New Member with Carver PM-1.5 I would like to fix

[Keyman69 3]

Hello everyone, 

 

I am a retired electronics design engineer who designed mostly digital and embedded microprocessor designs with a smattering of some analog circuits along the way. 

The Carver PM-1.5 is quite the challenge.   I bought it many years ago and it worked well until the large power supply capacitors failed.  I replaced them and it worked for quite a while longer and failed some years ago. I removed the dual power supply caps and found they had failed which is at least part of the problem.  Now I am looking at sourcing replacements for them ( I have seen the EBAY replacement board with 4 caps),  but I will probably make my own. 

 

Then I will see what else is wrong with it if I am able to .  I appreciate any suggestions along the way.  Especially how I can isolate my digital oscilloscope so I can use it to safely view wave-forms should I get that far. 

I have a Variac specially for this,  but have never had the issue of needing to also  isolate a 'scope to make measurements.  Ways to do that would be greatly appreciated and thanks ahead of time if any one out there has the way. 

Edited 7 hours ago by Keyman69

[Half Life 1,376]

Welcome from Virginia!  Enjoy your stay!

[Jeff Stone 337]

Welcome to TCS!

[3M_Audio 2,354]

Welcome! When you talk about isolating your scope are you thinking about a high voltage differential probe? I have the Micsig DP10007 and it's worked well for me when I need to measure a voltage difference at two points not at ground potential.

 

[Receiver2000 4,844]

Welcome!!!