Trying to make a Long Wave radio converter part 3: mixer and VFO/Local oscillator realized

Please read the textbox first. Trying to make a radio converter to receive radio stations in the Low Frequency radio band, going from 150 KC up to 280 or 300 KC. Kind of project.


This is video 3.


Video 1 about this project is here https://youtu.be/gW8hZBa4sbo
Video 2 about this project is here https://youtu.be/flH--5q7zbw



Much more information about the approach that I use to make this Long Wave radio converter is in the textboxes of video 1 and 2. So I don’t repeat it here.


Radio converter principles are (also) here https://youtu.be/Zrfmoo29pxk


Circuit of the VFO/local oscillator (953KC-1.3MC) that I used in this Long Wave radio converter is here https://youtu.be/Ng49kGF3n8o


About the so called “mixer circuit” here are (too many….sorry for that) video’s: Perhaps I repeat myself too much, anyway….


First video SW Radio Mixer https://youtu.be/pfpvPXXTaG0
Second video SW Radio Mixer https://youtu.be/cMzby37OOHc
Third video SW Radio Mixer https://youtu.be/FijRbGpwcbs
Fourth video SW Radio mixer https://youtu.be/TiOVbwkp9-o
5th video SW Radio mixer https://youtu.be/Mm7CxIC-MwY



Principle of an active antenna that I am going to use is here: https://youtu.be/lWGIsmFWS7U


Please note: I show in that video a “not-tuned” (=a- periodical) antenna amplifier, but I will use the FET BF 256 A in this Long Wave radio converter (of course) with a tuned circuit/tuned antenna coil in the 150 KC-300 KC radio band.


Another well working circuit for an antenna coil is here:

https://youtu.be/i8uAbKUV6Tc


Capacitor tester (non polar types) is here: https://youtu.be/etEfoHZAmww



There are more than 1200 Video’s on my YT channel. I only do analog electronics: audio amplifiers, analog measuring devices, radio circuits, many Shortwave radios, many oscillators HF and audio, other audio & shortwave circuits. Also many (test) generators for all kinds of waveforms, both in the audio range and HF. Also simple “switch” circuits like the Schmitt triggers acting on different input voltages, 555 circuits and circuits of basic electronics issues like “Ohms law”, resistance properties, capacitance properties, the capacitors testing process, electronic “matching” in audio circuits and audio amplifiers, audio pre amplifiers, microphone amplifiers, etc. In all cases you find the schematic inserted in the video.


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Upload 21 October 2021.