My_Ref Fremen Edition - Beta build/Fine tuning - Page 12

bcmbob · 27th March 2012, 11:20 AM

O.K. I have actually wondered if/when you got some time to sleep.

ClaveFremen · 27th March 2012, 12:32 PM

I've checked Mouser's shared BOM and it includes caps (Nichicon FW) for C102/C202 but in this moment they're not available, maybe this is the reason you didn't received them, Bob.

BTW It could be better this way, they're not so good for those positions, final BOM will have different caps (probably FG: 647-UFG1H101MPM)

Cerafines are very good caps for those position.

bcmbob · 27th March 2012, 01:26 PM

Thanks, I found some 100uf / 50V from the MyRef 1.3/1.2 builds. I'll add something better to my next order.

Here are the pics of all installed other than Heat Sinks, Relay. LM3886 (I think)

Please review.

FE-1

bcmbob · 27th March 2012, 01:27 PM

FE-2

ClaveFremen · 27th March 2012, 01:35 PM

At a first glance it seems fine...

I can't read LM337, BC639 and BC640 markings, check them against silk screen (just to be sure ...

).

bcmbob · 27th March 2012, 02:06 PM

Same on both boards.

ClaveFremen · 27th March 2012, 04:40 PM

Seems fine

bcmbob · 27th March 2012, 04:47 PM

Just found a mistake

I mounted and trimmed R3 before attaching the heat sink so now the leads are too short. I remember one must do this with the LM3886 chips but I totally forgot it on R3. Luckily I have some double sided CPU heat transfer tape I can use till I get some new parts

bcmbob · 27th March 2012, 06:52 PM

Sockets filled, Relay in and LM3886 installed.

If you see something - say something,

bcmbob · 27th March 2012, 07:39 PM

Quote:

Originally Posted by ClaveFremen

Just one note on transformer wiring, since I didn't wrote anything about it.

The transformer should have double 25V (24V also fine) secondaries, let's say:

Secondary 1: green/yellow
Secondary 2: violet/white

They should be branched that way:

Green to AC1, Yellow to NAC1
Violet to AC2, White to NAC2

Please confirm.

27th March 2012, 11:20 AM	#111
bcmbob diyAudio Member Join Date: Dec 2009 Location: Bay City, Michigan	O.K. I have actually wondered if/when you got some time to sleep. __________________ Bob M. "Arrange Whatever Pieces Come Your Way."

27th March 2012, 12:32 PM	#112
ClaveFremen Reality first! diyAudio Member Join Date: May 2005 Location: Milan, Italy	I've checked Mouser's shared BOM and it includes caps (Nichicon FW) for C102/C202 but in this moment they're not available, maybe this is the reason you didn't received them, Bob. BTW It could be better this way, they're not so good for those positions, final BOM will have different caps (probably FG: 647-UFG1H101MPM) Cerafines are very good caps for those position. __________________ Dario ClaveFremen "Bailando Salsa en el Sietch" - My_Ref Fremen Edition GB Second Run

27th March 2012, 01:35 PM	#115
ClaveFremen Reality first! diyAudio Member Join Date: May 2005 Location: Milan, Italy	At a first glance it seems fine... I can't read LM337, BC639 and BC640 markings, check them against silk screen (just to be sure ... ). __________________ Dario ClaveFremen "Bailando Salsa en el Sietch" - My_Ref Fremen Edition GB Second Run

27th March 2012, 04:40 PM	#117
ClaveFremen Reality first! diyAudio Member Join Date: May 2005 Location: Milan, Italy	Seems fine __________________ Dario ClaveFremen "Bailando Salsa en el Sietch" - My_Ref Fremen Edition GB Second Run

27th March 2012, 04:47 PM	#118
bcmbob diyAudio Member Join Date: Dec 2009 Location: Bay City, Michigan	Just found a mistake I mounted and trimmed R3 before attaching the heat sink so now the leads are too short. I remember one must do this with the LM3886 chips but I totally forgot it on R3. Luckily I have some double sided CPU heat transfer tape I can use till I get some new parts __________________ Bob M. "Arrange Whatever Pieces Come Your Way."


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