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50w Single-Ended BAF2015 Schade Enabled
50w Single-Ended BAF2015 Schade Enabled
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Old 12th November 2019, 04:15 AM   #931
Ben Mah is offline Ben Mah  Canada
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Quote:
Originally Posted by Itsmee View Post
Hopefully it's right this time.
Bad news!

Something that I didn't catch last time - pin 5, not pin 6, of the 4N35 connects to the 1000uF cap positive terminal.

In your switch-around of Drain and Source, some of the connections were messed up. Your 4N35 pins 2 and 4 and 1000uF cap negative is now connected to the speaker out (O/P). It should be connected to "A" on your board.

Maybe fourth time lucky.
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Old 12th November 2019, 04:40 AM   #932
Ben Mah is offline Ben Mah  Canada
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Originally Posted by dantwomey View Post
I owe Ben a cold beverage. He caught a flaw on my schematic!
BAF 2020? I've been hanging out with your fellow Torontonian Dennis Hui here in SF.
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Old 12th November 2019, 08:05 AM   #933
Itsmee is offline Itsmee  England
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50w Single-Ended BAF2015 Schade Enabled
Thanks Ben, last go.
Simple circuit, can't believe I keep cocking it up!
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Old 13th November 2019, 03:12 PM   #934
vdi_nenna is offline vdi_nenna  United States
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50w Single-Ended BAF2015 Schade Enabled
I thought it was simple too until I tried to P2P this circuit.
Made me humble. I'm 0 for 2 in my last two amp builds.
I need a win!
__________________
I build, therefore I am.
Do not create problems where there are none.
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Old 13th November 2019, 03:55 PM   #935
analog_sa is online now analog_sa  Europe
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50w Single-Ended BAF2015 Schade Enabled
Quote:
Originally Posted by Itsmee View Post
Simple circuit, can't believe I keep cocking it up!

Being a bit stupid i always follow the workflow: schematic > netlist > pcb. Even for something simple. In the long run it is better for documentation and maintenance. It also excludes any possibility for the pcb not to match the schematic.
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Old 13th November 2019, 07:03 PM   #936
Itsmee is offline Itsmee  England
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50w Single-Ended BAF2015 Schade Enabled
Quote:
Originally Posted by analog_sa View Post
...i always follow the workflow: schematic > netlist > pcb...
That's the correct way; working free hand isn't usually a problem as I would normally print the schematic and component pin-outs as I layout; then check off the circuit layout against the schematic using highlight pen as I go.
At the moment, I don't have a working printer
I should buy one, better still, learn to do it properly
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Old 13th November 2019, 09:17 PM   #937
dantwomey is offline dantwomey  Canada
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50w Single-Ended BAF2015 Schade Enabled
If you're using a SOT-227 device I have some spare PCBs I'm willing to share for a modest fee.

Regards,
Dan
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Old 13th November 2019, 11:38 PM   #938
Itsmee is offline Itsmee  England
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50w Single-Ended BAF2015 Schade Enabled
I ordered the last version, the boards should be here in a couple of days, if they go bang, i'll give you a shout, thank you for the offer.
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