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Old 16th November 2016, 01:59 PM   #1
WalterW is offline WalterW  Netherlands
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Default Pass XA25?

I saw one at a picture from BAF2016. So i googled this:

Pass Laboratories XA25

Read the description and look at the artwork picture. A new amp SE with hockeypucks. 700W 40 A
Nice!
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Old 16th November 2016, 02:52 PM   #2
Zen Mod is offline Zen Mod  Serbia
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yup

I was puzzled by that picture,too

just starting Babelfishing , though having just thyristor pucks at hand

who know , maybe it'll work .....
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Old 16th November 2016, 04:28 PM   #3
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Interesting. A new PL amp I can actually lift. I want it.
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Old 16th November 2016, 07:15 PM   #4
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Based on specs it's almost certainly push pull, but the description "single ended circuitry" seems to contradict that.
More Papa magic by the sound of it.
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Last edited by 2 picoDumbs; 16th November 2016 at 07:19 PM.
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Old 16th November 2016, 08:14 PM   #5
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Quote:
Originally Posted by WalterW View Post
I saw one at a picture from BAF2016....with hockeypucks. 700W 40 A
Nice!
with IXYS IXFN ?
Two transistors beacause CCS maybe ?
Always interesting amp non surprise....oh yes
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Old 16th November 2016, 10:33 PM   #6
Zen Mod is offline Zen Mod  Serbia
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here we go again .......

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Old 16th November 2016, 11:21 PM   #7
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Quote:
Originally Posted by 2 picoDumbs View Post
Based on specs it's almost certainly push pull, but the description "single ended circuitry" seems to contradict that.
More Papa magic by the sound of it.
Perhaps a variation on the Aleph CCS?
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Old 16th November 2016, 11:45 PM   #8
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Quote:
Originally Posted by needtubes View Post
Perhaps a variation on the Aleph CCS?
Yeah certainly possible, even Mu Follower can exceed well past the quiescent bias point if setup correctly.
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Old 16th November 2016, 11:55 PM   #9
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Is this the amp from the "Villars" pic?

Click the image to open in full size.

Last edited by res07njc; 17th November 2016 at 12:03 AM.
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Old 17th November 2016, 12:15 AM   #10
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Quote:
Originally Posted by res07njc View Post
Is this the amp from the "Villars" pic?
Likely not. From the Villars 2007 thread:

Quote:
Originally Posted by Nelson Pass
I was exploring was the ability of cascoding to improve the Gate-Drain
capacitive nonlinearity of the hockey pucks. In this case it was not particularly
good. I will add that there are no additional plans for this circuit approach at
this time...
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