Aleph J for Universal Mounting Spec - Page 19 - diyAudio
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Old 11th February 2013, 11:49 AM   #181
henryve is offline henryve  South Africa
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OK, I just need some advice with the LEDs. There are thousands to select from, so some help just to nudge me in some direction would help. Obviously Blue will be favoured by most.

Not too worry, I will use http://za.mouser.com/Search/ProductD...66CBFNCS0W0352

Last edited by henryve; 11th February 2013 at 12:19 PM.
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Old 11th February 2013, 01:07 PM   #182
6L6 is offline 6L6  United States
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Actually, as the LED are there to show proper power to the amp PCB, you will want 2 different colors. Red and Green are the most logical, to show V+ and V-

But some people will want to use at least one of those LED as a 'power on' indicator... So whatever you might find in the way of Pass blue is cool as well...
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Old 11th February 2013, 01:28 PM   #183
henryve is offline henryve  South Africa
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OK, I need somebody else to check my BOM and give feedback. I would like to change it's status from Draft to Revision A.
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File Type: pdf BOM-Aleph-J-UMS.pdf (320.7 KB, 36 views)
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Old 11th February 2013, 01:34 PM   #184
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After my recent experience with DCB1, I would be really suspicious of clear and super bright leds. Especially blue and white ones.
The cheapest 3mm red ones should be awesome for the job
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Old 13th February 2013, 08:30 AM   #185
henryve is offline henryve  South Africa
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As nobody else besides dimkasta seems interested in giving any feedback on the BOM I am going to make the BOM Revision A. I will allow another 24 hours for feedback.
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Old 13th February 2013, 09:54 AM   #186
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Looks good Henry. I would argue gate stoppers are not an option. If interested, I can provide matched fets for GB.
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Old 13th February 2013, 09:59 AM   #187
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Agree. Looks great.
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Old 13th February 2013, 10:31 AM   #188
henryve is offline henryve  South Africa
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What would be a good value for gate stoppers? 220R?

PS: Maybe Choky can answer this one since he made the suggestion.

Last edited by henryve; 13th February 2013 at 10:36 AM.
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Old 13th February 2013, 10:34 AM   #189
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Thats what i have seen on most IRF amps. You could maybe go as low as 100, but i see no benefit.
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Old 13th February 2013, 10:44 AM   #190
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I don't think gate stopper needed (if we are talking about J1/J2, JFet gate stopper).
R1 can act like stopper?

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