mega lord
Centre tapped
I have had only one cdp in my main system for the last 23 years It's a Naim CD3.5 that ibought new and it's still on the original transport. When the upgrade bug hit I added a hicap. Then changed the internal reg to an Avondale TPR4. I have done extensive modifications to the 3.5 over the years and haven't quite finished yet. OPA627 opamps, alwsr for opamps, flea powered clock with dedicated psu, a dedicated psu for each dac power supply pin (three in total), flea regs for dac, a smattering of gyrators, led's replacing Rset on several LM317 regs, pfm mosfet gyrator pre reg for digital supply (everything apart from the dac), capacitors replaced here and there, acoustica mod no.7.
Then I tried bypassing the whole of the anologue stage and just took the audio out from after the dac data sheet first order filter. Well blow me down, I much preferred it and got to do away with a seven pole bessel filter, tens of passive components, two alwsr and two psu's. Still got some recapping to do and a few more lovely led's to put in a few more lm317 circuits . In the dark with the lid off my 3.5 looks like a Christmas tree.
But it's not really a 3.5 anymore. Sounds fabulous to me, I couldn't want for anything else. Got a spare unmodded 3.5 to compare the mods to and a spare VAM transport so hopefully I can keep this thing going for another 23 years. I am obviously very attached to it after owning it so long and spending so many hours working on it. It's a miracle it still works as the motherboard has been in and out more times than my kids have had hot dinners.
Then I tried bypassing the whole of the anologue stage and just took the audio out from after the dac data sheet first order filter. Well blow me down, I much preferred it and got to do away with a seven pole bessel filter, tens of passive components, two alwsr and two psu's. Still got some recapping to do and a few more lovely led's to put in a few more lm317 circuits . In the dark with the lid off my 3.5 looks like a Christmas tree.
But it's not really a 3.5 anymore. Sounds fabulous to me, I couldn't want for anything else. Got a spare unmodded 3.5 to compare the mods to and a spare VAM transport so hopefully I can keep this thing going for another 23 years. I am obviously very attached to it after owning it so long and spending so many hours working on it. It's a miracle it still works as the motherboard has been in and out more times than my kids have had hot dinners.