Second channel is acting a bit weird need to investigate further. With bulb tester they are glowing not so bright and the bias I could dial to 300mv and offset to 50mV. But the negative rail led is not switching on. Also observation is that both the rails after powering up dropping to +/-9.9vdc
Strange. LEDs are independent of the circuit and only indicate that PSU is ON and correctly wired to the board.
Maybe negative LED is broken or accidentally reversed.
Try to isolate new channel and power it alone the same way you powered the first one.
Amp probably will not fully bias with both channels and bulb tester.
The makerbeam kit looks like a fun way to build a chassis. Fab yourself a nice backplate to hold the IEC power inlet, speaker terminals, RCA inputs and you’re in business.
I have no idea what is happening with the power wiring to those channel boards, or if the transformer shield wire (purple) is connected to chassis Ground. Hopefully those are sorted by now.
I have no idea what is happening with the power wiring to those channel boards, or if the transformer shield wire (purple) is connected to chassis Ground. Hopefully those are sorted by now.
@TungstenAudio this Antek trafo does not have any transformer shield wiring. The purple wiring is for the primary side switch I added. This is all temporary till I come up with the front/back panels. I am yet to do the psu wiring for the second channel.
Thanks
Thanks
Awesome! Beautiful build.Finally done and it’s playing music 👍
With or without a load?I may need to add a speaker protection module as the offset jumps above 1V when switched off...
Thank you @ItsAllInMyHeadWith or without a load?
Both with and without load and reading Papa original aleph that’s how it behaves and I will replace those thermistors with MJs soft start module
Thank you Anand for now don’t have anything planned for the top but thinking of transparent acrylic panel will look cool with all blue ledsVery nice work! I like the Makerbeam style with wooden fascia! The decorative finishing washers are a nice touch. Are you going to leave it topless or do you have a top panel design in the works as well
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