Starting to think Peter Daniels PSU board with LM317/LM337 would work well with the BA-3 as a standalone preamp. Simple, low part count like BA-3.
(1) Why are the ends of the heat sinks cut off?
(B) Nice to see that you've put the prices for some of the components on there...
🙂
THe heatsinks were cut off by the defined dimensions of the board. Didnt go to thetrouble of labeling the pieces, as it is a proto. ThE next version will have options for cascodes and multiple feedback points.
THe heatsinks were cut off by the defined dimensions of the board. Didnt go to thetrouble of labeling the pieces, as it is a proto. ThE next version will have options for cascodes and multiple feedback points.
That's one of those questions that is immediately obvious to those who already know it, and completely mysterious to those who don't...
I fall in the later camp, sadly.
I fall in the later camp, sadly.
IT has a lot to do with the topology. If using standard BA3, I would use a 25K pot, like in the B1. If you are using cascoded topology, you can get away with a 50K pot. It relates to Miller effect and its interaction with the value of the pot. JFet Frontiers Pt1 and 2 by Erno Borberly explains it very well.
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