Microphone Patterns and Stereo Recording - Solid-state Devices and Analog Circuits - Day 11, Part 2

[@Tims_Projects]

Just found your channel, great stuff, thank you.

[@OreilleGauche]

Sooooo great video! Thanks you so much! I've learned lots of things from this video and your chanel in general!

[@matambale]

Bob Carver (formerly of Phase Linear) invented that stereo expansion technology - "Sonic Holography". Very clever. The effect can be quite remarkable.

[@MrJvlake]

I find your content highly accessible, something about the way you explain things just sticks! Have you done any videos on basic FM transmission and reception from first principals?

[@Handverker]

thank you all your video I watched I learnt

[@InsideOfMyOwnMind]

Ah, the CD4 Quadradisc. I still have a few.

[@Vocademy-Electronics-Tech]

I still have one, the one pictured on Wikipedia. I had a CD-4 receiver/amplifier, but at the time, proper cartridges and needles were only available used or new, old stock on eBay at exorbitant prices. The amplifier eventually failed (probably just bad capacitors. If I still had it, I would try to fix it). I tried using a regular Audio Technica cartridge with an elliptical needle, but the quad sound cut in and out. In stereo, it sounds horrible with all the ambient sound mixed into the front channels. Sounds like a concert in a tunnel.

[@InsideOfMyOwnMind]

@@Vocademy-Electronics-Tech I believe they used a hyper elliptical stylus often referred to as a Shibata stylus. Yes they were/are super pricey.

[@turbulent-582]

I have been in electronics since 1969, and all this time, I never understood nor see the usefulness of dB, no matter how many times it was explained, subconsciously I refused to understand it, and it never made any sense to me... Boolean algebra made more sense lol.

[@mikesradiorepair]

Deal with RF communications for a while, dB is priceless. I could be dealing with a 10kW transmitter and a receiver that has a sensitivity of .05 femtowatts. Dealing with well over a dozen decimal places is a pain. So much easier to deal with power in orders of magnitude.

[@Vocademy-Electronics-Tech]

Watch my video, 'A Quick Look at Decibels,' linked in the description. Decibels are very useful for compressing wide ranges into manageable numbers. The best example is the dynamic range of human hearing. Would you rather say 10,000,000,000,000 to 1 or 130 dB?