The easiest way to test an IF can/filter on 455 KHz

A generator between 450 KHz and 480 KHz drives (via a small capacitor from (say) 50-100 pF an IF can on the primary winding from the can (a 455 KHz filter with a 7 Khz wide bandwidth). On the secondary we connect an oscilloscope to see how the filter passes the frequencies between 450 and 460 KHz. We can clearly see the resonance peak on 455 KHz on the scope (maximum energy output). Make the coupling capacitor as small as possible, a loosely coupling from the generator to the IF can gives the best results.

There are approximately 1000 Video’s on my YT channel. I do only 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.


When you have questions about (certain analog) electronic circuits and how to make them: go to my Channel trailer (Radiofun232 on You Tube) and go to the “looking glass”. Type there the keywords that you want/need like: “power supply”, audio amplifier, capacitor tester, oscillator, radio, shortwave, shortwave radio, or any keyword you like to find the essential info & schematics on my YT channel.


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There are (some) links to my video’s on YT available on my Channel Trailer in the “comments” section. In the comments section of my Channel trailer you sometimes find links to other video’s. 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. There are also free downloads and you get the complete view.
You can buy for a small amount 2 documents on the LULU website in which I have “indexed” almost all the links to my video’s & schematics (approx. 900 or more video’s) on You Tube. From these “index documents” you have direct links to all these video’s.
https://www.lulu.com/search?adult_aud...
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The 2 “indexes documents” can also be found via https://www.lulu.com/search?adult_aud...



Some of my books (not all) are available via Barnes and Noble and via Amazon. But all my books (the complete bunch) are/is available on the website of LULU.
Please note: these index documents go to approx. autumn 2020.



Regarding all my video’s: I constantly keep them actual, so the original video’s with the most recent information are always on YouTube. That is the source, and search there. When my videos are reproduced or re-edited on other websites/channels you cannot (!) be sure about the original content (=really working electronics with real properties for a purpose) and important adaptations to the circuits. Be aware of that, I saw on the internet my circuits reproduced in a poor or not proper way. I also found that people probably republish my circuits with phantasy names & phantasy properties, attributing properties to them that they were never made for. Sometimes they want to find gold with them. I take distance from all these fake claims; I cannot help that it happens, sorry. Update 15 feb. 2021.