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Old 16th October 2009, 11:20 AM   #531
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Has your design seen the day of light yet?
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Old 16th October 2009, 01:51 PM   #532
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Quote:
Originally Posted by jackinnj View Post
The Super Reg is most often used with preamps -- and the load is pretty much constant -- noise is a more important consideration.

If you must do transient testing you can take a look at this application note by Jim Williams of Linear Tech:
http://www.linear.com/pc/downloadDoc...1,P1754,D17358
I don't know how I missed this one. I thought I had all of Jim's app notes on regulators :/

Thanks Jack!
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Old 17th October 2009, 10:53 PM   #533
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Quote:
Originally Posted by peranders View Post
Has your design seen the day of light yet?
No, I got sidetracked with the LME49600 buffer design -- I think that one should be put to bed, fwiw.

I want to do some more work on the PCB, ground plane etc. before I send out the design to be burned.
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Old 28th October 2009, 03:43 PM   #534
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Just so y'all know, Old Colony still has the boards from the original article -- I just ordered some more yesterday. Apologies to everyone at ADI --there's an LT115 in there, but I promise to switch it out for an AD825!

Click the image to open in full size.
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Old 7th November 2009, 02:25 PM   #535
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Here it is installed in a CROWN IC-150A preamplifier -- it's mounted on the rear panel on nylon standoffs -- I have LT1028's in there I think:

Click the image to open in full size.

The Crown power supply runs to +/- 30VDC which had to be reduced with some resistors - elsewise I would be blowing up caps again -- the preamp itself doesn't draw a lot of current, but the regulator is a tad thirsty for milliamps.
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Old 7th November 2009, 03:07 PM   #536
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Looking good Jack. Remote sensing?
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Old 7th November 2009, 03:21 PM   #537
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Quote:
Originally Posted by ikoflexer View Post
Looking good Jack. Remote sensing?
Yes, the Jung Regulators with the Old Colony Boards provide for remote sensing.

I will mount some AD825's on Aries adapter boards when I am done.
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Old 7th November 2009, 03:55 PM   #538
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Originally Posted by jackinnj View Post
Yes, the Jung Regulators with the Old Colony Boards provide for remote sensing.
I know; seeing the wire length between the regulator and load I was asking if you used the feature. Don't know anything about your preamp, perhaps it does ok with highish zout from the regulator.
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Old 7th November 2009, 04:11 PM   #539
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When I get my analyzer I will measure the impedance "in situ" -- figure that you've got a strand of #20 awg wire 4" long.

I also received PA's super reg boards yesterday and will run them through their paces. He enables the flexibility to use both the LM329dz or TL431.
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Old 7th November 2009, 04:34 PM   #540
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20 awg solid wire of 4'' would be about 118nH. You'd get quite an increase in output impedance with that without remote sensing.

I'm looking forward to your measurements. Thanks for sharing your adventures!

Oh, btw, what analyzer will you use? This is something that I wish I had, for sure.
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