Looking for an Altec 846A Valencia dividing network sch.

**stereo_dog** · January 9th, 2013, 08:03 AM

Good morning. I am trying to find a schematic for the Altec 846a dividing network. I am in the process of restoring a pair and would like to "freshen-up" the dividing network or build a new crossover. Any assistance would be greatly appreciated.

Joe

**Earl K** · January 9th, 2013, 08:38 AM

Originally Posted by stereo_dog

Good morning. I am trying to find a schematic for the Altec 846a dividing network. I am in the process of restoring a pair and would like to "freshen-up" the dividing network or build a new crossover. Any assistance would be greatly appreciated.

Joe

Here's the schematic for the N800F .

**stereo_dog** · January 9th, 2013, 08:56 AM

Very nice. Thank-you.

**HeathKitPat** · January 12th, 2013, 09:52 AM

Don't forget to post pictures and results when you get done with your project!!Crossovers.jpg Crossovers2.jpg

**stereo_dog** · January 12th, 2013, 11:20 PM

Originally Posted by HeathKitPat

Don't forget to post pictures and results when you get done with your project!!Crossovers.jpg Crossovers2.jpg

Those look familiar... Parts are ordered. Should start building, soon.

**Altec Best** · January 13th, 2013, 12:06 AM

Originally Posted by Earl K

Here's the schematic for the N800F .

Thanks Earl for helping out a new member.

Yup we love lots of Pics here...

**HeathKitPat** · January 13th, 2013, 09:41 AM

Originally Posted by stereo_dog

Those look familiar... Parts are ordered. Should start building, soon.

Can't wait to hear (from you) your results (only wish we could hear them through the forum). There is debate about this subject, but I believe they didn't really start to sound good until the capacitors settled in. After listening on and off for a day or two I swear the sound got better!

**TerryE** · February 18th, 2013, 03:03 PM

Hi,

I can't find a source for the 25 Ohm L-Pad in this crossover diagram. Can someone recommend a place to buy it? I've tried Parts Express and Madisound. A part number would be great too.

Thanks in advance,

Terry

**LICORNE** · February 19th, 2013, 02:55 PM

**HeathKitPat** · February 21st, 2013, 10:22 PM

Originally Posted by TerryE

Hi,

I can't find a source for the 25 Ohm L-Pad in this crossover diagram. Can someone recommend a place to buy it? I've tried Parts Express and Madisound. A part number would be great too.

Thanks in advance,

Terry

The original design schematic doesn't use and Lpad. What you are looking at is a 25 ohm variable resistor. Parts express has a 16ohm Lpad #260-248 this is what I used in place of the variable resistor (potentiometer) that Altec Used.. if you look at the pictures I posted I also remote mounted my new crossovers so I drilled out the back of the cabinets to accomodate the Lpad mounts. IT was a nice clean installation that I was very happy with. Also I omitted the 20ohm R1 resistor.

- - - Updated - - -

Originally Posted by LICORNE

The schematic for this crossover (N800K) appears to be designed for 8ohms.. it does however show the Lpad in place.