active crossover Kaneda

[adason]

Anybody built this active crossover? I like the elegant high pass, so I am tempted to try. I may not have exact transistors though.

 

[Nelson Pass]

I can't read all the capacitor values. Do you have a better copy?

 

[adason]

its from this link Nelson

Filtre électronique triphonique de type Kanéda (JC.Gaertner)

 

[Nelson Pass]

Thanks. Fortunately the link also has a stuffing diagram.

You would definitely want to get your component values
from that.

 

[adason]

Yes, i plan to verify and recalculate critical cap values, since i plan to use ~150Hz crossover frequency. I will measure exact fr response.

I have few questions about jfets. I do not have K30 or N5465. However, i do have some others. Nelson, please take a look and let me know if any of these could be used.
J103/K246 matched pairs, i got few
Mpf102 got plenty
N4392 few left
N5460/N5457 matched pairs quite a few
Your help if much appreciated.

 

[Nelson Pass]

I ran some sims on the filters, and when I have time I'll post the results.

It's the usual situation, which is that no crossover is ideal for more than
one design - they all have to be tweaked to accommodate the phase and
amplitude response of the drivers.

I did not see in the article what the intended loudspeakers are. Do you
happen to know?

 

[Zen Mod]

Pa , you have those , in some files from moons ago - folder Revue Audiophile 1977-1995

 

[Soundhappy]

I can't read all the capacitor values. Do you have a better copy?

Lucky i get complete " L' Audiophile " paper edition,
funny on bench some vintage resistor made by JOY
Kind regards

 

[Soundhappy]

I did not see in the article what the intended loudspeakers are. Do you happen to know?

More informations about speakers used with Kaneda active filters are in "L'Audiophile " nr 23

" Little big enceinte "
High tweeter | Audax HD 100 D25 BAR
Medium | Audax HF 13 HSM 2CA 12

Low frequence central sub with Audax HD 33 S 66 or another candidate is Focal 10 C 01

 

[adason]

Thanks Soundhappy for all the information.

 

[Soundhappy]

Kaneda 3 way active filter from " Stereo Technic " 1974

Thanks Soundhappy for all the information.

Thanks Adason indeed for interesting active filters thread
Version in Your post #1 was dedicatet originaly for small 2.1 audio system.
Sunday morning in my library I find Kaneda publication in " Stereo Technic " january 1974
about 3 voice and 4 voice active filters DIY with filters and psu schematics and first prototype builds photo's

 

[Soundhappy]

Kaneda 4 way active filter from " Stereo Technic " 1974

Original Kaneda 4 way active filter DIY publication

 

[Nelson Pass]

Over in the PL forum I was pointing out that the schematic in the first post
here is interesting because it has two buffer stages, with filter circuits in
between, that use a depletion mode Jfet self-biased with a bipolar transistor.

The first is an N channel Jfet with PNP bipolar and the 2nd is a P ch Jfet with
NPN bipolar. Presumably this was for cancellation of the opposite 2nd harmonic
distortion of both buffers.

 

[adason]

I made quick prototype today, and it seems to be working ok. I have not made any measurement, as my equipment is very limited. However, it sounds just fine.

 

[adason]

I made few active crossovers with BJT in the past, 2way, 3way, like Soundhappy just posted. Worked ok, just did not sound as good as B1 and JLH buffer based crossovers.

 

[adason]

Over in the PL forum I was pointing out that the schematic in the first post
here is interesting because it has two buffer stages, with filter circuits in
between, that use a depletion mode Jfet self-biased with a bipolar transistor.

The first is an N channel Jfet with PNP bipolar and the 2nd is a P ch Jfet with
NPN bipolar. Presumably this was for cancellation of the opposite 2nd harmonic
distortion of both buffers.

Yes, it seems like a well designed circuit.
I guess there should be one more buffer on the output, since it uses one more high pass, to decouple it from next stage...

 

[Jonathan Bright]

Hi adason you mentioned JLH buffers. Can you be a bit more specific pls?
I have a lot of JLH schematics and I was wondering which one you were referring to.
I think I recall see both a complimentary BP transitor and a JFet based buffer but am getting forgetful these days......perhaps they were combined......
Grateful for any further enlightenment.
Cheers Jonathan

 

[adason]

Hi adason you mentioned JLH buffers. Can you be a bit more specific pls?
I have a lot of JLH schematics and I was wondering which one you were referring to.
I think I recall see both a complimentary BP transitor and a JFet based buffer but am getting forgetful these days......perhaps they were combined......
Grateful for any further enlightenment.
Cheers Jonathan

 

[Jonathan Bright]

Thank you. JB

 

[gadut]

Original Kaneda 4 way active filter DIY publication

I'm glad that you are back