Hahahaha
I have people on my ignore list. I can't even remember why.
The good old ignore list saves the day.
Hahahaha
I have people on my ignore list. I can't even remember why.
The good old ignore list saves the day.
Hahahaha
I checked rectifier diodes and CL60 no problem.
I set right channel bias 0.25V,bulb turn on dark and LED also dark.
left channel still 0V at R2.
I set right channel bias 0.25V,bulb turn on dark and LED also dark.
left channel still 0V at R2.
Please understand.
A light bulb tester is not used to bias your amp.
It is used to find faults.
Set Vgs to 2.5V
A light bulb tester is not used to bias your amp.
It is used to find faults.
Set Vgs to 2.5V
1) Remove Bulb Tester
2) Put in regular power cord
3) Bias to 0.25V across source resistors
4) Check dc offset
Now increase Vgs to 3 V and check everything.
Then increase Vgs to 3.5 and check everything
Turn each pot a little bit at a time while watching your multimeters
You should have one measuring Voltage across R1 or R2, and the other multimeter measuring dc offset
Let it warm up and check everything is still good
If everything is still good we will proceed to next stage.
2) Put in regular power cord
3) Bias to 0.25V across source resistors
4) Check dc offset
Now increase Vgs to 3 V and check everything.
Then increase Vgs to 3.5 and check everything
Turn each pot a little bit at a time while watching your multimeters
You should have one measuring Voltage across R1 or R2, and the other multimeter measuring dc offset
Let it warm up and check everything is still good
If everything is still good we will proceed to next stage.
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Ok
Now bias to 0.65V
Let it sit for 30 minutes, then remeasure bias and dc offset, make small adjustments if required.
Then measure heatsink temperatures
Edit: I am going to sleep now: 2:30 am
Now bias to 0.65V
Let it sit for 30 minutes, then remeasure bias and dc offset, make small adjustments if required.
Then measure heatsink temperatures
Edit: I am going to sleep now: 2:30 am
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well, case positive that someone's OCD is paid of , in the end
( I can call him names, when he's sleeping; when he comes back, tell him that I'm sleeping
)
( I can call him names, when he's sleeping; when he comes back, tell him that I'm sleeping
)
2 picoDumbs
I connected the WM directly to the power line, no Isolation trans. Humming still! Arggggg! I don't think it's a grounding issue...everything is lifted or floated. But I am seriously wondering if the input decoupling caps are not shielded enough. When i touch them the hum gets louder.
you mean CDO? 😀
In anycase, I need some of that CDO now!
I connected the WM directly to the power line, no Isolation trans. Humming still! Arggggg! I don't think it's a grounding issue...everything is lifted or floated. But I am seriously wondering if the input decoupling caps are not shielded enough. When i touch them the hum gets louder.
you mean CDO? 😀
In anycase, I need some of that CDO now!
