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18th November 2011, 06:50 PM
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#2 |
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diyAudio Member
Join Date: Mar 2007
Location: Auckland, NZ
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how about this?
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Yes, conservatism thrives on low intelligence and poor information. But the liberals in politics... continue to back off, yielding to the supremacy of the stupid. It's turkeys all the way down. - George Monbiot, guardian.co.uk, 6 Feb 2012 |
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25th November 2011, 08:33 PM
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#3 |
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diyAudio Member
Join Date: Mar 2008
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I am curious ...
What is the purpose of the EF80 in the middle ? Stabilize the DC operating point ... ? How ? I did some recalibration on the resistor networks to accomodate a pair of PL504. And some other modifications like NFB and xfrmr hookup. Seems to work well. The adjustment of the standing current is very sensitive though - may easily run away.
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Judge: This court appreciates that you invented physics, Mr.Newton, but unfortunately you can't have a patent on it. |
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25th November 2011, 10:50 PM
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#4 |
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diyAudio Member
Join Date: Nov 2011
Location: Athens
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This is not SRPP this is SEPP .
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27th November 2011, 06:30 AM
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#5 |
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diyAudio Member
Join Date: Mar 2007
Location: Auckland, NZ
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yeah, but its as close as you're going to get...
__________________
Yes, conservatism thrives on low intelligence and poor information. But the liberals in politics... continue to back off, yielding to the supremacy of the stupid. It's turkeys all the way down. - George Monbiot, guardian.co.uk, 6 Feb 2012 |
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27th November 2011, 04:53 PM
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#6 | |
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diyAudio Member
Join Date: Oct 2010
Location: Heemskerk
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Quote:
Max |
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27th November 2011, 07:29 PM
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#7 |
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diyAudio Member
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I made one just for fun. Here is the thread
EL86 Single Ended PP Power Amplifier I will not recommend making SRPP power amplifier though.
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27th November 2011, 11:32 PM
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#8 | |
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diyAudio Member
Join Date: Nov 2011
Location: Athens
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Quote:
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28th November 2011, 09:04 PM
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#9 | |
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diyAudio Member
Join Date: Mar 2008
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Quote:
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Judge: This court appreciates that you invented physics, Mr.Newton, but unfortunately you can't have a patent on it. |
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28th November 2011, 09:14 PM
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#10 | |
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diyAudio Member
Join Date: Mar 2008
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Quote:
at Pout over 10W the upper tube seems to fight the lower tube, so at 15W the upper tube shows plate dissipation of 30 W average and 80W peak. A lot even for a sweep tube. this doesn't happen at lower output ... usual SRPP style circuits don't do that, actually dissipation drops when overdriven. expect red glowing plates during sine wave testing. music program may be just O.K. though
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Judge: This court appreciates that you invented physics, Mr.Newton, but unfortunately you can't have a patent on it. |
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amp with SRPP output stage? post if you know one
