staffs are respectively and always willing to help and guide you to find your needs. Venture transmitter PCB comes out with a very simple installation.

Transmitter PCB

Venture makes sure all transmitter PCBs are useful for connecting and another purpose. Venture transmitter PCB is useful in convenient disconnection.

Venture manufacture transmitter PCB to avoid static discharge and to manage sensitive electret devices in a secure manner. In short, Venture always makes sure about safety.

If you want more information about Venture, you can Email us!

Transmitter PCB: The Ultimate FAQ Guide


In today’s guide, I will answer all questions you have been asking about transmitter PCB.

So, if you want to be an expert in transmitter PCB, this is the right guide for you.

Keep reading.

What Is Transmitter PCB?

Transmitter PCB is a type of printed circuit board that forms an important part of any electronic device used in communication.

Basically, a transmitter PCB helps in transmission of signals containing some kind of information.

FM Transmitter PCB

FM Transmitter PCB

Is There Difference Between Transmitter PCB And Transmitter Module?

No, there is no difference between the two terms.

A transmitter module is defined as a small PCB assembly able to transmit and modulate radio wave to convey data.

Therefore, you can us the two terms interchangeably to mean the same product.

Which Are The Different Types Of Transmitter PCB?

A transmitter is no doubt an important part of any communication system. There are different types of transmitter PCB as explained below:

AM Transmitter PCB

AM transmitter PCB is mostly used in voice communication and broadcast devices. Applications of the AM transmitter PCB goes way beyond radio-broadcasting as aircraft communication also uses them.

AM transmitter uses carrier frequencies ranging from 540 to1700kHz at 10-kHz intervals.

With AM modulation the modulating signals varies the immediate amplitude of the carrier signal.

There exist 2 types of AM transmitter PCB that are applied depending on their transmitting power. They include high level AM transmitter and low-level AM transmitter.

High-level transmitter PCBs basically employ high level modulation whereas low level transmitter PCBs employ low level modulation.

One disadvantage of AM PCB assembly is the fact that the receiver component amplifies and senses noise in similar percentage as the signal. This leads to raising received signal to noise ratio, which would need you increase the power of transmitter by a factor of 10.

FM Transmitter PCB

This refers to a low power transmitter circuit board that applies FM waves for transferring sound.

It conveys audio signals via carrier waves through frequency difference.

Normally, FM transmitter PCB use VHF frequencies in the 88 –108MHz range.

For FM transmitter PCB devices, the maximum frequency deviation is positive or negative 75kHz.

FM transmitter can be applied in various ways like:

  • In correctional facilities to reduce noise in prison common areas and other important places.
  • In fitness centers and cars.
  • Used in home sound systems.

Some advantages of FM transmitter PCB include:

  • The price is low and is easy to use.
  • Prevent noise signal from amplitude alteration.
  • Has large operating range.
  • Has high efficiency in transmitting signal.

Some disadvantages of FM transmitter PCB are:

  • Require wider channel.
  • Received signals gets poor quality when there is some interference.
  • The circuit board tends to be more complex.

Single-Sideband (SSB) Transmitter PCB

SSB transmitter PCB refers to an AM scheme where only one sideband is transferred via radio waves.

These SSB only have one layer of the base substrate and one single conducting layer.

Single-sideband transmitter PCB has several benefits which include:

  • Ideal for simple designs.
  • They have low manufacturing and production cost.
  • Single-sideband transmitter PCB are easy to understand.
  • Has low defect probability.

SSB PCBs are perfect choice for beginners and are mostly used in simple electronics like cameras, calculators, radios and power supplies.

Although they are easy to produce and relatively cheap, there are restrictions to what it can do.

Modern Wireless Transmitter PCB

Modern wireless transmitter PCB utilize digital technology, since in FM and AM transmitter PCB is completely analog.

Current transmitter PCB frequently make use of digital-signal-processing (DSP) technology for processing information transferred.

Direct-Conversion Transmitter PCB

Direct-Conversion transmitter circuit board is one of the commonly used transmitter PCBs as it is simple and cost-effective.

