Search found 16 matches
- Sun Nov 01, 2015 4:39 pm
- Forum: Pro Audio Design
- Topic: modified GFCI
- Replies: 92
- Views: 165535
Re: modified GFCI
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?
- Sun Nov 01, 2015 4:35 pm
- Forum: Pro Audio Design
- Topic: modified GFCI
- Replies: 92
- Views: 165535
Re: modified GFCI
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...
- Sun Nov 01, 2015 11:53 am
- Forum: Pro Audio Design
- Topic: A Simple 10W Direct-Coupled Class-A Power Amplifier
- Replies: 98
- Views: 192114
Re: A Simple 10W Direct-Coupled Class-A Power Amplifier
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...
- Sun Nov 01, 2015 11:50 am
- Forum: Pro Audio Design
- Topic: A Simple 10W Direct-Coupled Class-A Power Amplifier
- Replies: 98
- Views: 192114
Re: A Simple 10W Direct-Coupled Class-A Power Amplifier
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...
- Sun Nov 01, 2015 10:45 am
- Forum: Pro Audio Design
- Topic: A Simple 10W Direct-Coupled Class-A Power Amplifier
- Replies: 98
- Views: 192114
Re: A Simple 10W Direct-Coupled Class-A Power Amplifier
@mediatechnology: I just saw your post re. THAT 5263 - wouldn't this be the perfect thing to use in my case?
- Sun Nov 01, 2015 10:42 am
- Forum: Pro Audio Design
- Topic: A Simple 10W Direct-Coupled Class-A Power Amplifier
- Replies: 98
- Views: 192114
Re: A Simple 10W Direct-Coupled Class-A Power Amplifier
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...
- Sat Oct 31, 2015 1:58 pm
- Forum: Pro Audio Design
- Topic: A Simple 10W Direct-Coupled Class-A Power Amplifier
- Replies: 98
- Views: 192114
Re: A Simple 10W Direct-Coupled Class-A Power Amplifier
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...
- Sat Oct 31, 2015 12:37 pm
- Forum: Pro Audio Design
- Topic: A Simple 10W Direct-Coupled Class-A Power Amplifier
- Replies: 98
- Views: 192114
Re: A Simple 10W Direct-Coupled Class-A Power Amplifier
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...
- Sat Oct 31, 2015 12:15 pm
- Forum: Pro Audio Design
- Topic: A Simple 10W Direct-Coupled Class-A Power Amplifier
- Replies: 98
- Views: 192114
Re: A Simple 10W Direct-Coupled Class-A Power Amplifier
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...
- Sat Oct 31, 2015 11:19 am
- Forum: Pro Audio Design
- Topic: A Simple 10W Direct-Coupled Class-A Power Amplifier
- Replies: 98
- Views: 192114
Re: A Simple 10W Direct-Coupled Class-A Power Amplifier
How about these 23-step Dale attenuators, with 4-poles and populated with high quality resistors, for only ~$50?emrr wrote:Quality switches with lots of steps cost a lot.