Johnson's Techworld

Here is a head to head comparison of half wave dipole antenna and full wave loop antenna, both working on third harmonic, the odd harmonic principle, on 15m.

BITX means bidirectional transceiver with classic bidirectional topology developed by VU2ESE, where most circuit blocks are used for both transmitting and receiving by simply reversing the signal flow.

Read online that CLK1 of Si5351 in the Raduino board of Easy BITX generates the BFO signal and CLK0 the VFO signal. VU3EBS had already mentioned that the

Today morning when I checked my newly assembled Easy BITX once again, I could not find the local AM station breakthrough. Then I thought of checking the VFO

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