I was not thinking about the 2sk369v, but the choice to choose 2sk170 around 7mA and not as high as possible.
D.
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I've always rallied builders to do that. But I am cheap.
This is how I power my Phono pre.
I am cheap too, but the question is whether or not it offers any signficant improvement. I wouldn't think there is much to be gained, but looking for more experienced opinions. I am going to try his dual mono as well as a truly balanced version.
In my build, I used 2 separate buffer boards, hotrodded, for the main left and right balanced outputs. I also used another buffer board, not so hotrodded (did not have the thermal budget" inside the case) with the buffers driving L&R unbalanced outputs for a headphone amp, and powering another 4 buffers on perf-board for parallel balanced output to drive subwoofers.
Comparing the 2 sets of balanced outputs driving some full-range monitors, there is a fair difference in sound between the heavily hotrodded main outputs with dedicated PSU per channel, and the other outs which share a not-so-hotrodded PSU. The main outs are more detailed, smoother, more dynamic and with a bigger "space". The parallel sub outs do not sound bad (fine for a subwoofer), but I would say in comparison the the main outs the sound is more constricted, a little less smooth and with a slight loss of detail. This was a single blind test with 4 listeners. Not exactly scientific, but I was surprised at the level of difference. Take it for what it's worth, possibly not much, but it's what happened with my build.
Cheers,
bk
Thank you for the comment. I wish the standalone PSU was also "hotrodded", so that we could eliminate that as a possible contribution to the different sound. It makes sense that individual PSU's for the dual mono might sound better.
You're very welcome, as I said it's not exactly what you wanted, however I'm not surprised that the hotrodded PSUs sound significantly better (ie I think that makes sense, probably lower output impedance), and I also think that separate PSUs will offer slightly less crosstalk - this might be audible, I doubt it but I've been wrong before... And whatever tests I do are dependent on the rest of the system and my (or the listeners) ears, it may well not translate to your system, situation and ears... For the record, the hotrodded PSUs are running at about 40-45 degrees C on the heat sinks and the not-so-hotrodded is running at about 30 degrees C - it's not *so* different.
Hi guys!
Is in your opinion a 12-0-12v 100va CT transformer suitable for the 600ma bias?
Better finding a bigger one?
Thank you very much!
Is in your opinion a 12-0-12v 100va CT transformer suitable for the 600ma bias?
Better finding a bigger one?
Thank you very much!
Hi Andrew!
If I understood well, Salas found 10v-10,5v rails as the better "region" for DCB1, am I right?
I was asking because, even if 12v-0-12v transformer seems right for "normal" DCB1, I was reading that 15v could be better...
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If you use a 230:12Vac transformer and mains is @ 230-6% then the fully loaded output voltage is ~11.28Vac +-transformer tolerance.
The output from the rectifier is ~14.5Vdc.
For a recommended Vdrop across the CCS of 7Vdc then the maximum output voltage of the regulator is ~ 7.5Vdc.
Well short of the 10Vdc to 10.5Vdc target.
Do the sums !
The output from the rectifier is ~14.5Vdc.
For a recommended Vdrop across the CCS of 7Vdc then the maximum output voltage of the regulator is ~ 7.5Vdc.
Well short of the 10Vdc to 10.5Vdc target.
Do the sums !
Does anybody have a prt nnumber for LED's from Mouser. I cant seem to find the damn things using their online search tool.
Mouser !
I tried to order some goods from them.
Cost $4, great value.
Post $12.
Canceled the order.
I tried to order some goods from them.
Cost $4, great value.
Post $12.
Canceled the order.
Depends on how much you buy (they do ship by weight) and where you are located. I bought $100 worth of items, but everything weighed less than 1 lb, so my shipping in the U.S. was $4.95. If you are in the U.S. and the items weigh less than 3 lbs then use USPS. Or else you are stuck with Fedex/UPS. If you are overseas, you will pay, pay, pay.
YMMV, FWIW,
Anand.
Free shipping in Europe for order over 65€ or 50£ (easy to reach if you combine the order with a couple of friend). You just pay VAT when you receive the parcel at home.
Should you need something...... 😉
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woodturner-fran did the most extensive listening test with different values, and found .22uf to be a good spot, and a lot of us followed that example.
If I had to choose for you, the MKP1837 would be my choice, measure well and well regarded.