The diagram below explains how digital data is transmitted.

How Direct-Conversion Transmitter PCB work

How Direct-Conversion Transmitter PCB work

First, the digital data containing information to be conveyed is processed into the Q and I signal.

The Q and I signals are subsequently passed through the DACs (digital-to-analog converters).

Next, DAC output signals are subsequently fed to the LPF (low pass filtering) respectively. After passing through the low pass filtering, signals enter the corresponding mixers.

The architecture uses local oscillator (LO) which is provided 90° phase shift to one of the mixers before the mixing process.

At this point, the Q and I signals from the two mixers have integrated.

Power amplifier helps in amplifying the emerging modulated signal then feeds it to an antenna where the signal is launched.

The transmitted signal eventually reaches the receiver where it is demodulated to regain the Q and I signal.

Superheterodyne Transmitter PCB

superheterodyne transmitter PCB features greater complexity in comparison to direct-conversion transmitter PCB.

Its working principle is the same as that of direct-conversion transmitter PCB till the initial bandpass filter 1.

Superheterodyne Transmitter PCB Schematic

Superheterodyne Transmitter PCB Schematic

Intermediate Frequency (IF) is the signal that arrives at the band filter 1.

After amplification, a mixer upconverts the IF signal to the ultimate output frequency.

The primary disadvantage of Superheterodyne transmitter PCB is the production of unwanted signals at mixer 3 output.

What Is The Difference Between Transmitter PCB And Receiver PCB?

Transmitter PCB comprise of several components that function together to produce and decode radio signals, which consist of important information like audio.

On the other hand, Receiver PCB captures the radio waves using an antenna.

It then processes and draws out only those radio signals vibrating at preferred frequency, when are then displayed in an audible form.

What Are The Main Components Of Transmitter PCB Assembly?

The primary components of transmitter PCB assembly comprise of:

Power Supply

Supplies the electrical power required to enable the transmitter PCB to function.


Generates AC at the frequency under which signals will be transmitted. It usually produces a sine wave that is known as carrier wave.


The role of the modulator is to add meaningful information to carrier wave, and it does this in two ways:

Amplitude Modulation (AM)

Here, the modulator performs small increase and decrease to the carrier wave intensity.

Frequency Modulation (FM)

In this case, the modulator performs slight increase and decrease to the carrier wave frequency.


It increases the power of the modulated carrier wave by amplifying it. Therefore, a more powerful amplifier leads to a more powerful broadcast.


The antenna converts the amplified signal into radio signals.

Do You Require MOSFET During Assembly Of Transmitter PCB Components?

Yes, you will require Metal Oxide Semiconductor Field Effect Transistor in a transmitter PCB assembly.

MOSFET refers to a semiconductor element that is popularly utilized for switching functions and for electronic signals amplification.

It is either an integrated or core circuitry where it is engineered and constructed in one chip. This is due to the fact that MOSFET comes in very tiny sizes.

They resemble switches that turn on and off depending on a pulse from an IC referred to as PWM controller.

MOSFETs turn on and off very fast, enabling high current to pass across in short bursts.

This regulates the voltage transferred to other components on the transmitter PCB. Generally, MOSFET is assumed to be a transistor and is applied in both digital and analog circuits.

How Does A Transmitter PCB Assembly Operate?

The popular BC109 emitter first amplifies the audio signal from microphone or any other gadget.

The amplified signal then gets specified to oscillator circuit via the coupling capacitor.

Subsequently, the oscillator circuit produces a signal having a frequency established by the variable capacitor value.

The coupling capacitor helps in coupling the emitter output signal to the input of power amplifier transistor.

During signal amplification, the variable capacitor within the power amplifier incline to extend output harmonization to that of oscillator.

An antenna then transmits the amplified radio signal.

What Is The Frequency Range Of Transmitter PCB?

Most transmitter PCB devices have a frequency range of 88 to 108MHz.

