Checking Transmitter Signal Power Without Powering Up

[mikekyrou]

Hi,
How to check my transmitter signal power? I have found my transmitter in my friend shed and needs some new output transistors. But i don't know what is the power of my transmitter and if it worth to repair it. There is the RF board and also a encoder. There is also an amp so i don't know how to check its power. At the moment i can't power it up as i am building the antenna (harmful to switched it on without antenna). Is there any other way to check its power?
Thank you

 

[mp3car]

I assume this is some kind of home brew/DIY unit? Because if it's a commercial unit, just google the make/model of the unit...

 

[mikekyrou]

yes it is a diy home made unit.

 

[eduedulobo]

I am sorry but if its a DIY unit what is wrong with transmitting and simultaneously trying to go out of range with a hand radio.

 

[alphy]

for your question. I would suggest using a power meter to measure the output power of your transmitter. Power meters are commonly used in the field of electronics to measure the power output of various devices, including transmitters. They typically consist of a sensor that measures the power and a display unit that shows the measurement. Power meters can measure both DC and AC power, making them suitable for measuring the power output of your transmitter.

To use a power meter, you will need to connect it to the output of your transmitter. This can be done by connecting the sensor to the antenna output or by using a coaxial cable to connect the sensor directly to the RF board. Once the power meter is connected, you can power up your transmitter and measure the output power.

If you do not have access to a power meter, there are other methods you can use to estimate the power output of your transmitter. One method is to use a dummy load, which is a device that simulates an antenna and absorbs the power output of your transmitter. By measuring the voltage across the dummy load, you can calculate the power output of your transmitter using the formula P=V^2/R, where P is power, V is voltage, and R is the resistance of the dummy load.

Another method is to use a spectrum analyzer, which can analyze the frequency spectrum of your transmitter's output. By looking at the amplitude of the signal on the analyzer, you can estimate the power output of your transmitter.

However, please keep in mind that these methods are not as accurate as using a power meter and may only provide an estimate of the power output. It is always best to use a power meter for a more precise measurement.

In conclusion, as you are unable to power up your transmitter at the moment, using a power meter or other methods to estimate the power output will help you determine if it is worth repairing. I hope this helps and good luck with your antenna building.