Please read the description/textbox first. A retro video of a SW radio that I made 2 years ago (Oct. 2020), going from 6-12 MC. There are many public broadcast stations there, in that frequency band, especially in Europe. E.g. stations of France and especially many eastern Europe radio stations are still there, say radio Roemenia and many more. Always: Radio China, its an extreme fierce SW radio signal.

They pop up (can be received properly) especially during the late evening and during the night, in Europe (that has to be said).

That has everything to do with the radio propagation in this frequency band (6-12 MC) and the location where you live on earth. Study radio amateur (or via professional radio stations) to learn about the propagation expectations, during the day/night/time (weeks or a month), they publish (sometimes) tables on which frequency/hour/time/times you can expect good radio reception on frequency “X” on Shortwave (on the place where you live on earth...). With this radio: only in the 6-12 MC Radio band.

Schematic is classic and quite simple, say the Allamerican5 of the very past: a HF stage (front end) with a FET, a Local Oscillator, an IF stage with ceramic filters on 455 KC, an AM detector made with a germanium diode (forward biased, watch schematic) and then a pre-amp and an audio end-amp for (say) 2 Watt.

This radio circuit has no AVR (automatic volume or frequency control), so suffers from the “classical” Shortwave fading. The IF bandwidth can be set to "broad" (say 10 KC) and wide (say 6 KC), via a simple adaptation (schematic, via a relay circuit).

Noise control is there (say simply via a 50N or 100 N = 0.1 uF capacitor to ground) in the audio lead, thus no high tech.

IMPORTANT: I am still shadow banned and censored by You Tube because of my critical comments regarding the mRNA (so called) “vaccins”. Saw it again today, 15 dec. 2022, when I posted a comment on a Dutch YT Channel.

It regarded my mail of 15 dec 2022 to the Dutch “Sanquin” Organisation (read: the Dutch blood bank). On their website they stated that the spikes of the Covid mRNA injection "stayed at the arm muscle and did not go into the blood stream", or that effect (in the blood stream) was extremely unlikely.

Link is here [ Ссылка ]

I mailed Sanquin about that statement on their website.

Link with my (Dutch) comment on the Wybren van Haga YT Channel (he is a Dutch politician) is here: [ Ссылка ]

There was (!) showed my question to Sanquin, my e-mail from today, 15 dec. 2022.
NB: my comment is DELETED by Google/You Tube/made not visible for the public on 15 dec 2022.

I got a mail confirmation from Sanquin that they will answer me within a Month. I will keep you informed and about the reaction of this Dutch bloodbank/Sanquin about this issue.

Anyway:

Important: VFO/Local oscillator tuning (6-12 MC) is NOT done with a capacitor, but only by varying the voltage to a FET (Field effect transistor) in the Local oscillator. Via a fine tune and coarse tune potentiometer.

A) The absolute demo + all the schematics of this SW radio is/are here [ Ссылка ] The peculiar way of making the VFO is on 11.06 etc. in this video.

B) Mixer + IF Amplifier with the showed ceramic pale yellow 455 KC filters + the AM detector with the Germanium diode is also here [ Ссылка ]

C) This SW radio with links to how I made it (10 October 2020) is here
[ Ссылка ]

D) VFO Setup (made with potentiometers and Si diodes, so no clasic air tuning capacitors ) is here:
[ Ссылка ]

E) Perhaps this: A basic & elementary SW radio circuit is here [ Ссылка ]

My You Tube channel trailer is here: [ Ссылка ] When you search, search always “NEWEST FIRST” to get the right overview. You can also search via the “looking glass” on my Channel trailer via keywords like ”audio”, “radio”, “amplifier”, “filter”, “Shortwave”, “transistor”, “FET”, “oscillator”, “generator”, “switch”, “schmitt trigger” etc; so the electronic subject you are interested in.

My books about electronics & analog radio technology are available via the website of "LULU”, search for author “Ko Tilman” there.
[ Ссылка ]

I keep all my YT videos constant actual, so the original video’s with the most recent information are always on YouTube. Search there, and avoid my circuits that are republished, re-arranged, re-edited on other websites. Upload 15 december 2022. Update 16 March 2024.

The BF 245 FET is obsolete. The BF 256 B FET (same pin connections) also works here. 16-3-2024

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