Which Are The Types Of Digital Modulation Applied In Transmitter PCB?

The digital modulation types employed in transmitter PCB include:

Amplitude-Shift-Keying (ASK)

Here, the signal amplitude is diverged as the function being conveyed and all other aspects of the signal stay constant.

The resultant output amplitude relies on the input data.

The carrier frequency determines whether the resultant output needs to be a variation of negative and positive or zero. A system’s nonlinearities such as nonlinear amplification can influence ASK.

Therefore, it is essential to use components having extremely linear performance.

This helps in preserving the amplitude features of transmitted and received signals.

Some of the applications of ASK modulation consist of fiber optic transmitter and receiver and IR remote control.


In FSK, you transmit the information when you change the carrier signal frequency.

The signal features two pre-defined frequencies applied to denote the 0 and 1 digital values.

There are two different ways of applying frequencies shift including coherent and non-coherent format.

In coherent FSK, there is immediate alteration in bit-representing frequencies in the absence of phase discontinuation between the frequencies.

However, there is discontinuations between frequencies denoting the digital signals in non-coherent FSK.

Frequency-Shift-Keying digital modulation need high frequency stability in the signal source of a system.

Some of the applications of FSK primarily consist of modems in phase shift keying and telemetry systems.

Phase-Shift-Keying Modulation

PSK refers to modulation method where the carrier signal phase is altered by varying the cosine and sine inputs.

Here, you discretely change the stage of carrier to represent the various digital bits.

Phase-Shift-Keying digital modulation relies on tight phase tolerance within a system.

M-Ary Digital Modulation

In this type of digital modulation, there is creation of 2 or more bits.

These created bits help in transmission at once on a sole signal, which aids in minimizing the bandwidth.

There exist three main types of this digital modulation techniques including M-Ary PSK, M-Ary FSK, and M-Ary ASK.

What Are The Disadvantages Of FM Transmitter PCB?

There are several disadvantages that affect FM transmitter, they include:

  • There is poor quality in the signals received due to some interference.
  • Requires huge wider channels.
  • The PCB is mostly for educational applications and may need more practical approach.
  • The FM transmitter circuit board incline to be more sophisticated.

What Factors Affect The Performance Of Transmitter PCB?

The performance of any radio frequency device depends on various factors.

For instance, raising the power of transmitter PCB leads to gathering of large communication distance.

Nevertheless, this will cause high electrical power drain within the transmitter PCB device.

As a result, the high-power drain will lead to reduced service life for battery-powered transmitter printed circuit board gadgets.

Moreover, employing RF gadgets at greater transmitted power will produce signal interference with surrounding RF devices.

However, you can improve the RF performance by applying matched antennas at every edge of the communication link.

Is Impedance Matching Necessary In Transmitter PCB?

Yes, Impedance Matching helps in preventing signal reflection. When a travelling signal wave encounters an impedance matching there will be signal reflection back to the source.

Impedance Matching helps to make the driver or receiver impedance resistive. If the receiver has capacitive or inductive impedance it will show its own fleeting response.

Impedance Matching also aids in maximum power transfer. Maximum power can be transferred between two circuit elements when their impedance is matched.

What Is The Working Temperature And Transmitting Rate Of Transmitter PCB?

In transmitter PCB, the working temperature ranges from 10°C to +55°C. Whereas the transmitting rate of transmitter PCB is 512.

Transmitter PCB Assembly

Transmitter PCB Assembly

Which Are The Communication Protocols Applied In RF Transmitter PCB Assembly?

The common communication protocols employed in RF transmitter PCB include:


UART (Universal Asynchronous Receiver/Transmitter) is a lower-voltage microcontroller friendly that dates back to 1960s.

The design of this communication protocol was to enable it communicate between data communication equipment (DCE) and data terminal equipment (DTE).

There exist 2 types of UART including receiving UART and transmitting UART. Communication between the two UART types can be completed by each other directly.

You simply need 2 cables to convey information between the 2 UART. This communication protocol is universal by the fact that you can shape timing, voltage, flow control and error checking.

