Where were the Sanken's sourced from for future ref.. just in case..
Digikey.
Where were the Sanken's sourced from for future ref.. just in case..
I know it's not new. It just seems to be explained and done in such a way to be practical for most people. Maybe someone that wouldn't consider this before, will now.This has been known about for some time, it definitely isn't new. But I think it is the first time the creation of the modified transistors has been described in this level of detail.
I know it's not new. It just seems to be explained and done in such a way to be practical for most people. Maybe someone that wouldn't consider this before, will now.
Will also be interesting to see how those outputs perform and if you will need to add any small value caps to the feedback circuit to prevent overshoot during square wave testing later on.
I know it's not new. It just seems to be explained and done in such a way to be practical for most people. Maybe someone that wouldn't consider this before, will now.
Yes, and the approach reaches other models/brands, too, including KA-907's 2SA165 / 2SC2489 (50MHz), L-07MII's 2SC2337/2SA1007 (70MHz), etc...This should work for the X1 as well. I guess this solves the output transistor problem for those impossible-to-find high-speed outputs! Let's spread the word!!!!
Great thanksDigikey.
Well, bench testing complete, listening to it now for the first time, being driven by my C-2102 pre-amp (- fully reconditioned) - it's beautiful, plenty of bass with a very nicely presented image. Female vocals are very nice, and rock music makes you feel like turning it up!
Just a soak test and final set up to do - then cosmetics such as speaker terminals, remove and clean the front panel etc.
Can you comment on sound and build of BA-F1 vs AU-X1
Yes, the BA-F1 is similar to the AU-X1 - but less refined although it does extract a fair amount of detail. The rock music presentation of the BA-F1 reminds me a bit of the AU-717. I should think the BA-F1 would sound significantly different depending on what pre-amp it is paired with.
But I may just be telling you what my C-2102 sounds like paired with the BA-F1.
I could do with trying some more rock music, and some classical.
That is excellent ! As comparison the pre-drivers I swapped to in the 999, ksa1220/ksc2690 are 26/19 pf ! - they are rated at +1A and that's the problem - high Ic = capacitance. I am afraid to use the ksa1381/ksc3503 since they are only rated at 100mA with originals at 500/200.
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John - Your restorations are always so well considered and thoughtful, striking a balance of staying true the original design while only carefully and deliberately up-rating specs when called for