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Old 17th May 2019, 06:16 PM   #11201
kandimba is offline kandimba  Portugal
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Quote:
Originally Posted by rankot View Post
Did I really wrote this?


What kind of a transformer to use for A40?
It would be good 600VA for each channel with 45VAC 0V 45VAC, it means +62VDC 0V -62VDC. Although with 3 pairs you can go to +70VDC 0V -70VDC maximum.
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Old 18th May 2019, 12:47 PM   #11202
fuego is offline fuego
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Hi
Does anyone have PCB(toner transfer) for this protection?
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Old 18th May 2019, 01:18 PM   #11203
bullittstang is offline bullittstang  United States
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I have a few questions on the FH11/12 deisgn posted in the thread. Plan to use @eaglemaster v1.07 gerber files from post #8557.

1 - Is MJE340/350 interchangeable with KSC3503/KSA1381? I see both on different versions of the board throughout this thread. Datasheet leads me to think they are, because they have similar parameters with the MJE's have higher current and disapation capabilities? Can someone confirm?

2 - Can I also substitute BD139 for a MJE340 - or is that overkill or not suggested?

3 - What are R40 & R41 (22r 1/4w 1%) but not showing on the PCB silkscreen?
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Old Yesterday, 05:41 AM   #11204
still4given is offline still4given  United States
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100W Ultimate Fidelity Amplifier
Quote:
Originally Posted by fuego View Post
Hi
Does anyone have PCB(toner transfer) for this protection?
Try this one. Check for accuracy.
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File Type: pdf APEX Protect .pdf (33.4 KB, 32 views)
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Old Yesterday, 06:10 AM   #11205
fuego is offline fuego
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Originally Posted by still4given View Post
Try this one. Check for accuracy.
thank you
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Old Yesterday, 06:31 AM   #11206
rankot is offline rankot  Serbia
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I was thinking of adding speaker selector to A40. What would be appropriate Ampere rating for relays? Is 8A enough?
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Old Yesterday, 07:54 AM   #11207
rankot is offline rankot  Serbia
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Originally Posted by maxwell007 View Post
i used Alexīs design for my project...
Which PSU did you use? Saw somewhere that Apex PSU60 is recommended.


Did you use DC protect? Which one?
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