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Old 18th April 2013, 03:48 PM   #681
Stefanoo is offline Stefanoo  Italy
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sorry for taking so long, but I got back from Italy 2 days ago and I still got jet lag so didn't do much.
Hopefully this weekend I will be able to try the new buffer and report listening impression!
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Old 18th April 2013, 04:30 PM   #682
Joachim Gerhard is offline Joachim Gerhard  Germany
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I listen to it everyday. I have tried different power amps and speakers.
I am still very satisfied, the result is always very good, no matter the combination.
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Old 18th April 2013, 08:58 PM   #683
Stefanoo is offline Stefanoo  Italy
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Quote:
Originally Posted by Joachim Gerhard View Post
I listen to it everyday. I have tried different power amps and speakers.
I am still very satisfied, the result is always very good, no matter the combination.
interesting!
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Old 18th April 2013, 09:46 PM   #684
Stefanoo is offline Stefanoo  Italy
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is the 150pF needed across CB? Have you tried to remove it to see if it oscillates without?
I will likely build one tonight.
To try it on the differential circuit I will have to build two of them, don't know if I have enough energy tonight

EDIT: Nevermind, just simulated and without caps frequency response gets a bump at about 30MHz
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Last edited by Stefanoo; 18th April 2013 at 09:50 PM.
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Old 18th April 2013, 09:57 PM   #685
Joachim Gerhard is offline Joachim Gerhard  Germany
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I use the 150pF.
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Old 19th April 2013, 08:31 AM   #686
RCruz is offline RCruz  Switzerland
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What are the RLp1 and L1 for ?
Attached Images
File Type: jpg HCC%20Buffer%20vers%20modulated%20HCC%20Buffer.jpg (345.9 KB, 159 views)
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Old 19th April 2013, 08:48 AM   #687
Joachim Gerhard is offline Joachim Gerhard  Germany
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That is a zobel to decouple long cables. I use it.
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Old 19th April 2013, 09:20 AM   #688
RCruz is offline RCruz  Switzerland
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Thank you, what are the main differences between the two circuits ?

You built the left one ?
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Old 19th April 2013, 11:12 AM   #689
Joachim Gerhard is offline Joachim Gerhard  Germany
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No, i build circuit B.
I promised Calvin to keep the discussion of this buffer in the original thread.
There you find all information.
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Old 19th April 2013, 12:42 PM   #690
MiiB is offline MiiB  Denmark
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Difference is the Rail to rail cap, making additional Rc Rail filtering..
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