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Old 2nd October 2012, 07:49 PM   #431
Marra is offline Marra  United Kingdom
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Even with a magnifying glass I struggled they have a mind of there own.
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Old 2nd October 2012, 08:21 PM   #432
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Well sad to say I have been on hold for the past six weeks dealing with familial obligations. This is hopefully at or near it's end and I can get back to finishing this project. But where I am currently is one board is nearly done being populated. This is my first outing with smd components and it was interesting/fun. I believe all went well but will know for sure once powered up. Component wise I used all suggested best parts from the BOM with a couple of exceptions. For C9 I have the standard BK but it is the 4(?) volt version so I will begin with the Nichicon FG. For C13 I have the K71-4. Transformers are the AN3225 300ma's. If all goes well I will give these a listen in a week or two.

Paul
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Old 2nd October 2012, 09:01 PM   #433
bcmbob is offline bcmbob  United States
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Thanks for the update Paul. Nobody is pushing here so - - -whatever time it takes. Glad you are making progress.

Dario told me he can tell whenever someone starts the SMDs cause he feels a phantom finger thump in the middle of his forehead. I think it's a Dune thing.
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Old 2nd October 2012, 09:04 PM   #434
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How do you start with component choices when you start with a new project? For example, do you just assume that Susumu's are high quality and will be a good choice for SMD resistors? How do you pick?
Absolutely not!

I select listening from a variety of components.

This bouquet of parts is pre-selected according availability from Mouser/PCX/Distrelec/RS Components and sometimes eBay.

Obviously parts with good reports enters the bouquet too.

The one that sounds better become part of the BOM.

Regarding Susumus, which have very good reports, I've compared them to other industrial and audiophile parts and they've come second only to Vishay bulk foil.

Vishays are incredibly neutral, detailed, smooth while Susumus are inferior but not much and with a touch of wamth more.

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Originally Posted by lehmanhill View Post
Do you think, this project will need a little warmth, but mostly needs neutral components? I am curious to understand the start of your process.
I'm not sure to understand.. Do you think some warmth is needed for the FE?

The input cap C13 has a big role regarding warmth, the K71-4 are a bit on the cold side of neutral.

BTW my main goal when selecting parts is neutrality, detail, naturalness, lack of harshness, full fleshed sound.

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Originally Posted by lehmanhill View Post
In the meantime, I learned that there are Fremen script numbers, at least 1 through 6, and a partial alphabet of the Fremen language. Maybe, I should letter the chassis in Fremen.
It would be a cool thing...

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Finally, the bass issue has been solved
Fine, I'm happy for you

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Decided that I could'nt wait and a package arrived this morning from Farnell and as todays plans had fallen through I warmed up the soldering iron.
Cool

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You guys must have better eyesight and steadier hands than me it took ages to solder the smd's and by the end of the afternoon they were being called more than that.
If SMD soldering took you a couple of hours, you're perfectly average.

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Originally Posted by Marra View Post
Has any one tried Kendiel K05 caps for C101 & C201?
Do you have any of the RJH caps left by any chance Dario?
Sadly, no. But you can buy them directly from Elfa

Kendeill are very well regarded caps, they'll probaly sound great but I never tried them.

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Originally Posted by PMeade View Post
This is my first outing with smd components and it was interesting/fun.
I do agree, now I like a lot SMD soldering.

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Originally Posted by PMeade View Post
For C9 I have the standard BK but it is the 4(?) volt version so I will begin with the Nichicon FG.
It's a safe and smart approach.

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Originally Posted by PMeade View Post
For C13 I have the K71-4.
Fine

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Originally Posted by PMeade View Post
If all goes well I will give these a listen in a week or two.
I'll read your comments with interest.
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Old 2nd October 2012, 09:08 PM   #435
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Dario told me he can tell whenever someone starts the SMDs cause he feels a phantom finger thump in the middle of his forehead. I think it's a Dune thing.
Do yo mean that headaches I''ve had in these last days are due to this?

I was sure they were due to nicotine abstinence...
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Old 2nd October 2012, 09:12 PM   #436
bcmbob is offline bcmbob  United States
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Don't quit quitting !!! You have the support of us all.
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Last edited by bcmbob; 2nd October 2012 at 09:16 PM.
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Old 2nd October 2012, 10:14 PM   #437
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Quote:
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I'm not sure to understand.. Do you think some warmth is needed for the FE?
Dario,

First of all, sorry to hear about your headaches and other nicotine side effects, but keep the faith. We are with you in spirit.

As for the quote above, I apologize for the confusion. I think the FE sounds fine, just like it is. I am very happy with mine.

My questions about how you choose components was because I am about to start a new crossover and feedback board for my subwoofer. I wanted to learn how you started component selection.

As a one-off board, I want to get good components into it, but probably won't have time to audition as many as you have. Now that you guys have taught me how to solder SMD, I will use SMD components where possible. I was hoping for a short cut to selecting good components, but as you say, it takes a bouquet to get the right ones.

In the meantime, I've already learned a lot about which components to start with. Perhaps, once I have confirmed my component values, I can PM you for suggestions on capacitors and resistors.

Thank you, sensei.

Jac
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Old 2nd October 2012, 10:19 PM   #438
bcmbob is offline bcmbob  United States
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Jac, Send madisonears (Tom E.) a PM. He has good first hand experience with an active crossover and the MyRef family. He knows his stuff.
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Old 2nd October 2012, 10:26 PM   #439
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Bob,

Thanks for the suggestion. I know that Tom knows his stuff.

In this case, I already have an active crossover design that I like a lot. I used SoundEasy software to shape the crossover to match both my sub and my satellites in both phase and amplitude.

The board project is to redo the circuit using better components, power supply, and as a balanced signal. It's kind of like what Dario did with MyRef, just a different part of the chain.

Wish me luck though. There are a lot of things that can go wrong as Tom has already warned me.

Jac
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Old 2nd October 2012, 10:28 PM   #440
bcmbob is offline bcmbob  United States
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OK, "Good Luck"
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