SSS Step filters - Here's what I think

Dumble schematics, designs, pictures. Only members may post files here.

Moderators: pompeiisneaks, Structo, mhuss, HeeBGB

Post Reply
User avatar
martin manning
Posts: 7881
Joined: Sun Jul 06, 2008 12:43 am
Location: 39.1N, 84.5W

SSS Step filters - Here's what I think

Post by martin manning » Mon Apr 10, 2017 11:45 am

The different versions of the step filters in SSS schematics published here don't seem to make functional sense. Attached is a version (or a correction?) that has a more reasonable and graduated response on the treble side. The key difference is the 0.003 cap going to ground is tied to the treble switch pole, which eliminates excessive treble that results when it is isolated.
You do not have the required permissions to view the files attached to this post.

Bombacaototal
Posts: 566
Joined: Thu Oct 06, 2016 5:53 am

Re: SSS Step filters - Here's what I think

Post by Bombacaototal » Fri Apr 21, 2017 9:56 pm

Hi Martin, just one question on the filter: What is the function of the 100K to ground. Is it impacting only the treble cut POLE or does it control the gain of the entire filter circuit by leaking signal to ground? What I am interested in understanding is what woud happen for example if one uses higher resistors like 200K or even 300K as ground or lower like 50k

User avatar
martin manning
Posts: 7881
Joined: Sun Jul 06, 2008 12:43 am
Location: 39.1N, 84.5W

Re: SSS Step filters - Here's what I think

Post by martin manning » Mon Apr 24, 2017 6:54 am

Increasing that resistor will increase the bass.

Bombacaototal
Posts: 566
Joined: Thu Oct 06, 2016 5:53 am

Re: SSS Step filters - Here's what I think

Post by Bombacaototal » Mon Apr 24, 2017 7:23 am

martin manning wrote:
Mon Apr 24, 2017 6:54 am
Increasing that resistor will increase the bass.
Thanks Martin. In my case I have it wired as Treble and Bass cut (so the other way around compared to your design). This would then mean that changing the resistor would decrease bass, or it does not really matter?

For some reason I thought it would impact more the high filter than the low

User avatar
martin manning
Posts: 7881
Joined: Sun Jul 06, 2008 12:43 am
Location: 39.1N, 84.5W

Re: SSS Step filters - Here's what I think

Post by martin manning » Fri Nov 03, 2017 11:22 am

Some tweaking of resistor and cap values to even out the steps and make the response more symmetrical.
You do not have the required permissions to view the files attached to this post.

dcribbs1412
Posts: 1278
Joined: Wed Jun 11, 2008 6:56 pm
Location: AZ

Re: SSS Step filters - Here's what I think

Post by dcribbs1412 » Fri Nov 03, 2017 4:30 pm

Thanks Martin
Appreciate your time and work

D

Post Reply

Who is online

Users browsing this forum: No registered users and 3 guests