Active crossover

ivan-UTN-ARG · 2nd December 2007, 03:36 AM

hi,

I'm looking for a simple schematic of a 2 way 12dB/oct active

crossover with 12AU7 or 6CG7

the crosover frecuency should be 2khz (aprox).

planet10 · 2nd December 2007, 04:37 AM

http://t-linespeakers.org/tubes/xos.html

dave

soundbrigade · 2nd December 2007, 09:06 AM

You can download a X-over designer from Elektor Electronics:
Tube-Based Crossover
Gives you a PCB-designer as well.

mashaffer · 3rd December 2007, 12:39 AM

A related question. It has been a looooooooonnnnnnnnnngg time since linear circuit analysis class. Can anyone explain how to derive the transfer function for that 3rd order LP as shown in the above link? Does one have to model the tube or can you somehow derive the voltage division of the ladder network and then layer on the effect of the feedback capacitor?

I would like to understand this circuit well enough to move poles around and also adapt it to sand (sorry I got lots o sand and low voltage power transformers on hand on no tube stuff yet).

mike

2nd December 2007, 03:36 AM	#1
ivan-UTN-ARG diyAudio Member Join Date: Jun 2007	Active crossover hi, I'm looking for a simple schematic of a 2 way 12dB/oct active crossover with 12AU7 or 6CG7 the crosover frecuency should be 2khz (aprox).

2nd December 2007, 04:37 AM	#2
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 5	http://t-linespeakers.org/tubes/xos.html dave __________________ community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

2nd December 2007, 09:06 AM	#3
soundbrigade diyAudio Member Join Date: Feb 2006 Location: Vaenersborg, Sweden	You can download a X-over designer from Elektor Electronics: Tube-Based Crossover Gives you a PCB-designer as well. __________________ /Magnus Due to economical cutbacks, the light at the end of the tunnel has to be switched off.

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3rd December 2007, 12:39 AM	#4
mashaffer diyAudio Member Join Date: Jun 2004 Location: Indiana	A related question. It has been a looooooooonnnnnnnnnngg time since linear circuit analysis class. Can anyone explain how to derive the transfer function for that 3rd order LP as shown in the above link? Does one have to model the tube or can you somehow derive the voltage division of the ladder network and then layer on the effect of the feedback capacitor? I would like to understand this circuit well enough to move poles around and also adapt it to sand (sorry I got lots o sand and low voltage power transformers on hand on no tube stuff yet). mike

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