FAL stereo audio mixer channel strip circuit
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- Опубліковано 11 жов 2024
- I reverse engineered the circuit diagram (schematic) for the channel strips in the 1977 FAL 12 channel stereo audio mixer seen in this video:
• Exploring a 1970s FAL ...
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This is great for students to see how real circuit are put together. From a time when you can understand schematics.
I didn't realise that the 741 was that old. Recently I got some out from my old stocks (c1987/1988) and they worked as a 741 should do.
The 741 is a great and cheap experimenter option!
I was not saying the 741 is bad, but by now there are many better options readily available, that are pin compatible with the 741.
You put a lot of work into drawing out the circuit.
Interesting, a Big Clive style video but it's about audio equipment!
I like it 😊...
Great job on the reverse engineering.
Thank you :)
Great job. Thanks for the effort.
I love electronics, I loved your video explaining the circuit
Thank you :)
Impressive job, thanks for this!
You are welcome :)
This is awesome. I am currently making a passive mixer for a little portable synth setup (3 synths, drum, bass and keyboard). I am horrified by the pan setup D: but when you explain it it makes perfect sense :D What would such a pot be called if I tried to source one? Cheers, and I subbed immediately, I am looking forward to going through the rest of your vids.
Oh my goodness, you are the real deal
Hi Dr Cassette love the information on the Fal Channel Strip. I'm trying to Buid / Design a home Made Mixer, and I'm very new to Electonics. Is there any Possibility of a Copy of the Schiematic that you Reverse Engineered of this Channel Strip as I would like to Study it in Detail ? Kind Regards Andy
There they are, take screenshots..
Interesting circuit DC.
To the left of "500Hz" is an OP Amp where the V+ terminal is immediately grounded - no problem. However, what caught my eye is there may be some unintentional dc offset voltage (at the input) due to native OP Amp biasing currents? It is often a good idea to ground the V+ terminal via a calculated resistance to negate unwanted offset. This offset will amplified by the OP Amp and may be amplified (again later) right through the next cascaded set of OP Amps? Depending on the polarity, the offset voltage may tend to switch-in the 'peak LED' too early?
If these are all transistor based OP Amps, then the dc offset might become quite a problem?, less so with FET types.
Just me thinking out a loud. ;o)
Thanks for the upload! :o)
[Edited a few times]
Thank you 👏🏼👏🏼👏🏼
Nice amplifies eqlazar carcut
The mystery of the BUS voltage, of peak LEDs is that the noise of the transistor switch that turns on and off should not be mixed since there can be 32 Peak LEDs on / off all time, and this would cause noise in the audio signal lines They are sensitive to voltage changes, for this reason it has an independent voltage source.
sir please give pcb
This schematic diagram dive me help you