For my second adventure in the world of diy electronics I’m building a dcb1 preamp. Buoyed by the eventual success of my first project, a Bigbottle mc phono stage, which after a lot of help from Oliver has seen a great leap forward in my system’s musicality, I thought I’d see if I could get a similar improvement in the next link in the chain.
I’ve assembled two boards and plan to get it working unbalanced first, with provision to try a balanced arrangement in the future when I can afford a 4 pole Khozmo.
It’s taken me some while to build as there were no parts kits left so I’ve had to source components individually. With my rather basics electronics knowledge (A level physics back in 77) and a bewildering choice of similar components available progress has been slow.
So the big switch on today, and…. well, nothing. No lights no signal, nothing! Any. Thoughts on where to start looking would be very welcome. Measuring the input voltage 12.6V to signal ground or 25.4V across terminals. Also there is a very gentle ‘buzz’ to the touch on the casework. No J3 installed - is that right?
Thanks for any help.