Here's what I am wondering....

Posted by Lew (A) on July 27, 2016 at 20:26:42

In Reply to: RE: Was there hiss before you removed those output caps? posted by Tweaker456 on July 27, 2016 at 18:05:02:

Is it possible that in your zeal to use the most robust possible parts, in terms of voltage and power ratings, that you've stuffed some physically over-sized parts into the chassis, especially capacitors, such that you then had to run much longer than original length leads from the new parts to the PCB or wherever they are supposed to connect? If so, this creates an antenna for RF, every time you do it. And hiss can result. I don't know who wrote that "hiss" is by definition a 3KHz noise (as you mentioned), but that is not far off the range where it might lie. You obviously cannot filter that out without losing a lot of music, which defeats your whole purpose in tweaking. I suggest you go back to the drawing board and take a look at whether you have some long leads in the circuit that are picking up stuff and amplifying it. And IF you still wish to install a filter, it had better be an RC type, not just a C, in this frequency range. Otherwise, your amplifier will be looking at a dead short at frequencies above cut-off. But fix the core problem is my recommendation. Then you won't need no stinkin' filter.

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Follow Ups Full Thread

Topic - Shunt across speaker terminals? - Tweaker456 00:16:41 07/27/16 (17)

NO ! - djk 15:41:08 07/28/16 (0)

High Definition Links - Lew 09:02:24 07/27/16 (15)

Sounds like a Zobel network. nt. - Cougar 11:28:13 07/27/16 (1)

RE: Sounds like a Zobel network, but it ain't - Lew 20:16:27 07/27/16 (0)

RE: High Definition Links - Tweaker456 10:38:56 07/27/16 (12)

Was there hiss before you removed those output caps? - Cougar 17:06:39 07/27/16 (5)

RE: Was there hiss before you removed those output caps? - gusser 17:50:49 07/27/16 (4)

RE: Was there hiss before you removed those output caps? - Tweaker456 18:05:02 07/27/16 (3)

Here's what I am wondering.... - Lew 20:26:42 07/27/16 (2)

RE: Here's what I am wondering.... - Tweaker456 20:58:20 07/27/16 (1)

And the CDP is completely bone stock, un-tweaked? - Lew 06:53:17 07/28/16 (0)

Hiss - Awe-d-o-file 14:37:55 07/27/16 (0)

That's not exactly hiss your are hearing! - gusser 14:37:42 07/27/16 (3)

RE: That's not exactly hiss your are hearing! - Tweaker456 16:50:40 07/27/16 (2)

Ok, I didn't see this until I was done posting my other reply. - Cougar 17:20:01 07/27/16 (1)

RE: Ok, I didn't see this until I was done posting my other reply. - Tweaker456 17:52:02 07/27/16 (0)

RE: High Definition Links - ahendler 12:46:43 07/27/16 (0)

Follow Ups

Here's what I am wondering.... - Lew 20:26:42 07/27/16 (2)

RE: Here's what I am wondering.... - Tweaker456 20:58:20 07/27/16 (1)

And the CDP is completely bone stock, un-tweaked? - Lew 06:53:17 07/28/16 (0)

Here's what I am wondering....

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