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Old 17th June 2006, 09:15 PM   #1271
DIAR is offline DIAR  Finland
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Thanks Peter for checking my work. Voltage rating was one thing but current rating was another. It was a 2 A fuse which means 460 W power with 230 V (10 times tranformer power rating). I didn't wan't to take any chances with high impedance faults...

I'm working on a dirty and cheap BNC connector. I just can't wait until monday
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Old 17th June 2006, 10:30 PM   #1272
DIAR is offline DIAR  Finland
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DAC works

Unfortunately the transformer makes a buzzing sound. I allready tried mains DC filtering but it didn't help.

My BNC connector is not pretty but it works
I used solid core OFC copper wire as center pin and Riken resistor lead as gound pin.
Click the image to open in full size.
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Old 17th June 2006, 10:57 PM   #1273
karma is offline karma  Canada
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nice im still enjoying mine.
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Old 18th June 2006, 01:53 AM   #1274
hayenc is offline hayenc  United States
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Finally had a chance to ABC a Benchmark DAC 1, the internal Dac of a CL-10, and Peter's NOS DAC gold board. While the DAC 1 seems a bit more exact and technical, Peter's board is definitely more musical without losing any detail. The DAC inside the CL-10 is better than I expected, but a touch short of the other two. Peter's DAC is definitely worth the money.

Feeding the X-BOSOZ Preamp from Twisted Pear to a pair of Aleph 2 clones using Brian GT boards and some homemade Focal 3-ways.

Yes, it runs hot with the temp outside being in the 100's, but class A is worth it.

Craig
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Old 18th June 2006, 02:10 AM   #1275
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Quote:
Originally posted by DIAR
Unfortunately the transformer makes a buzzing sound. I allready tried mains DC filtering but it didn't help.
All those transformers buzz, you can control how much by placing the board, or DAC enclosure, on some soft support. The DAC needs approx 2-4 weeks for complete breaking in.

I had Benchmark DAC 1 for a while and preferred NOS. Also, ML360S fell short of the NOS DAC.
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Old 18th June 2006, 03:03 AM   #1276
hayenc is offline hayenc  United States
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Yeah, I could swear I heard resampling errors on the Benchmark, but there was no way to confirm. Just odd clicks and skips. Your NOS has definitely been worth it, even feeding single ended to the X-BOSOZ.
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Old 18th June 2006, 04:32 AM   #1277
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I just pulled my dac out of the enclosure after I started noticing some major changes in the sound, now I understand why people say black gates take a long time to burn in, and Peter, you were certainly right about the improvements. I've noticed the biggest improvement with cymbals. The splashy sound is gone and they have much better defined positioning. It's almost like listening to a really good moving coil setup but with better defined, harder hitting bass.
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Old 18th June 2006, 07:11 AM   #1278
DIAR is offline DIAR  Finland
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Is it normal that those N-type Black Gate get warm. They are not hot but clearly warmer than skin temperature.

The transformer got much more silent after placing it on top of one pile of two Vibrapods. Maybe I'll cut the board into two and place the power supply board on soft feet and the DAC board on stiff feet. I've never had any good experiences with soft feet under digital devices.

After a proper burn in I will experiment with different coupling caps. I seem to have Black Gate, Murdorf Supreme, Jensen aluminum and Auricap in stock.
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Old 18th June 2006, 05:42 PM   #1279
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Quote:
[i]

Unfortunately the transformer makes a buzzing sound. I allready tried mains DC filtering but it didn't help.
[/B]
Yes, it does buzz. Certainly at 242v mains I have.
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Old 18th June 2006, 07:13 PM   #1280
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It may buzz more at higher voltage, however, the PS section can be separated from the DAC section (there is a scoring line to make it easier); the four 20R resistors will connect both boards. In that case, PS can be soft mounted, to reduce buzzing, and DAC section can be mounted in a way to achieve best sonics.

Some of the caps run indeed a bit warmer.
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