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I have some failed parts that have been disected. The relay was pulled from a Marantz 140 after it had failed. The contact is welded together. This is due to the fact that the relay contacts are not rated to break DC. An open 9800uf cap from a 700B. The positive post corroded off...

My trusty Hitachi scope V222 scope is on it's last leg. I'm going to need to get a replacement. But first does anyone work on them? some days it works some days it won't. although I like the the analog it's time for a difital what's working good for under $400

I'm on my last batch of the 400 relay boards. The 400 uses a chip for the detection circuit. sooner or later it will be obsolete. Do I start a knew design with the same circuit as the 700 relay board or ride it out and hope the chips last a little longer. If I ride it out I and i run out of...

I get 2-3 emails a week from people looking for a power switch. does anybody have a source for either type that was used.? I am looking at options to use the switch to drive a relay or a triac.

Hello to all. Laatsch55 put me on to this site. I also visit AK and DIY when I have time. Have a primitive web site that I haven't updated in two years. watts abundant Have almost all Phase Linear manuals with common ones on PDF. I send them out for free to anyone who asks. Been kicking...