LB7UG suggested adding two LEDs antiparallel with (in opposite directions) and a 4.7 K resistor in series to my QRP dummy load to get a visual indication of
Set out to check the voltages at IRF510. These were the voltages which I got: Gate 1.78 V (after turning the 10K multi-turn preset about 8 turns clockwise
My homebrew N5ESE Classic RF probe had shown very low voltages when I measured 5W output from my FT-710 radio to a homebrew 5W dummy load. Possible reason
The ATU-100 EXT is the popular “Extended” version of David Fainitski’s (N7DDC) open-source automatic antenna tuner. It is widely used by homebrewers because it’s affordable, effective, and handles
Quickly homebrewed a 5W fifty ohm dummy load using twenty 1K resistors, each of 0.25W, in parallel. The combination was soldered on to a PL259 connector attached to
I was wondering which steady signal to use of tuning TOKO bandpass filters in Easy BITX. In my earlier stint on homebrewing about 4 decades back, I used
Initially when I assembled Easy BITX there was no audio at all. After fixing four 1N4148 diodes in the collector supply line of four RX transistors, it started
One of my viewers suggested homebrewing N5ESE’s Classic RF Probe. Though I could not source all the components exactly, I am going to try. The resistor mentioned in
Easy BITX PCB is densely populated and dual sided. So I found it difficult to identify the component connections on the reverse side where only a few SMD
