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Increasing voltage output on the LEgato
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biggsd  
#1 Posted : Tuesday, October 29, 2013 9:22:14 AM(UTC)
biggsd

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Hi there

In order to drive the rest of my equipment properly and as sometimes my input SPDIF signal isnt quite loud enough - i Need to get the voltage output of my legato a bit higher. I have another gain stage, but even when thats maxed out I still cant quite get enough gain to drive my amps to where they need to be SO..

In the instructions it says I can get it from 1.5vrms to 2vrms, by replacing the R1-R4 with 187R resistors.

This should be enough, but I cant seem to find 187Rs with the right power handling of say .25w in small quantities. I can find some 187s but they are not the power handling needed for this application.

Can you suggest where I can find these parts in singles? I just need 10 of them...

Thanks!

-David
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Russ White  
#2 Posted : Tuesday, October 29, 2013 12:30:25 PM(UTC)
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Mouser or digikey should carry those.

http://au.mouser.com/Pro...52bQWVpuiA12GSjkkTGyo%3d

1/4W should work fine, but 1/2W would be better.

While not exactly 187R this part would work great:

http://www.digikey.com/p...R500/PPC191XCT-ND/594731

Cheers!
Russ
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biggsd  
#3 Posted : Wednesday, October 30, 2013 3:50:48 AM(UTC)
biggsd

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Great, thanks heaps for that, will go for the one I can buy in singles :-)

Cheers for your help!
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Vingborg  
#4 Posted : Tuesday, August 19, 2014 11:22:00 AM(UTC)
Vingborg

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Hello Angel

I've just got the Legato up and running, but I also need to increase output voltage because for comparison with my cd player the 1,5 volt is a bit too low!

I need about 1,8 volt output.

If 150 ohm gives an output of 1,5 volt, and 187 ohm gives an output of 2 volt - Would I then have to replace R1-R4 with 170 ohm 0,5 watt for 1,8 volt output ?

And is it necessary to replace other than these four resistors for reach 1,8 volt output?

I look forward for your reply Angel

Best regards
Vingborg
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Vingborg  
#5 Posted : Tuesday, August 26, 2014 4:44:49 AM(UTC)
Vingborg

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Hello again Angel

Forget my question for now..

I'll go with the 187 ohm resistors - They should arrive at my house this day..

I hope by replace R1-R4 with 187ohm resistors, will increase the output.

Henrik
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