GroupDIY

Project Specific Discussions => Filters/Equalizers => Topic started by: elskardio on February 26, 2018, 01:21:16 PM

Title: BF-500 // Butterworth Filters in 500 Format
Post by: elskardio on February 26, 2018, 01:21:16 PM
Hi Guys,

A few months ago a colleague ask me if I could build a simple LPF & HPF in 500 format. Here's the result  ;)

- Independent In/Out switch for both bands
- 6 dB/oct switch for both bands (12 dB/oct. default)
- Bump function on the HPF (à la Harrison) = 5 dB (modified to 3 dB) resonance around the cutoff frequency.
- LED indicator on every switch

Cheers

Gabriel
Chambord Audio
--------------------------------------------

If you're interested in purchasing a BF-500 module,

you can place your order here: https://chambordaudio.com/product/bf-500-filters/


--------------------------------------------
(https://www.dropbox.com/s/0xqzyu1yagwou8e/BF-500_1.jpg?raw=1)
(https://www.dropbox.com/s/hyet0b9djt9igmp/BF-500_2.jpg?raw=1)

- Frequency response of the actual Hardware unit showing the 2 slopes and the Bump function of the HPF:

(https://www.dropbox.com/s/f2m127e8sm7ejmj/BF-500_Freq_Resp.jpg?raw=1)
Title: Re: BF-500 // Butterworth Filters in 500 Format
Post by: TwentyTrees on February 26, 2018, 03:34:26 PM
Beautiful design, Gabriel! I really love the front panel layout. Bravo!
Title: Re: BF-500 // Butterworth Filters in 500 Format
Post by: elskardio on February 26, 2018, 10:16:38 PM
Hi Andy,

Thank you for the comment.
Any progress on the new album?

Cheers

Beautiful design, Gabriel! I really love the front panel layout. Bravo!
Title: Re: BF-500 // Butterworth Filters in 500 Format
Post by: guze on February 27, 2018, 06:09:06 AM
very nice
Title: Re: BF-500 // Butterworth Filters in 500 Format
Post by: TwentyTrees on February 27, 2018, 02:52:05 PM
Hi Andy,

Thank you for the comment.
Any progress on the new album?

Cheers

Heh! The album’s going well thanks, if very slowly! As I always say, if a thing is worth doing, it’s worth over-doing...

If you were to offer kits of these, do you have a sense of how much you’d sell them for?

Andy
Title: Re: BF-500 // Butterworth Filters in 500 Format
Post by: dmp on February 27, 2018, 02:55:39 PM
Beautiful design
Title: Re: BF-500 // Butterworth Filters in 500 Format
Post by: Joechris on February 27, 2018, 05:21:46 PM
Yes, its beautiful!! I want two kits.
Hope you consider making a bax style eq with the same kind of layout..!
Best
Jo
Title: Re: BF-500 // Butterworth Filters in 500 Format
Post by: elskardio on February 28, 2018, 10:19:57 AM
Thanks guys for the comments.
Title: Re: BF-500 // Butterworth Filters in 500 Format
Post by: bobbenozzo on August 20, 2018, 05:13:48 PM
Really interesting! would it be possible to have the 12-18 dB/oct option?
The 18 dB/oct hi pass (like neve's) is very musical on bass, kick, and many other sources.
Title: Re: BF-500 // Butterworth Filters in 500 Format
Post by: Bonsaimaster on August 30, 2018, 03:16:34 PM
I'm in for two. Been looking for this exact thing.
Title: Re: BF-500 // Butterworth Filters in 500 Format
Post by: SKJGProject on August 30, 2018, 07:23:18 PM
In for two as well
Title: Re: BF-500 // Butterworth Filters in 500 Format
Post by: elskardio on August 31, 2018, 06:36:19 PM
Hi Guys,

nice to see some interest in the BF-500 ;)

For 10 kits or more, I could make a small batch.

I started a list of the members who showed interest in the first post.

If you would like to buy a kit, please let me know and I'll add your name to the list.

Cheers
Gabriel
Title: Re: BF-500 // Butterworth Filters in 500 Format
Post by: amassivetree on September 04, 2018, 12:39:49 PM
Looks good, I am also interested in a pair.
Title: Re: BF-500 // Butterworth Filters in 500 Format
Post by: kante1603 on September 05, 2018, 09:18:20 AM
Very nice indeed,well done!
May I ask for a rough kit price in case you‘d get ten or more orders (haven‘t found any yet)?
I/O is balanced I guess,may I ask how (looks like INA and DRV,but it‘s hard to see from the picture)?


Thank you in advance,


Udo.
Title: Re: BF-500 // Butterworth Filters in 500 Format
Post by: elskardio on September 05, 2018, 08:27:37 PM
Very nice indeed,well done!
May I ask for a rough kit price in case you‘d get ten or more orders (haven‘t found any yet)?
I/O is balanced I guess,may I ask how (looks like INA and DRV,but it‘s hard to see from the picture)?

