Firstly I soldered the low frequency oscillator (Tr3, TR4, TR5) and the surrounding devices. The scale is also not very important.Īfter the finishing of the PCB I started the soldering. Because the circuit does not contain any chips the image can be mirrored or can be printed without mirroring. I took the circuit without changes from the site linked before.įor the PCB I used the toner transfer method and the picture attached here.
#SIGNAL GENERATOR HOW TO#
I will show step by step instruction how to reproduce the design with minimum efforts and errors rate. I will not go deep inside the circuit explanation - you can visit the links above and read all you need there.
I repeated mainly the first design adding additional digital frequency counter instead the not very precisely radial scale analog calibration. The credits for this design go to their authors. As a basis I have chose an existing RF signal generator published here. Instead to base the architecture on the modern DDS chip, I decided to use the analog approach. I decided to create an RF signal generator working as fully functional stand alone device. This makes it inconvenient to work with it outside the house. It requires additionally power supply module and two signal generators - for the RF carrier frequency and for the modulating signal. It works fine in some cases, but it has the disadvantage to be not able to work as standalone device.
Some time ago I have designed an AM modulator, which could be used for such purposes. If it can modulate the frequency amplitude or frequency makes it non replaceable tool for RF design works. Very useful feature of the RF Signal generator is its modulation capability. It is used to tune a resonant circuits and adjust the gain of different RF stages. The RF signal generator is a must to have tool when playing with radio receivers.
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