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Old 1st May 2013, 12:48 PM   #2051
olafk is offline olafk  Germany
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Now I changed all 330p to 100p. Slew rate is better as expected.
(10 + 20kHz). I hope, the probes are correct, but 20cm wire.

regards
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File Type: jpg 10kHz_100p.jpg (413.3 KB, 808 views)
File Type: jpg 20kHz_100p.jpg (442.7 KB, 696 views)

Last edited by olafk; 1st May 2013 at 12:59 PM.
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Old 1st May 2013, 01:39 PM   #2052
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Quote:
Originally Posted by olafk View Post
Now I changed all 330p to 100p. Slew rate is better as expected.
(10 + 20kHz). I hope, the probes are correct, but 20cm wire.

regards
Thank you for this measurements, result is very good.
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Old 1st May 2013, 02:28 PM   #2053
AndrewT is offline AndrewT  Scotland
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This latest pic looks different from the previous input.
Have you swapped scope probes?
I ask again
Quote:
Are your probes adjusted to show squarewaves correctly?
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Old 1st May 2013, 02:54 PM   #2054
olafk is offline olafk  Germany
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No, I did not swapped the probes. But I changed the Cap at input from 330 to 100p.
It looks like a better slew rate but a bit more overshoot. But I have no particular experience.

regards Olaf
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Old 1st May 2013, 02:56 PM   #2055
olafk is offline olafk  Germany
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Have you seen the input without amplifier? Looks good.
If amp is connected, input has peaks?!

reegards Olaf
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Old 2nd May 2013, 07:53 AM   #2056
Denmas is offline Denmas  Indonesia
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I like the Apex AX11, and this is not foreign to me because it is similar to the scheme Sansui AU217
Greetings Denmas.
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Old 2nd May 2013, 08:41 AM   #2057
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AX11 with TO3 outputs
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Old 2nd May 2013, 10:15 AM   #2058
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I like the Apex AX11, and this is not foreign to me because it is similar to the scheme Sansui AU217
Greetings Denmas.
Thanks for this info, yes it's same topology.
Regards
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Old 2nd May 2013, 01:11 PM   #2059
PetruV is offline PetruV  Romania
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What is the advantage of using to3 transistors
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Old 2nd May 2013, 01:13 PM   #2060
AndrewT is offline AndrewT  Scotland
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What have you blown up today?
To3 is more resistant to blowing up.
Maybe what you need to suit your building style: switch on and hope/pray/have faith.
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