The information is golden. yum yum. Also, thanks to whomever converted this from VHS... 😶

Surely this video was made in the 90s? lol, great video none the less well explained :)

The first hifi I ever experienced..was a Fisher receiver w/Baxandall tone controls. It was early 70s...heard my first details from an LP (Gerard w/Shure cartridge)... Would own that rig today if I could...

always the sign of a good engineer...slice of toast and a cup of tea...nice one mate lol

Excellent! Thank you.

cool! thanks for that!

Nice explanation.....

True spirit

When you were showing the output on your oscilloscope, your two signals appeared to be out of phase with each other. What would cause that to occur?

@rpsproject5349

3 жыл бұрын

Hi Jedi Minion, as this is a passive filter that is basically hi-pass and low-pass filters in one circuit. Very well designed to work effectively, so the capacitance of such filters will cause a small shift in the phase. That phase shift will change with the frequency and to some extent the cut or boost of the circuit.

WHat will bo good values to use with guitar

@rpsproject5349

3 жыл бұрын

Hi Pedro Jinta, not really sure what values will work well with a guitar as I did not try it with a guitar. I would say try out values that give the mid range of 3KHz to 5KHz frequency as the main part, then cut and boost from that. You will have to experiment with what values work well to get the desired effect.

Totally wrong. 1. The Baxandall tone control is an active filter, not a passive filter as described here. 2. The node labeled 'earth' is the point where NFB is introduced in a real Baxandall tone control, which has no real earth. 3. A passive filter is incapable of boost by definition. 4. The active components are not just there 'to make things nice'. You need a phase reversal via negative NFB to make the Baxandall circuit work. 5. What you have described here is the James passive tone control as still found in guitar amplifiers. It predates the Baxandall by several years, and is not transformable into it. 6. The James is characterised by (a) an earth connection, (b) unequal capacitor values at top and bottom, (c) log potentiometers, and (d) a 26dB insertion loss. 7. The Baxandall is characterised by (a) an NFB connection, (b) equal capacitor values top and bottom, (c) linear potentiometers, and (d) 0dB insertion loss. NB Peter Baxandall did not 'pioneer audio electronics'. It was already a going concern when he was still in short pants. He certainly made major contributions to it: not the same thing.

@barrymayson2492

Жыл бұрын

Hi thanks for for input I must admit I would not have researched it any further with out your input. I have gone back to read his original article and clearly it does say about the negative feedback being needed. I always thought it was just an amplifier stage to overcome the 20 odd db loss the filter part introduced so have learnt something today. Also had a bad day with an amplifier I was building that did not want to work!! Which is why I was searching for the Baxandall circuit as needed some controls. Thanks again.