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Old 13th January 2013, 09:16 AM   #11
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Quote:
Originally Posted by kacernator View Post
Well, it is hard to get LT3080 in my country and LM317 is ten times cheaper. Any suggestion for LT3080 alternative?

I would be very curious about your results trying pretracking regulator with your 21st century maida regulator circuit.
I also have problems to get LT3080.

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Originally Posted by kacernator View Post
I have tried SSHV1 and it sounds good, but too much heat. I am totally happy with TPR as subjective sound performance is concerned.
What's TPR?
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Old 13th January 2013, 09:36 AM   #12
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TPR is abbreviation for "tracking preregulator".
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Old 13th January 2013, 10:39 AM   #13
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Thanks.
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Old 13th January 2013, 06:22 PM   #14
tomchr is offline tomchr  United States
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I haven't compared against the SSHVx. However, the ripple rejection of my regulator is so good that I can't see any ripple on the output even with 50 Vpp ripple on the input. Furthermore, the output impedance is very low across the entire audio band. It's better than Jan Didden's T-reg regulator. So I'm confident it's the best I can do with the components available today.

Farnell in Europe should be able to help you out with the LT3080. I can also help you out with an assembled module. Just PM me.

~Tom
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Old 13th January 2013, 07:00 PM   #15
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I have found that LT1085 is available in my country, which should be better than LM317.
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Old 13th January 2013, 08:20 PM   #16
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Default Cap needed?

I have looked at more maida regulator implementations and sometimes there is cap after the 47R which bypasses first reg´s input to ground. In the LB-47 application there is no cap. Do I need this cap for stability?
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Old 15th January 2013, 03:55 PM   #17
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Default Adjust pin bypass?

Can I also bypass adjust pin of the second LM317 to improve ripple rejection or it is already bypassed with 1uF? If it can be bypassed, then whrer should I connect the bypass cap? From adjust pin to ground?

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