I started a proposed parts list to build my own Model 19 crossovers. I am trying to keep as close to the same parts as Altec used but some things are not specified in the schematic.

The inductors used in the stock crossovers are iron core, these are air core. Does that make any difference?

I have a question concerning the wire gauge, I think that 18AWG should be fine but I may be off basis on that. I'm not an EE so would the more experienced folks on here chime in please? Looking at the schematics I see that both the high and low frequency's pass through inductor L1, maybe the heavier but costlier 14AWG would be better?

C1 and C4 are not exact values, I could not find exact matches. The ones I picked out are 5% tolerance. Will these be ok or should I stack 2 capacitors to get the exact value like I did for C3?

R2 and R4 are not exact values, I could not find exact matches. The ones I picked out are 2% tolerance. Again, is this close enough?

I will update this as answers come in. I know that the rough cost to build two crossovers using this parts order is about $215.00. I am looking to keep this a decent quality build and not use over the top components. Looking at fancy pants caps and inductor's I could see this easily costing over 1000.00 bucks to build. Not looking for that. Not saying that you shouldn't do it, I just can't afford it. Another member here is looking to do the same as me.
Help me come up with a reasonable cost DIY crossover build.
Thanks for any input.

BillWojo



All part numbers are from Parts Express unless otherwise noted.

Capacitors: Solen or Jantzen (C4 is a Jantzen, no close value in a Solens)

C1 8mfd---8.2mfd PN: 027-564 $6.73 each
C2 16mfd---16mfd PN: 027-578 $9.29 each
C3 21mfd---11mfd PN: 027-571 $7.94 each Note: To get 21 mfd, use both the 10mf and
11mfd caps wired in parallel.
10mfd PN: 027-568 $7.50 each
C4 6mfd---6.2mfd PN: 027-558 $4.73

Inductors: Jantzen

L1 0.3mH----0.3mH 18AWG $6.70
Or use heavier gauge at additional cost
0.3mH 14AWG $14.41
L2 2.7mH----2.7mH 18AWG $16.48
L3 0.77mH--0.75mH 18AWG $7.81 Note: 0.77mH is not a stock component.

Resistors: R2,4,5,6 are non inductive resistors, Dayton Brand

R1 + R3 8ohm L-Pad----8ohm, 100 Watt PN: 260-262 $12.95 each (includes knob, hardware and plate)
R2 + R4 3.9 ohm, 10 Watt---4.0 ohm, 10 Watt PN: 004-4 $1.38 each (could not find 3.9 ohm)
R5 2ohm, 10 Watt------2.0 ohm, 10 Watt PN: 004-2 $1.38 each
R6 3ohm, 10 Watt------3.0 ohm, 10 Watt PN: 004-3 $1.38 each