I will try multiple combos

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Posted by Maxamillion (A) on April 26, 2010 at 08:30:32

In Reply to: Yes, Max, I tried that too posted by bartc on April 26, 2010 at 07:41:29:

I have an array of silver mica values on order, and I already have .01uF and .001uF Multicaps on hand. I have lots of different values of PRP resistors, and I just ordered some 71ohm Texas Components TX2575 Z-foil resistors as well, to match the characteristic impedance of my speaker cables. Texas Components will make any value of resistor you want at no extra cost, but the resistors are pricy (~$10 each), so multiple parallel arrays can get $$$ fast!

The Z-foil resistors are especially well-suited to this job as they have a very low self-inductance. I measured a 100ohm PRP resistor at 10kHz and found 3.3uH of inductance, meaning the 100ohm PRP thus has a -3dB point of only 4.8MHZ. Since I'll be using a value of 71ohm, this could be a significant issue.

I'll post my results when I'm done - it will take 2 weeks for me to get the TX2575 resistors.

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Follow Ups Full Thread

Topic - Characteristic Impedance and RC Filters - Maxamillion 11:04:37 04/23/10 (17)

RE: Just use a resistor. - rick_m 14:10:20 04/24/10 (0)

Yes, but... - Al Sekela 14:40:56 04/23/10 (13)

Yes about those Parallel Networks... - Maxamillion 07:11:52 04/24/10 (11)

Procrustes' Bed - Al Sekela 15:32:56 04/24/10 (8)

I'm easily confused.... - rwiley 21:51:56 04/25/10 (7)

Yes, that's correct, but - Maxamillion 05:36:13 04/26/10 (6)

I've had good results with... - rwiley 08:00:30 04/26/10 (1)

RE: I've had good results with... - Maxamillion 13:31:47 04/26/10 (0)

Without the theory, in practice - bartc 06:15:09 04/26/10 (3)

Thanks, Bart. Have you tried... - Maxamillion 07:35:05 04/26/10 (2)

Yes, Max, I tried that too - bartc 07:41:29 04/26/10 (1)

I will try multiple combos - Maxamillion 08:30:32 04/26/10 (0)

That is a nature of capacitors after all... - Tweekeng 13:21:15 04/24/10 (1)

RE: That is a nature of capacitors after all... - Maxamillion 13:50:38 04/24/10 (0)

RE: Yes, but... - Maxamillion 19:31:40 04/23/10 (0)

Applies only to R-C filters on SPEAKER cables - bartc 11:22:38 04/23/10 (1)

RE: Applies only to R-C filters on SPEAKER cables - Jack D II 13:14:30 04/27/10 (0)

Follow Ups

I will try multiple combos - Maxamillion 08:30:32 04/26/10 (0)

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