Re: Another DIY SS Amplifier with NVA Boards
Posted: Sun Mar 25, 2018 10:09 pm
Yes
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It all worked fine for about 5 minutes after the transformer transplant, then poof! on the left channel.
The output transistors were reasonably easy to get out, because of the bolt up case. I had remove one side of the case, snip off the device pins, remove the boards, then shock the devices off the base with a hammer and chisel. This sounds extreme but it wasn't really - a single sharp tap did the trick.How easy was it to remove the glued down output transistors ?
A bit of artistic licence there. It wasn't really a Sgt Major type of bollocking, more of a constructive ticking off, with advice, from the CO.Oh, and how big was the bollocking you acquired ?
+1 Absolutely everyhing you've said there Stu particularly re the bit about adding more complexity not necessarily being a good idea.karatestu wrote: ↑Mon Apr 02, 2018 12:32 pm Thanks Steve. I like the bit about inverse relationship between complexity and access to the music. My interest and experiments are increasingly heading in that direction. I look forward to your observations since you have simplified the psu.
It has been difficult to forget all the things that i thought i had learnt. We used to take the piss out of the Naim agricultural regulator but it was simple - lifted straight from the LM317 data sheet. Spent years playing with psu's and "improving" the regulators. This seemed to bring benefits with Naim and Avondale gear but not necessarily musical benefit as i wasn't tuned in to that back then. NVA circuits are obviously different and need to be treated as such. Plus i now know where i was going wrong adding more and more complexity.