Zaphs W3-871 notch filter? - diyAudio
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Old 9th June 2005, 02:08 PM   #1
Kram is offline Kram  United Kingdom
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Default Zaphs W3-871 notch filter?

Hello,

can anyone tell me if these are the same values that Zaph used in his notch filter for the Tangband W3-871?

6.8R,
3.3uF
0.7mH air core,
were there any special requirements reguarding the inductor DCR?

Thanks if anyone can help
Mark.
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Old 9th June 2005, 02:17 PM   #2
Vikash is offline Vikash  United Kingdom
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Hi Mark,

According to his article, and if you're using the first box suggested then the notch requirements are:

L1 - 0.7mH, 19 ga air core (.41 dcr)
R1 - 6.8 ohm, 10 watt non-inducitive
C1 - 8.2 mfd poly

The second/third boxes use C1 - 3.3 mfd poly

If you haven't got the article then email Zaph, I'm sure he'll email it to you, or I can email it you for that matter if Zaph has no objections.
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Old 9th June 2005, 03:53 PM   #3
Kram is offline Kram  United Kingdom
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I am building the one shown in the diagram below.

It would be nice if you could send me the article, for some reason I only saved the box designes and not the crossover designs, probably assuming that Zaph wouldnt remove them from his website.

Thanks
Mark
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Old 9th June 2005, 04:07 PM   #4
Vikash is offline Vikash  United Kingdom
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That is the first design (his recommended one) which uses the following crossover:
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Old 9th June 2005, 04:47 PM   #5
Kram is offline Kram  United Kingdom
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Thanks Vikash

I will finally be able to complete this simple project after almost 2 years

Thanks
Mark
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Old 10th June 2005, 04:33 PM   #6
SQ Kid is offline SQ Kid  United States
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seeing we're already on the topic, anyone have the filter diagram for zaph's taller box? thanks
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Old 11th June 2005, 12:39 AM   #7
Kram is offline Kram  United Kingdom
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SQ Kid,

I will have it in the saved web page that Vikash emailed to me earlier, but I am away from home and my PC for the weekend so I hope you can wait that long

Mark
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Old 11th June 2005, 05:53 AM   #8
SQ Kid is offline SQ Kid  United States
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i've gone almost a year without it, so a weekend is nothing
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Old 11th June 2005, 03:18 PM   #9
theNoid is offline theNoid  United States
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Have you tried the 871 without the SBC network? Just wondering is all...

Noidster
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Old 12th June 2005, 03:01 AM   #10
SQ Kid is offline SQ Kid  United States
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me?

if so, yeah, i've been running them in zaph's taller box design for about a year now. they are being powered by my pc speaker system (they took the place of the fronts in a cambridge soundworks 4.1 setup). i would not doubt that there's some sort of crossover/filter setup built into the speaker system, but they sound great the way they are now. built a 5.1 setup for my parents w/o a notch and they sound very good (also a different enclosure design). my next setup is a 6.1 B3S setup using cyburg needle enclosures for the fronts. we'll see how that goes.
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