Gold plated rear input and output banana sockets. Did I need to make this? Earlier this year I purchased a hybrid EF95/6AK5 hybrid tube amp from Amazon. The make and model was Fosi Audio T20. The amp cost about £70 and is a great little amp for driving loudspeakers or listening via headphones, the input is fed through the tubes and then amplified using a TI solid state amp. So obviously it's not a 100% tube amp but a hybrid one. One thing I noticed is that there is a large amount of DC when turning on the amp, this is not good for the speakers. This can be avoided by flipping the toggle to the off position, however this keeps power to the amp on and it gets slightly warm. Now this being something that is cheap and coming from China, I didn't trust it enough to leave it on like this all the time. So this is when I decided to make a circuit using relays to delay the speaker connection and to add in inline power switch, this meant the power is fed to my circuit as well as the ampl...
Just some random circuits that I've built.