4344 BUILD, and some questions for the pros :)

[jlwitherell]

Cpl more pics.. Getting going on the divider network

[ivica]

Ok, another newbie question. Anyone have a good link to good 3mOhm resistors? I picked some up locally but the leads are hair thin and I'd like something a little more robust if possible. Martin's above appear to be beefier, but maybe it's just the pic?

Hi ,
Why so many wooden nuts for the binding post plane, and how do plan to mask them?


ivica

[richluvsound]

The t-nuts are designed to go inside ?

Rich

[Odd]

I think the 3 Mohm you have is ok. There is no current through them.

[martin2395]

Exactly, my resistors are indeed beefier but in comparison I'm using 0.3mm2 wire with sillicone insulation because it's very supple.

My networks are more tricky to build as I don't have the correct cap values available in EU (At least, I can't find them).
So for example for my 2x36uF (I build 3155 networks) I have to use 4x18uF (2x parallel and then in series).

[jlwitherell]

Hi ,
Why so many wooden nuts for the binding post plane, and how do plan to mask them?
ivica

I was going for the industrial look? Yeah, when drilling them I figured it may be overkill. Ah-well, if the worst mess up is having to unscrew/screw a couple extra bolts when needing to remove the plate, I'll call it a win.. Just going to paint over them.

[jlwitherell]

The t-nuts are designed to go inside ?

Rich

I know, but my plate is hard plastic and, although I didn't try, it seemed that it'd be too difficult to get them installed correctly into the material. I figure no biggy, just have to remove woofer to access, which I'd have to do anyway if I for some reason needed to remove the plate.

[jlwitherell]

I think the 3 Mohm you have is ok. There is no current through them.

Ok, thanks - I guess I'll run them! Thanks Odd.

[jlwitherell]

Exactly, my resistors are indeed beefier but in comparison I'm using 0.3mm2 wire with sillicone insulation because it's very supple.

My networks are more tricky to build as I don't have the correct cap values available in EU (At least, I can't find them).
So for example for my 2x36uF (I build 3155 networks) I have to use 4x18uF (2x parallel and then in series).

Thanks for clarifying. Man, that's a bummer, these networks are challenging and time consuming (and large) enough as it is!!

[martin2395]

It's because those are American coil/cap values

I bought Jatzen Crosscaps (nothing really fancy but good as a starting point) and they don't have the values like 36uF, 3.6uF or even 2uF.
Even the coils were actually a special order.

I decided to take the route - "Just follow the schematics, trust the one who designed it and it will be all good"

[jlwitherell]

I decided to take the route - "Just follow the schematics, trust the one who designed it and it will be all good"

I totally get it. I've read somewhere that "close counts" when it comes to cap/inductor values, but I'd do the same thing and just make it right

[jlwitherell]

Running into some confusion regarding the 2420 driver. Was ordering some radian replacement 8ohm diaphragms from parts express, when received they measure 3.9 and 4 oHm respectively. I do see that there are many drivers listed as 16 ohms on ebay, but which measure in the 6 to 8 ohm range, which is what I thought the 8 ohm diamphrams should measure. I am building giskards (I posted earlier in this thread) designed crossover and just wondering if these are the right diaphragms or not? All of my L-pads are new, and 8 Ohm. Thanks!

[Odd]

Running into some confusion regarding the 2420 driver. Was ordering some radian replacement 8ohm diaphragms from parts express, when received they measure 3.9 and 4 oHm respectively. I do see that there are many drivers listed as 16 ohms on ebay, but which measure in the 6 to 8 ohm range, which is what I thought the 8 ohm diamphrams should measure. I am building giskards (I posted earlier in this thread) designed crossover and just wondering if these are the right diaphragms or not? All of my L-pads are new, and 8 Ohm. Thanks!

You measure the DCR, the value is normal for 8 ohm driver.
Crossover is designed for 16 ohm driver. Can they be exchanged for 16 Ohm?

If to remove the 20 ohm resistance after the L-pad I think it will work with 8 ohm.

Maybe 4313B can explain.

[jlwitherell]

If to remove the 20 ohm resistance after the L-pad I think it will work with 8 ohm.

Maybe 4313B can explain.

That's what I was thinking, well, they're sending me ones that presumably read 8 ohms. But I guess I'm still not sure if this is correct for the crossover schematic and an 8 Ohm L-Pad (the crossover design does indicate 8 Ohm L-pad, but does that consider the diaphragm at 4 or 8 ohm??)

[Odd]

You need to stop worrying so much.
Schematic is correct, many with a lot of knowledge, has built this before you successfully.