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Old 25th February 2013, 06:48 PM   #61
tomchr is offline tomchr  United States
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Rather than typing the component values into LTspice in ohm, farad, etc. I strongly suggest using prefixes. Just beware that any spice simulation is ignorant of common conventions and doesn't distinguish between lower and upper case letters for prefixes. Hence m or M is milli (m) = 1E-3 and Meg is used for M = 1E6.

It's a lot easier to read the schematic and avoid mistakes when a capacitance is listed as 220n rather than 0.00000022 (I hope I got the number of zeros right).

~Tom
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Old 25th February 2013, 06:56 PM   #62
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Thanks Tom, first of all I will try inpout stage LED and output stage with RC.
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Old 25th February 2013, 07:16 PM   #63
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Quote:
Originally Posted by tomchr View Post
Hence m or M is milli (m) = 1E-3 and Meg is used for M = 1E6.
Which is why, after only 50 years or so of drawing schematics with a pencil or pen I settled on using the explicit form. It's actually easier, when working with a simulation, to delete or add a zero than it is to move a k.
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Old 25th February 2013, 08:19 PM   #64
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How many current draws all stereo headphone amp?
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Old 25th February 2013, 10:02 PM   #65
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I read 50mA but it seems to much, someone can confirm or knows real power consuption?
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Old 25th February 2013, 10:43 PM   #66
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20.76mA~

Run the transient simulation, hover the cursor (current clamp icon) over the voltage source, look in the bottom left-hand corner of the window - (minus)10.3806mA (per channel).

To see the tube dissipation, run the DC operating point simulation (right click schematic, 'Edit Simulation Cmd./DC op pnt', click OK, right click schematic, 'Run'), close the OP window, hover the cursor (pointing hand icon) over the tube, read the dissipation in the lower left-hand corner of the window.
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Old 26th February 2013, 07:04 AM   #67
Stixx is offline Stixx  Germany
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50mA is the amount the psu has to be capable of... the actual consumption was something like 23mA in my build.
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Old 26th February 2013, 11:31 AM   #68
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Thanks guys I suspected was a lot less.
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Old 26th February 2013, 06:24 PM   #69
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What disappointment sounds much better my mu-follower.
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