Pro Audio Design Forum

I should add that your device sounds like a great idea, and I'm sure you'll be able to find buyers should you decide to have them manufactured. What's your target unit cost?

if there is no ground, (like most of my house) only the blue lights up Ah, I see, fair enough! Though with the risk of being annoying, shouldn't missing ground be regarded as a fail/warn condition? At least here in Europe it is a legal requirement that all outlets provide an earth connection - thou...

Come to think of it, won't the configuration mean that even without the blue LED there will always be two other LEDs lit? Doesn't that on its own serve as "power present" indication? "Less is more" and all that...

I do use red to warn that ground is hot. Yellow if line and neutral are reversed, generally not dangerous, but wrong, and green for the correct wiring Line hot, with another green LED for ground present. The blue LED is just for power present, useful to know also when troubleshooting wiring. Ah, he...

@mediatechnology: I just saw your post re. THAT 5263 - wouldn't this be the perfect thing to use in my case?

Yeah, they can be used for heating stuff as well as cooling it - and you can even use them as electricity generators by heating one side (and cooling the other). Quite a versatile technology, but (as you've noticed) not all that efficient. Your ground fault protection/detection thingy looks like a g...

That stuff is just silly... But the audio business teaches us build it and somebody will probably buy it if it's exotic looking enough. :D I totally agree, on both points! :) Again, I regret using the word "bling" in my initial posts - it really doesn't give you the correct impression. Th...

I've looked into this and water never ever makes sense inside an audio power amp. It adds a level of complexity and potential failure modes that are unnecessary and very undesirable in that context. Tell that to the people who put water cooling systems inside their computer cases, which often conta...

Those switches are most definitely not Dale brand, they are cheap Uraltone Russian switches Yeah, I realised this after posting, and I do understand that there are quality issues with these switches. I'm interested in the option of a having a variable gain input stage rather than a variable resista...

emrr wrote:Quality switches with lots of steps cost a lot.

How about these 23-step Dale attenuators, with 4-poles and populated with high quality resistors, for only ~$50?