Serial Peripheral Interface Bus

The SPI refers to synchronous serial communication interface specification employed in short distance communication. It is equally used to remit data between microcontrollers and other peripherals like sensors, SD cards, LCDs and many more.

SPI uses seperate data lines and a clock that keeps both devices connected in perfect synchronicity. It’s also called a four-wire serial bus.

Universal Serial Bus

USB is the commonly applied communication protocol having different varieties and speeds. It serves as a plug and play interface that guarantees standard, inexpensive connection for peripheral gadgets like scanners and keyboards.

You can connect up to 127 peripherals to one USB controller. All USB apply differential signaling to minimize interference and permit high-speed transmission across an extended distance.

How Does VHF And UHF Transmitter PCB Compare?

UHF (Ultra High Frequency) uses higher frequencies than VHF (Very High Frequency). However, it means that the UHF has a shorter battery life.

VHF transmission occupy the frequency band (30-225MHz) while UHF occupies band (226MHz-3gHz). Channels of UHF have a higher bandwidth than VHF, hence carries more information.

UHF waves are more affected by attenuation as compared to VHF hence the VHF waves can travel longer distance than UHF.

Antennas of the UHF are smaller than VHF as their wavelength is smaller than VHF.

What Is I/Q Signals In Transmitter PCB?

I/Q signals denotes the application of 2 sinusoids that feature 90 degrees relative phase shift and similar frequencies.

The in-phase (I) signal denotes the reference signal whereas Q (quadrature) signal moves 90 degrees of I signal.

You can perform phase, frequency and amplitude modulation by adding amplitude-modulated I/Q signals. Combining I and Q signals forms a crucial step with respect to sophisticated modulation.

Can You Change Any Of The Configurations After Fabrication Of Transmitter PCB?

Unfortunately, No. The settings cannot be changed by the user.

Although we are capable to adjust some of the parameters during manufacturing to meet a particular project need.

Which Are The Essential Transmitter PCB Certifications?

Product compliance based on an integrated compliant RF module is a common misunderstanding.

Transmitter PCB complaint to the necessary requirements of the country’s regulation rarely ever covers the final product.

When integrating a compliant RF module, it doesn’t mean that full compliance testing is required.

RF Transmitter PCB module is essential in today’s consumer product but also only a part of the final product.

At the end it is the final product that needs to agree with the regulations. Aspects as safety, radiated susceptibility, health can’t be covered on a modular level.

However, some of the important safety and quality certifications for RF transmitter PCBs include:

  • FCC
  • ICES
  • CE
  • RoHS

Why Is RF Shielding Important In Transmitter PCB?

An electronic device that transfers or receives sensitive radio frequency signals might require crucial RF shielding.

This helps to ensure the signal content stay isolated from undesired noise coupling within the surrounding.

In most instances, this implies that metals can encircle an antenna or radio cabling.

However, shielding may as well imply maintain appropriate grounding paths close to the RF signals.

Grounding is an essential factor for signals coming from and to antennas coupled with any RF processing circuit.

Without cautious attention to transmitter PCB layout, there can be disturbance on the ground plane.

Applying buried traces inside the transmitter PCB may be a secondary technique of refraining undesired signals from escaping into or from the device.

EMI Shielding in Transmitter PCB

EMI Shielding in Transmitter PCB

Which Are Some Of The EMI Filtering And Shielding Methods For Transmitter PCB Assembly?

Board And Component Shielding

Majority of EMI shields feature a metallic package that circle part or the entire transmitter PCB.

Although the distinct techniques differ dependent on source of EMI, the main objective is to prevent the EMI from penetrating the PCB circuitry.

For EMI originating from within the system, you can use component shields to encapsulate a particular component that causes electromagnetic interference.

The shield links to ground, decreases size of antenna loop and absorbs EMI.

Faraday Cage refers to a thick protective encasing engineered to obstruct RF waves. It is typically constructed using conductive foam or metal.

