Johnson's Techworld

This is the side of the Raduino board facing backwards while mounted vertically, which I had posted in my previous video showing regulator IC 7805, 25 MHz crystal,

I am checking the function of audio amplifier of Easy BITX in the method suggested by VU2TDD. After connecting the 12V power supply and keeping the enclosure open,

As the soldering work of the Easy BITX board was completed, I was quite eager to test a power on to see what will happen. Fortunately, no ‘holy

After fixing the trifilar transformers yesterday, started off with the bifilar transformers. Moved on to the antenna cable, wiring loudspeaker, power supply lines and volume control lines. Inserted

I had thought that identifying the three leads and fixing as per the circuit on the Easy BITX PCB will be rather tough as I am using same

These days it is a tough job hunting for resistors in local shops. When we go there and wait for our turn, finally one or two of the

“Difficult Part of Easy BITX”: Trifilar and Bifilar Transformers, was easy after seeing a video by VU2TDD! Winding instructions from the Easy BITX manual were followed, for winding

Now the TOKO coils for 40m and 20m have been fixed. Next step is winding the toroidal transformers. Both trifilar and bifilar windings are needed for these. Few

In amateur radio, Intermodulation Distortion (IMD) is a form of signal interference that occurs when two or more signals interact within a non-linear device—such as an overdriven power

TOKO Band Pass Filter Coils seemed a bit tough as I am beginning the hand winding of the coils in Easy BITX after completing the assembly of other