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Old 13th June 2010, 11:37 PM   #161
Reality first!
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Quote:
Originally Posted by westers151 View Post
It's easy enough to shape the legs so that the resistors sit horizontally, albeit just off the board.
Something like this:
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Old 14th June 2010, 11:31 AM   #162
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Yep, just like that
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Old 14th June 2010, 12:39 PM   #163
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I started yesterday putting together one of the boards. I have had no problems with most of the common issues:

-I took a different approach for the resistors. I preferred to place the vertical rather than horizontal with the legs bent, so there is almost no risk of touching and adjacent component. I can see two resistor's legs too close from each other in this last Dario picture.

-I have drilled a new hole for R3 heatsink and now it doesn't touch any component. No need to trim or bend any fin. I am soldering the opamp directly to the board, so there are still around 3-4mm of clearance on top of it.

-I have soldered C21 under the board, and it left enough free space for C9 (Blackgate) to fit well. It will sit on the board and on C21 solder pads, so it doesn't vibrate of hangs on its legs. It is firmly seated.

-I placed C4 using C17 and C18 pads (not actually used), so it fits better AND doesn't touch R3 heatsink. This last one is the most relevant point, be careful with the heatsink.

-As an advice, remember to solder component's legs on both side of the board. It will provide a bigger contact surface for better electrical performance and a higher reliable mechanical performance.

-I first installed resistors, capacitors, relay and spades (all components not ESD susceptible, most of them). I will clean it thoroughly with isopropilic alcohol and a toothbrush. This will save me any troubles of frying a semiconductor because of brushing it with a plastic brush. I will solder then the LM318, LM3886, the transistors and the diodes, and leave the board with that little bit of flux. It is the best balance between having a clean board and having no risk.

So far, all audiophile components bringing any drawback have been succesfully solved.

Regards,
Regi
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Old 14th June 2010, 01:07 PM   #164
AndrewT is offline AndrewT  Scotland
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could you post a pic of the heatsink installation?
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Old 14th June 2010, 01:15 PM   #165
Reality first!
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Quote:
Originally Posted by regiregi22 View Post
I took a different approach for the resistors. I preferred to place the vertical rather than horizontal with the legs bent, so there is almost no risk of touching and adjacent component. I can see two resistor's legs too close from each other in this last Dario picture.
Regi, if your approach makes you feel safer, good, but my MyRef is working since the last Group Buy... no problems at all.

Obviously with the 'orizontal bent' approach some care is needed.
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Old 14th June 2010, 01:21 PM   #166
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could you post a pic of the heatsink installation?
As soon as I get home
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Old 14th June 2010, 01:23 PM   #167
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Quote:
Originally Posted by ClaveFremen View Post
Regi, if your approach makes you feel safer, good, but my MyRef is working since the last Group Buy... no problems at all.

Obviously with the 'orizontal bent' approach some care is needed.
Of course, your choice is good and will work alright. Just a matter of personal choice
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Old 14th June 2010, 03:30 PM   #168
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Regi and other builders,

Be careful with Blackgate C9 if C21 is under the board. I found this arrangement fits the best, but be certain that the C9 leads are not touching C21 pads. I put a thin piece of foam under the Blackgate, which insulates it from C21 pads and any other accidental contact, and provides some reduction of vibration as well.

Perform a thorough visual inspection of all leads, especially those bent resistors, before applying power.

Peace,
Tom E
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Old 14th June 2010, 05:43 PM   #169
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Thank You Regi for the good starting point for the novice
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Old 14th June 2010, 09:38 PM   #170
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Originally Posted by madisonears View Post
Regi and other builders,

Be careful with Blackgate C9 if C21 is under the board. I found this arrangement fits the best, but be certain that the C9 leads are not touching C21 pads. I put a thin piece of foam under the Blackgate, which insulates it from C21 pads and any other accidental contact, and provides some reduction of vibration as well.

Perform a thorough visual inspection of all leads, especially those bent resistors, before applying power.

Peace,
Tom E
Thank you for the advice. I can clearly see that both pads stay away near 10mm away from each other, so I am safe
I was worried about it staying hanging, but when I bended the legs and soldered it to the board, it was kept quite firm, you can't move it. But it is easier and more practical to use somethink like your pads.
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