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Chip Amps Amplifiers based on integrated circuits

My_Ref Fremen Edition RC - Build thread
My_Ref Fremen Edition RC - Build thread
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Old 16th August 2012, 11:58 PM   #131
lehmanhill is offline lehmanhill  United States
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Lightbulb Dual Bridge

Hi Klaus,

Thank you for your explanation and experience on dual versus single bridge. With two experts like you and Andrew, I accept the constant current. I will have to play in Spice, as you did, just because it is not obvious. In the end, that is one of the best things about DIY. I learn something every time.

Thank you very much.

Jac
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Old 20th August 2012, 05:18 PM   #132
atupi is offline atupi  Romania
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Default Before powering up ...

A preview of my work before connecting to toroids.
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File Type: jpg MyREF FE 001.jpg (504.3 KB, 323 views)
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Old 20th August 2012, 05:37 PM   #133
bcmbob is offline bcmbob  United States
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My_Ref Fremen Edition RC - Build thread
I see you went for some top choices. Looks great and anxious to hear about your audition.
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Old 20th August 2012, 06:06 PM   #134
ClaveFremen is offline ClaveFremen  Italy
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My_Ref Fremen Edition RC - Build thread
Quote:
Originally Posted by atupi View Post
A preview of my work before connecting to toroids.
Nice pic

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Old 20th August 2012, 06:14 PM   #135
atupi is offline atupi  Romania
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Quote:
Originally Posted by bcmbob View Post
I see you went for some top choices. Looks great and anxious to hear about your audition.
Unfortunately i will have some solid impressions after mid september as in the weekend i'm leaving for a two week vacation
But the drilling, putting wires nicely in the case in fun.
Did anyone of you tested MyRef with a low sensitivity speaker ? (under 85db)

PS i having someone for sell two caps ERO Mp1834 10nf ? Unfortunately something strange happened and there is nothing even close to this value available on ebay.

Last edited by atupi; 20th August 2012 at 06:36 PM.
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Old 20th August 2012, 07:40 PM   #136
bcmbob is offline bcmbob  United States
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My_Ref Fremen Edition RC - Build thread
atupi,

I don't know the formal rating but the Sunflower speakers I am using now are much less efficient that others I have owned. My experience is that the combination of the Mundorf AG caps and a larger transformer produce a sufficient SPL for most situations. I have a JC-2 pre at hand for the few occasions it's needed, but I suspect you will be pleasantly surprised with the output of your build, even with just a simple pot.
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Last edited by bcmbob; 20th August 2012 at 07:43 PM.
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Old 20th August 2012, 07:52 PM   #137
atupi is offline atupi  Romania
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I have one 200w toroid/channel and a B1 buffer (wich is no gain) but very soon i have in plan to build a volume control/souce selector based on PGA2311/microcontroller wich i also intend to be powered from a Salas shunt. Did you tested Salas shunt on your JC-2 ?
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Old 20th August 2012, 07:56 PM   #138
bcmbob is offline bcmbob  United States
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My_Ref Fremen Edition RC - Build thread
Not yet. That's about #6 on the must do list. I tried the pre, Lightspeed, Lighter Note and two bare pots. Unfortunately I like them all. It's a personal preference thing I believe.
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Old 20th August 2012, 09:09 PM   #139
ClaveFremen is offline ClaveFremen  Italy
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My_Ref Fremen Edition RC - Build thread
Quote:
Originally Posted by atupi View Post
PS i having someone for sell two caps ERO Mp1834 10nf ? Unfortunately something strange happened and there is nothing even close to this value available on ebay.
You can find them from Umut on eBay but in this moment he's probably on vacation.

If you want PM me, I've some I can sell.
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Old 21st August 2012, 12:10 AM   #140
lehmanhill is offline lehmanhill  United States
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Arrow Sockets

I got a care package from Mouser today. It should have the bits I need to finish the build.

I ordered some of the sockets suggested earlier in the fine tuning thread. I tried to fit the BG STD caps for C9 into the sockets, but the leads are too thick. For you guys that have used these sockets before, what do you do when the leads are too thick? My thought was to file down a short section of lead to fit. Open for ideas. I am hoping to socket and compare C9 and C13,

Jac
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