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Old 24th August 2010, 08:58 PM   #131
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Originally Posted by RichLund View Post
Have a look here:

items - Get great deals on Capacitors, Eproms ICs items on eBay Stores!

Reason for disapearing NAIS is that production is ceasing , don't know if all voltages or if new models are coming out....you will also notice prices going up on..omron and NEC ( Mouser has these ).
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Old 24th August 2010, 09:21 PM   #132
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Anyone selling matched jfets for the dcb1 buffer?
Got mine from diyaudio member named Blues.

Best,
Anand.
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Old 25th August 2010, 11:27 PM   #133
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It will work OK at 9V too. 9.5-10.5V was just my subjectively preferred region. Don't know if you will hear any difference. Technically yours its correct too. The Leds can settle thermally to some different point each time. But do you know its not part DVM's tolerance as well? What is your DC on the filter caps? So to tell you about the Tx. And what is the DC offset in mV on audio outputs? Any picture?

DC on the second filter cap is 18.1v DC - same on both channels.

How do I measure the output DC offset? Across the 1R resistors? I used jumpers, as I have no 1R resistors. Otherwise, I haven't made any substitutions or amendments to the design or parts.
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Old 25th August 2010, 11:38 PM   #134
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Your DCin-DCout is healthy. No need for a new Tx.

Offset is if you have made it as a full board including the audio part, to measure DCmV across the audio outputs, so we know its adequately safe, since there are no output DC blocking capacitors. Since this is not the regulator only thread its assumed you are making a full buffer pre. Or not? Also did you use your other positive only specialized 30V reg on your Atlantic phono by now?
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Old 26th August 2010, 12:10 AM   #135
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Your DCin-DCout is healthy. No need for a new Tx.

Offset is if you have made it as a full board including the audio part, to measure DCmV across the audio outputs, so we know its adequately safe, since there are no output DC blocking capacitors. Since this is not the regulator only thread its assumed you are making a full buffer pre. Or not? Also did you use your other positive only specialized 30V reg on your Atlantic phono by now?
Hi Salas,

I am still waiting on a few parts for the B1 end of things. Originally I wasn't going to do the delay, but in the end I am, so I am waiting for components.

I did use the other reg with the Atlantic phono, but unfortunately, it's a nice design built on the worst PCBs I've ever used (I think he makes PCBs for a living too??) The traces are incredibly fragile and I was getting only one channel due to ripping a whole trace off when unsoldering a connector. Honestly, it's like chocolate wrapper.

So, in my frustration, I decided to rebuild in point to point, which I've been doing all day today. It's my first p2p and it looks like a freaking mess, but is actually very neat, and fun! Give me a week!

Otherwise, thanks again for being awesome...
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Last edited by LucasAdamson; 26th August 2010 at 12:12 AM.
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Old 26th August 2010, 12:22 AM   #136
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Follow the original routings well on that phono remaking else you end up with noises. Good luck with it.
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Old 26th August 2010, 12:26 AM   #137
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Yeah, I shan't be changing the layout
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Old 27th August 2010, 11:54 AM   #138
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Hmm,

where do the matched set of 2sk170's go on the pcb board?

Thanks,
JG
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Old 27th August 2010, 12:05 PM   #139
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I've got 10x 2sk170BL left from a previous dbc1 build (these should be enough for 1 unmatched board.)

Is it ok to use LSK170A and mix them up with some of the 2sk170BL's for my 2nd unmatched board ?

Thanks,
JG
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Old 27th August 2010, 12:08 PM   #140
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Hmm,
where do the matched set of 2sk170's go on the pcb board?

Thanks,
JG
See Post #4 for pic and explanations
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