Hi Udo,

Yes the I/O is balanced using the INA/DRV combo.

I'll try to calculate the kit price this week  ;)

Thanks
Gabriel
Title: Re: BF-500 // Butterworth Filters in 500 Format
Post by: bobbenozzo on September 06, 2018, 08:06:13 AM
I'm in for two.
Title: Re: BF-500 // Butterworth Filters in 500 Format **Partial Kit FEELER**
Post by: Mulmany on September 08, 2018, 09:59:03 AM
I'll take two.
Title: Re: BF-500 // Butterworth Filters in 500 Format **Partial Kit FEELER**
Post by: elskardio on September 11, 2018, 02:44:55 PM
Hi Guys,

just to clarify, I will collect payment the first week of October before ordering everything. I'll post the details at the end of the month.

Thanks
Title: Re: BF-500 // Butterworth Filters in 500 Format **Partial Kit FEELER**
Post by: Mulmany on October 12, 2018, 03:42:00 PM
Any word on this?
Title: Re: BF-500 // Butterworth Filters in 500 Format **Partial Kit FEELER**
Post by: elskardio on October 15, 2018, 12:51:14 PM
Hi guys,

sorry for the delayed response...  busy with work  ;)

5 members has shown interest in a pair of kits:

Bonsaimaster (confirmed)
SKJGProject (confirmed)
amassivetree 
bobbenozzo (confirmed)
Mulmany (confirmed)

If you're all on board, we have 10 kits and I will make it happen.

Please confirm with a reply.
Cheers
Title: Re: BF-500 // Butterworth Filters in 500 Format
Post by: Bonsaimaster on October 16, 2018, 12:40:21 PM
I'm in for 2.
Title: Re: BF-500 // Butterworth Filters in 500 Format
Post by: SKJGProject on October 16, 2018, 02:44:28 PM
still in
Title: Re: BF-500 // Butterworth Filters in 500 Format
Post by: bobbenozzo on October 18, 2018, 04:15:52 AM
I'm in for 2. Just a little question: is it possible to change Bump form 5dB to 3dB?
Title: Re: BF-500 // Butterworth Filters in 500 Format
Post by: elskardio on October 18, 2018, 10:05:20 AM
I'm in for 2. Just a little question: is it possible to change Bump form 5dB to 3dB?

Yes. I already did this modification to the pair I have in the studio ;)

You only need to change 1 resistor. I will provide both value for 5 dB and 3 dB bump.

Cheers
Title: Re: BF-500 // Butterworth Filters in 500 Format
Post by: Mulmany on October 20, 2018, 04:59:39 PM
I'm in.
Title: Re: BF-500 // Butterworth Filters in 500 Format
Post by: Bonsaimaster on November 02, 2018, 01:13:36 PM
Any word on this? Can we get the last guy to commit?
Title: Re: BF-500 // Butterworth Filters in 500 Format
Post by: elskardio on November 02, 2018, 03:59:15 PM
Any word on this? Can we get the last guy to commit?

Hi Guys,

Sorry I've been very busy with work and also taking care of my 3 month-old baby  ;D

I will make some kits. Probably before christmas... I'll keep you posted.

Cheers
Gabriel
Title: Re: BF-500 // Butterworth Filters in 500 Format
Post by: Id10t3qu3 on December 06, 2018, 08:34:35 AM
Can I be the one to the this thread over the edge for some Buttery action?  I'd like to get two as well.

Title: Re: BF-500 // Butterworth Filters in 500 Format
Post by: SKJGProject on January 13, 2019, 07:01:45 PM
Bump....please make this run happen soon!
Title: Re: BF-500 // Butterworth Filters in 500 Format
Post by: elskardio on January 20, 2019, 05:28:26 PM
Bump....please make this run happen soon!

I'm working on it  ;)

I'm planning to order the front panels this week. I'll keep your posted.

Cheers
Title: Re: BF-500 // Butterworth Filters in 500 Format ** KITS AVAILABLE **
Post by: SKJGProject on January 28, 2019, 07:25:18 PM
Still need 2...will pay within a few days, please keep 2 reserved
Title: Re: BF-500 // Butterworth Filters in 500 Format ** KITS AVAILABLE **
Post by: elskardio on January 28, 2019, 07:28:08 PM
Still need 2...will pay within a few days, please keep 2 reserved

Hi Seb,
2 kits reserved for you  ;)
Title: Re: BF-500 // Butterworth Filters in 500 Format ** KITS AVAILABLE **
Post by: Mulmany on January 30, 2019, 08:50:57 PM
Send payment for 2 kits. Thanks
Title: Re: BF-500 // Butterworth Filters in 500 Format ** KITS AVAILABLE **
Post by: elskardio on January 31, 2019, 08:45:02 AM
Send payment for 2 kits. Thanks