Low-Pass Filtering

At times transmitter PCB can incorporate low pass filters that are instrumental in eliminating high frequency noise out of components.

The filters contain the noise out of these PCB parts, thus enabling the signal to progress on the return route without interference.

Cable Shielding

Greatest amount of EMI issues comes from cables that carry digital and analog currents.

They develop problems by causing parasitic inductance and capacitance, which is a specific problem with high frequency signals.

How Does Electromagnetic Interference (EMI) Coupling Occur In Transmitter PCB?

Primarily there are four ways in which EMI Coupling occurs namely:

Conductive EMI

This type of EMI coupling method consists of unwanted energy flow using conductors.

One of the significant and frequent routes for the flow of conduction current is supply cable.

Proper designing of an equipment and follow up of a good installation is the best way to prevent occurrence of Conductive EMI.

Radiative EMI

Radiative EMI occurs when unwanted signals is transferred from source component to victim component by propagating through free space.

Victim system can be seriously affected if it’s forced to accept this radiative signal.

Inductive EMI

Interference from the source can couple through inductive EMI to a ground plane or shared control lines.

Capacitive EMI

Capacitive EMI occurs on a supply line that is coupled to ground with bypass capacitors.

Should All Transmitter PCBs Be EMC Compliant?

Yes. Electromagnetic compatibility (EMC) helps in minimizing unintentional production, propagation and emission of electromagnetic energy.

The emitted energy may result in unnecessary impacts like physical damage or EMI in devices using transmitter PCB assembly.

What Are The Applications Of Transmitter PCB?

There are various ways in which transmitter PCB can be applied, these are:

  • Remote controls
  • Wireless security systems
  • Industry oriented applications
  • Voice transfer application
  • Car alarm systems
  • Automation systems

How Do You Specify Simple Transmitter PCB?

Here are the important information that you should communicate to your PCB manufacturing during specification of transmitter PCB:

  • Modulation
  • Channel spacing
  • Transmit power
  • Power consumption
  • Battery life
  • Frequency selection
  • Power supply
  • Deviation
  • Frequency range
  • Transmit duty cycle
  • Baud rate
  • Programming cable
  • Message format
  • Configuration application
  • Serial port
  • Discrete inputs
  • RF connector
  • Environmental protection
  • Operating temperature
  • Weight
  • Color
  • Type approvals

What Is The Procedure Of How To Make A Simple FM Transmitter PCB Assembly?

FM transmitter refers to an electronic circuitry helps in the manipulation of carrier signal wave to transfer useful data or information.

Here you will learn how to make simple FM transmitter PCB assembly that functions perfectly.

Designing of FM Transmitter Circuit

The main components that you will require to fabricate a DIY FM transmitter circuit include:

  • Transistors
  • Capacitors and Resistors
  • Inductors
  • Variable capacitor
  • Microphone or any form of audio input
  • Antenna
  • 9v Battery

FM Transmitter Circuit Diagram

FM Transmitter Circuit Diagram

Designing Of Audio Pre-Amplifier

In the FM transmitter circuit design above, audio pre-amplifier features a basic single-stage common emitter amplifier.

Selection Of VCC

In the circuit, NPN Bipolar Junction Transistor is used. BC109 features a voltage of around 40V, thus a smaller Vcc of 9V is used.

Load Resistor, R4

Here, you will determine the load resistor value by determining quiescent collector current. For that matter, the collected voltage needs to be half of the chosen Vcc.

Voltage Divider Resistors (R2 And R3)

You can determine the voltage divider resistors value through calculation of the voltage through all resistors and bias current.

Moreover, the approximate value of the bias current is 10 times the base current.

Emitter Resistor R5

Apply the formula Ve/Le to establish the R5 value. Le denotes the emitter current and is equal to the collector current.

Coupling Capacitor, C1

The role of the capacitor is for modulation of the current flows across the transistor. Therefore, large values designate low frequencies whilst lower values designate higher frequencies (treble).

