Felix project

Big Red Machine · « **Reply #280 on:** 20 Oct 2010, 02:44 pm »

Quoted GBB:

"I listed the CMC part number. A quick google search would have turned up the following data from Coilcraft's website. Use the CMC with the appropriate ratings for your application. As others have noted, the current draw of the Squeezebox is minimal, so the 3717 seemed like the right choice here.
---Gary

Common Diff. DCR Volt. Amp.
Mode L Mode L
P3717-A 25.0 1000 0.30 1500 3
Q4007-A 4.5 150 0.06 1500 5
Q4018-A 1.5 35 0.02 1500 10"

tull skull · « **Reply #281 on:** 20 Oct 2010, 06:57 pm »

Hey would these work for your projects? Not sure if price is too much but they look pretty nice!

http://www.vt4c.com/shop/program/main.php?cat_id=1038&group_id=2&hit_cat=

jtwrace · « **Reply #282 on:** 31 Oct 2010, 03:54 pm »

Quote from: Big Red Machine on 20 Oct 2010, 02:19 pm

This is really it? Pick the appropriate Coilcraft and follow this print? Use the same cap values for any Coilcraft module?

What brand caps are most guys using?

rajacat · « **Reply #283 on:** 31 Oct 2010, 04:10 pm »

I've built three Felix'es using the recommended parts. Now I'd like to build some more but using the very best AC rated caps and chokes. Does anybody have some ideas/suggestions for better parts or other possible tweaks?

-Roy (back from vacation)

TomS · « **Reply #284 on:** 31 Oct 2010, 04:50 pm »

Caps need to be AC rated, not just for voltage, but for failure mode across the power line (X1, X2) and/or from line to ground. Not always true for boutique caps.

Occam · « **Reply #285 on:** 31 Oct 2010, 05:06 pm »

Quote

It would be crazy expensive but http://www.soniccraft.com/sonicap_platinum.htm

This is my concern though. I'm not so sure that these caps would net a sonic difference. Anyone?

An imprudent choice for an X cap. Its low dc voltage rating makes it inappropriate for use across a 120vac line. It wouldn't come close to satisfying X2 requirements.
An X2 cap, rated for 250vac typically has a dc rating of 1400vdc to 2400vdc. Audience does use their 600vdc, not X2 approved, Teflon film caps in their North American Adept-T conditioners, but lacking a sufficiently high Vdc rated Teflon, do not offer a 240vac international version,
I'd think it would sound very good subjectively, prior to its failure.

FWIW,
Paul

jtwrace · « **Reply #286 on:** 31 Oct 2010, 05:09 pm »

Ahh. OK.

Can anyone post some links for the recommended caps then?

JDUBS · « **Reply #287 on:** 31 Oct 2010, 05:12 pm »

I would look at the group buy thread.

-Jim

jtwrace · « **Reply #288 on:** 31 Oct 2010, 05:18 pm »

Quote from: JDUBS on 31 Oct 2010, 05:12 pm

I would look at the group buy thread.

-Jim

http://www.audiocircle.com/index.php?topic=51941.0

It would be really nice if the PCB's were still available.

rajacat · « **Reply #289 on:** 31 Oct 2010, 06:04 pm »

Here's how AC member Jason of Virtue Audio did it several years ago. It might be difficult to integrate a DC blocker into this configuration though.

jtwrace · « **Reply #290 on:** 31 Oct 2010, 06:16 pm »

Quote from: rajacat on 31 Oct 2010, 06:04 pm

It might be difficult to integrate a DC blocker into this configuration though.

Is the DC blocker absolutely necessary? Have you guys found it to be needed on certain equipment? Or...?

poseidonsvoice · « **Reply #291 on:** 31 Oct 2010, 06:27 pm »

Anybody used this on their poweramps? I've only implemented them in linestages, dac, and other low level devices.

Thinking about it for my SDS 254 amp.

As for higher end caps, the only other one I can think of are the Mundorf Supreme variety where some are 800VAC/1200V DC rated. Others are only 425VAC/800VDC rated. Still not sure if that's enough though to qualify.

Anand.

rajacat · « **Reply #292 on:** 31 Oct 2010, 06:51 pm »

I'm interested in integrating Felixes into new powercords for my rebuilt Heathkit W5m monoblocks. I figure that if I'm going to build these, I might as well use the best parts available....within reason, of course.

Presently, I'm using them with my DAC and Bolder SB3. I have one that hasn't been implemented yet. I did notice improved SQ.

-Roy

jtwrace · « **Reply #293 on:** 31 Oct 2010, 07:35 pm »

Is this the most current PCB?

rajacat · « **Reply #294 on:** 31 Oct 2010, 07:52 pm »

That's it!

mgalusha · « **Reply #295 on:** 31 Oct 2010, 07:53 pm »

Yes, that is the only PCB that was manufactured for the group buy that Brad Judy did.

It's nearly as easy to use perf board and you can end up with a better result since the lead lengths can be shorter. While the phenolic stuff from Radio Shack is serviceable, All Electronics has some nice pad per hole fiberglass boards for $6.25ea and you could probably squeeze three from one board.

jtwrace · « **Reply #296 on:** 31 Oct 2010, 08:03 pm »

Can I pot the whole entire assembly?

JDUBS · « **Reply #297 on:** 31 Oct 2010, 08:44 pm »

You definitely don't need the PCB to build this. In fact, I can't think of an easier build without using one...there's not much to it.

-Jim

poseidonsvoice · « **Reply #298 on:** 31 Oct 2010, 09:36 pm »

Here is a list of all the parts that fit the PCB or if you are just interested in the recommended parts:

Capacitors: Two choices

Vishay/Roederstein F1778 X2 set of two 1.0 uF, two 0.1 uF and two 0.01 uF - $6.50/set
Vishay/BC MKP 338 X1 set of two 1.0 uF, two 0.1 uF and two 0.01 uF - $9/set

Common Mode Chokes: Two brands, multiple choices

CoilCraft Combination common and differential mode chokes (all three in this series fit the board):

P3717-A - 25mH 3A - $7.25
Q4007-A - 4.5mH 5A - $8.25
Q4018-A - 1.5mH 10A - $9.50

JW Miller 8100 series common mode chokes (models 8109 through 8118 fit the board)

8117-RC - 36mH 2.9A - $9
8111-RC - 12mH 4A - $7
8118-RC - 7.3mH 9.3A - $9

Best,
Anand.

jtwrace · « **Reply #299 on:** 2 Nov 2010, 10:04 pm »

Can one of you just confirm these for me? I just want to make sure I get the correct ones the first time.

And if so, someone else will have the links.

http://parts.digikey.com/1/parts/83577-cap-film-mkp-1uf-310vac-x2-20-bfc233826104.html

http://parts.digikey.com/1/parts/85251-cap-film-mkp-1uf-310vac-x2-20-bfc233820105.html

http://parts.digikey.com/1/parts/85249-cap-film-mkp-01uf-310vac-x2-20-bfc233820103.html