Payment received. Thanks
Title: Re: BF-500 // Butterworth Filters in 500 Format ** KITS AVAILABLE **
Post by: Id10t3qu3 on February 02, 2019, 03:26:38 AM
Paid for 2 as well!
Dan
Title: Re: BF-500 // Butterworth Filters in 500 Format ** KITS AVAILABLE **
Post by: elskardio on February 04, 2019, 12:08:17 PM
Hi guys,

I'm almost done with the build guide. Waiting for the front panels to assemble the kits.
Don't forget to make your payment to reserve yours ;)

Cheers


Title: Re: BF-500 // Butterworth Filters in 500 Format ** KITS AVAILABLE **
Post by: elskardio on February 14, 2019, 02:56:38 PM
Hi Guys,

I received the front panels today. I'll try to assemble the kits this weekend.

Thanks
Title: Re: BF-500 // Butterworth Filters in 500 Format ** KITS AVAILABLE **
Post by: Id10t3qu3 on February 25, 2019, 01:38:54 AM
Hi, checking in on this, I paid for an order for two and never received any confirmation that payment was received so any update would be appreciated.

Cheers
Dan
Title: Re: BF-500 // Butterworth Filters in 500 Format ** KITS AVAILABLE **
Post by: elskardio on February 25, 2019, 07:49:24 AM
Hi, checking in on this, I paid for an order for two and never received any confirmation that payment was received so any update would be appreciated.

Cheers
Dan

Hi Dan,

sorry about that. Yes I received your payment  ;)

The kits will ship this week. The Mouser Cart and the Build Guide will be sent by email.

Cheers
Gabriel
Title: Re: BF-500 // Butterworth Filters in 500 Format ** KITS AVAILABLE **
Post by: elskardio on February 27, 2019, 10:08:58 AM
Hi Guys,

only 6 partial kits left  ;)

Cheers
Gabriel
Title: Re: BF-500 // Butterworth Filters in 500 Format
Post by: elskardio on March 10, 2019, 02:26:44 PM
2 partial kits left.

After the BF-500 will be available assembled only.

Thanks
Title: Re: BF-500 // Butterworth Filters in 500 Format
Post by: elskardio on March 12, 2019, 06:28:47 PM
All kits sold.

If you're interested in buying an assembled module please contact me. GroupDIY members gets a discount ;)

Thanks
Title: Re: BF-500 // Butterworth Filters in 500 Format
Post by: elskardio on March 22, 2019, 10:14:06 AM
Hi guys,

just to clarify... the Bump function only works with the default 12dB/oct slope.

Cheers
Title: Re: BF-500 // Butterworth Filters in 500 Format
Post by: okgb on March 24, 2019, 09:22:42 PM
If anyone doesn't their partial kit I'll take it off your hands!
thanks for taking this on !
Title: Re: BF-500 // Butterworth Filters in 500 Format
Post by: elskardio on March 24, 2019, 09:49:33 PM
Hi Greg,
Your inbox is full...
Contact me by PM. I can arrange something for you.
Cheers
Title: Re: BF-500 // Butterworth Filters in 500 Format
Post by: Id10t3qu3 on March 31, 2019, 08:00:59 PM
Just wanted to give a big congratulations to Gabriel at Chambord Audio for developing this piece of kit- this was spectacularly designed, documented, and most importantly sounds great!  Those of you who haven't gotten around to building these yet are in for a treat- a huge amount of work went into these filters and it shows.
Title: Re: BF-500 // Butterworth Filters in 500 Format
Post by: elskardio on April 01, 2019, 12:35:13 PM
Just wanted to give a big congratulations to Gabriel at Chambord Audio for developing this piece of kit- this was spectacularly designed, documented, and most importantly sounds great!  Those of you who haven't gotten around to building these yet are in for a treat- a huge amount of work went into these filters and it shows.

Thank you Dan !
I'm glad you like the filters  ;)
Title: Re: BF-500 // Butterworth Filters in 500 Format
Post by: elskardio on November 06, 2019, 11:14:40 AM
Any interest in kits?

I might do a small batch in the following weeks.

Cheers
Title: Re: BF-500 // Butterworth Filters in 500 Format
Post by: kante1603 on November 06, 2019, 11:24:44 AM
Any interest in kits?

I might do a small batch in the following weeks.

Cheers
Yes!
Title: Re: BF-500 // Butterworth Filters in 500 Format
Post by: kante1603 on December 01, 2019, 11:57:41 AM
So finally I received 4 kits and built them yesterday.
They´re just great.
Everything is nicely layouted,it´s clean,it does what you expect from it.
Big knobs,very nice front panel,indicators on every switch,everything fits like a glove.
I prefer good filters over eqs often if not most of times.
The "bump" amount can be changed with one resistor.
Congrats Gabriel,you did a great job!
I can recommend this build for beginners,you´ll have a great tool in your rack,better than most stomp boxes and the likes,simple and efficient.
I´m happy!


Best regards,


Udo.


Pic attached.