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Old 25th November 2012, 10:40 AM   #511
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OK my bad

populated R25,r26 and works now.
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Old 8th January 2013, 08:07 PM   #512
RollE2k is offline RollE2k  Sweden
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By the way, how sensitive is the legato for Input voltage difference between the positive and negative voltage? I'm going for resistor to set voltage, not pots and wonder if it would be +14.90/-15.00 would that just be trimmed out at the output?

And also as said, if i wire the outputs to my linestage without any ground connection, would that be any problem (they are in same case, and i don't want to mix ground from both supplies, but they will all be connected to chassis through a resistor or rectifier bridge)?
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Old 8th January 2013, 09:39 PM   #513
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Not very sensitive at all. anything within a volt on either side should be fine.
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Old 25th January 2013, 06:17 AM   #514
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Hello ,

I measure my Legato with all out put Balance & SE is 0.1 mV DC , but When I reset power supply then all value is changed . What is wrong ?

Van Duy
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Old 25th January 2013, 12:06 PM   #515
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It could be your PS settling? Its hard to say. if you like open up a thread on the support forum with pictures.
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Old 26th January 2013, 12:15 PM   #516
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Default Toslink problem with Buffalo

2013-01-22 21.37.15.jpg


Sorry for posting it here. I could not find the Buffalo tread. On your support side I can not post pictures like this. The toslink make the lock led flashing. I use the 270 series resistor and 100 ohm parrallel. Will it make the difference with 75 ohm ? Or do I have to change anything else ?

Last edited by Erlend Sæterdal; 26th January 2013 at 12:24 PM.
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Old 26th January 2013, 01:47 PM   #517
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Quote:
Originally Posted by Erlend Sæterdal View Post
Attachment 326457


Sorry for posting it here. I could not find the Buffalo tread. On your support side I can not post pictures like this. The toslink make the lock led flashing. I use the 270 series resistor and 100 ohm parrallel. Will it make the difference with 75 ohm ? Or do I have to change anything else ?
Reduce the size of the picture and post it on the support forum please.

This is definitely not the right thread.

Still one hint, try tying -IN to GND for that input.

Do not respond in this thread or I will start deleting posts.

Thanks!

Russ
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Old 26th January 2013, 04:12 PM   #518
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Quote:
Originally Posted by Russ White View Post
It could be your PS settling? Its hard to say. if you like open up a thread on the support forum with pictures.
Thanks for your reply ,

I think it is time warm up of Mosfet and Transistor ?.

I measured all out put is 0V with 200mV DC meter, then I off/on power,the output about 8mV and measured -1.6mV in 5 minute later .

It is normal ? .Can I connect direct to tube pre-amplifier ? .

Van Duy
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Last edited by nvduybom; 26th January 2013 at 04:17 PM.
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Old 26th January 2013, 04:22 PM   #519
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It really depends on the amp.

BTW when measured like that the inputs are floating. Which will effect things.

This is why you need to measure again once the DAC is conneted.

If the few mv of warm-up offset is too much your amp then use AC coupling caps.

One other note - the main pair of NPN (QN5 QN6 etc) can be thermally coupled. This should significantly reduce any such drift.

I do this by gluing them together or using heat-shrink tubing etc.

Cheers!
Russ
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Old 26th January 2013, 04:31 PM   #520
avr300 is offline avr300  Denmark
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Quote:
Originally Posted by Russ White View Post
One other note - the main pair of NPN (QN5 QN6 etc) can be thermally coupled. This should significantly reduce any such drift.
One picture = 1000' of words.

This if from an earlier Legato but the picture is principal.

Sorry for interrupting the threat.
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