Microphone Resistor R1

Resistor R1 in the FM transmitter PCB regulates the current amount passing across the microphone.

It ensures that the current stays lower than the maximum of the value the mic can manage.

Bypass Capacitor, C4

For the capacitor C4, an electrolyte capacitor is used. Its purpose is to bypass DC signal.

Designing Of Oscillator Circuit

The components of the tank circuit of the FM transmitter PCB are C6 and L1. The FM transmitter circuit requires oscillation frequency ranging from 88 to 10MHz.

Tank Capacitor, C9

The role of this capacitor is to keep the tank circuitry vibrating.

Bias Resistors R6 And R7

You will base the R6 and R7 values on the value of the bias resistors found in the preamplifier.

Coupling Capacitor, C3

Here, an electrolyte capacitor is used.

Emitter Resistor, R8

The value of the emitter resistor depends on the amplifier circuit calculations.

Designing Of Power Amplifier Circuit

FM transmitter PCBs do not need high power output. Therefore, you can use an A-class power amplifier. In the design, LC tank circuit serves as the output.

Selection Of Antenna

In this FM transmitter circuit, a stick antenna that is a fourth of transmitting wavelength.

Detailed Steps F Making FM Transmitter PCB

Let’s look at the 4 main stages involved in the creation of FM transmitter circuit:

Acquire The Needed Components

Ensure you get all the components needed prior to beginning the development of the FM transmitter circuitry.

Therefore, here are the components of FM transmitter PCB you will require in this project:

  • 2N3904-2 transistors
  • four capacitors: 10pF -1, 40 pF trimmer – 1, 0.1 pF – 2, 4.7 pF – 1,
  • One 0.1uH inductor
  • Five resistors: 100Ω-1, 100k Ω-1, 1M Ω-1, 10k Ω -3, and 1k Ω- 1.
  • An antenna
  • One PCB
  • One 9 Volts battery and clip

Fabricate A PCB

You will need a printed circuit board in order to make the FM transmitter PCB assembly. It is the physical form of your circuit layout.

Fortunately, it is very easy to fabricate PCBs. Thus, you will require a copper clad, one printed glossy paper/permanent marker, small hand drill, ferric chloride powder, and some water.

Here the procedure of making simple PCB:

  • Using a scrubber, eliminate dust from the copper clad.
  • Draw the circuit layout using the permanent marker on the cleaned copper clad. Alternatively, you can as well create the layout by ironing the printed glossy paper on copper clad.
  • Subsequently, add a small amount of ferric chloride to water bowl and blend well using a stick.
  • After mixing thoroughly, submerge the printed circuit board in the solution. This helps in dissolving all undesired copper.
  • Then put the PCB in a different water bowl to eliminate the solution.
  • Use a dry cloth to clean the PCB. After cleaning the permanent marker, you will see the etched layout.
  • Eventually, position the PCB on a support then drill holes into the board.


First, bind the fritzing file of the FM transmitter circuit and the PCB layout. Once the PCB is ready, mount the components is the right circuitry and solder it.

Subsequently, create the inductor using a copper wire of either 18 or 22 gauge.

When you apply copper wire of 18 gauge, form a 4 to 5 turns inductor with quarter inches (oR).

In case of 22 gauge copper wire, form an 8 to 10 inductor with quarter inches. Ensure you solder the inductor to the FM transmitter PCB.

Finally, solder the antenna to the printed circuit board. You can choose a standard antenna or an 8 to 10 cm hook-up wire.

Tuning The Transmitter

The process of FM transmitter tuning is challenging and time consuming. For that matter, you need to be patient and cautious.

It is possible to tune the frequency of transmission by varying the trimmer capacitor.

Therefore, vary the capacity of the trimmer gradually until you listen to some distortions. Afterwards, tune in steadily to the area of distortion till your FM transmitter corresponds to the radio frequency.

You will then listen to a clear radio output. Once you are done with the tuning, you shall have completed the process of fabricating an FM transmitter PCB assembly.

For all your transmitter PCB, you can contact us right now.

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