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active crossover Kaneda
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Old 4th February 2018, 02:57 PM   #11
Soundhappy is offline Soundhappy  France
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Default Kaneda 3 way active filter from " Stereo Technic " 1974

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Originally Posted by adason View Post
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
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Old 4th February 2018, 03:22 PM   #12
Soundhappy is offline Soundhappy  France
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Default Kaneda 4 way active filter from " Stereo Technic " 1974

Original Kaneda 4 way active filter DIY publication
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Old 4th February 2018, 05:10 PM   #13
Nelson Pass is offline Nelson Pass  United States
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active crossover Kaneda
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.
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Old 4th February 2018, 06:00 PM   #14
adason is offline adason  United States
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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.
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Old 4th February 2018, 06:04 PM   #15
adason is offline adason  United States
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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.
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Old 4th February 2018, 06:12 PM   #16
adason is offline adason  United States
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Quote:
Originally Posted by Nelson Pass View Post
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...
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Old 4th February 2018, 11:14 PM   #17
Jonathan Bright is offline Jonathan Bright  Australia
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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
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Old 5th February 2018, 12:44 AM   #18
adason is offline adason  United States
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Quote:
Originally Posted by Jonathan Bright View Post
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
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Old 5th February 2018, 01:06 AM   #19
Jonathan Bright is offline Jonathan Bright  Australia
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Thank you. JB
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Old 5th February 2018, 01:51 AM   #20
gadut is offline gadut  Indonesia
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Quote:
Originally Posted by Soundhappy View Post
Original Kaneda 4 way active filter DIY publication
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