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retromit · 13th Oct 2021, 9:40 pm

Hi.

Okay, I took a few measurements over different periods of time and they all seemed to be around the same value. The last two sets I have are as follows:

CR1 = 9.04/3v
CR2 = 9.04/3v
JP8 pin 4 = 9.04v

CR1 = 9.08v
CR2 = 9.06v
JP8 pin 4 = 9.07v

These readings were taken when the PET was first switched on, then after running for a few minutes. I did check CR1 a few times, and if this changed, then I checked pin 4 - they were about in sync value wise from what I could see.

13th Oct 2021, 9:40 pm	#84
retromit Pentode Join Date: Oct 2021 Location: Falkirk, Scotland, UK Posts: 140	Re: Commodore PET 2001 voltage regulators Hi. Okay, I took a few measurements over different periods of time and they all seemed to be around the same value. The last two sets I have are as follows: CR1 = 9.04/3v CR2 = 9.04/3v JP8 pin 4 = 9.04v CR1 = 9.08v CR2 = 9.06v JP8 pin 4 = 9.07v These readings were taken when the PET was first switched on, then after running for a few minutes. I did check CR1 a few times, and if this changed, then I checked pin 4 - they were about in sync value wise from what I could see.