Hi all,
I am just putting the finishing touches on a Dual PSU Aleph J. It is my second Firstwatt Clone build, the first being an F6 that went off without incident and has been running great for about 2 years now. I have following the build guide, and the same procedure as the first time, but this time around when I powered up the amp for the first time, LED 2 on one of the amp boards is blinking. The other amp board seems to be functioning normally. I have attached images to show how everything is currently wired up, please excuse the mess as I will be tidying everything up once it's all functioning and biased.
I have inspected all the components to the best of my ability and everything seems to be oriented correctly. I couldn't find any cold solders either. I tested both PSUs prior to assembly, and found a consistent reading of 24.6VDC and -24.6VDC respectively on both PSU boards. My lightbulb tester also behaves normally when the amp boards are disconnected, but the lightbulb dips and then goes full bright when one or both amp boards are connected.
Does anyone have any ides of what it could be? Am I missing something super obvious because I have been looking at the amp for too long today? Any assistance would be greatly appreciated as I am totally stumped.
Thanks so much and feel free to ask any follow up questions. I will keep an eye on the thread and respond asap.
Cheers
I am just putting the finishing touches on a Dual PSU Aleph J. It is my second Firstwatt Clone build, the first being an F6 that went off without incident and has been running great for about 2 years now. I have following the build guide, and the same procedure as the first time, but this time around when I powered up the amp for the first time, LED 2 on one of the amp boards is blinking. The other amp board seems to be functioning normally. I have attached images to show how everything is currently wired up, please excuse the mess as I will be tidying everything up once it's all functioning and biased.
I have inspected all the components to the best of my ability and everything seems to be oriented correctly. I couldn't find any cold solders either. I tested both PSUs prior to assembly, and found a consistent reading of 24.6VDC and -24.6VDC respectively on both PSU boards. My lightbulb tester also behaves normally when the amp boards are disconnected, but the lightbulb dips and then goes full bright when one or both amp boards are connected.
Does anyone have any ides of what it could be? Am I missing something super obvious because I have been looking at the amp for too long today? Any assistance would be greatly appreciated as I am totally stumped.
Thanks so much and feel free to ask any follow up questions. I will keep an eye on the thread and respond asap.
Cheers
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I just started laughing out loud when I read your comment. You were right, for some reason I got a blinking LED from the same pile as the regular LEDs of the same colour at my local shop. Of course it was that stupid. Thank you.
That doesn't explain why my dim bulb tester is on full blast though. Is that normal operation?
That doesn't explain why my dim bulb tester is on full blast though. Is that normal operation?
What’s the wattage on the bulb?
This makes me think of GKTaudio’s recent aleph classic build.
https://www.diyaudio.com/community/...rn-ums-chassis-builders-thread.382316/page-52
This makes me think of GKTaudio’s recent aleph classic build.
https://www.diyaudio.com/community/...rn-ums-chassis-builders-thread.382316/page-52
You will need a 250-300 watt bulb to test as it consumes 200 watts during operation!
I was only powering on with the DBT, planned to remove it once I confirmed that everything was operating ok. The blinking LED however, sent for a loop in the interim 😛