On Tue, Oct 29, 2024 at 03:25 PM, @jp8 wrote:
I'd first make sure the CMOS oscillator gets powered. Connect the DMM ground lead to the NT1-A chassis. Press the red probe on the gold-plated test pad next to the IC, marked with a red circle in attached picture and turn phantom power on. With the body open, it will pick up a lot of hum. Do not output the signal of the preamp to an amp and speakers. You should measure approximately 15V. Then measure on the other test pad, marked with a green circle. Here, you should measure something like 60 to 73V, depending on your DMM input impedance.
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Hi Jan! Here you will find the measurements.
Red circle test pad: 15.2
Green circle test pad: 68.7
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@Arjay1949
Thanks also for your explanations!
