Some thoughts on the T-Reg - diyAudio
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Old 10th November 2012, 03:10 PM   #1
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Default Some thoughts on the T-Reg

Saw on Jan's site that a batch of T-Reg boards are out for final testing. I've had this on my wish list for a while.

I simmed a Bode Plot using a strapped 6BQ5 -- ymmv as these tube models seem to leave a lot to be desired. Also used Zetex ZTX450/550 for the error amplifier since I have plenty around.

When the boards are available we'll run a real test.

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Old 10th November 2012, 06:52 PM   #2
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This is the schematic I'm using -- changed the error amp transistors to those with lower Cob:

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Old 11th November 2012, 01:21 PM   #3
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Ok, everyone using a Maida regulator look at this:

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The devices were compared under equally light load, with equal perturbation voltage of the error signal. A pair of TIP50's was used for the Maida.

Once again, ymmv.

I am going to have to try this with the LT3080 based regulator...
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Old 11th November 2012, 03:03 PM   #4
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The newer version works well with a MOSFET.
Needed to adapt the control circuit, but it seems to work well, proabbly start testing week after next.

jan
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Old 11th November 2012, 11:12 PM   #5
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I see you've temp compensated U1.

There must be a "ubangi in the fuel supply" (W.C. Fields in "You Can't Cheat an Honest Man", circa 1939) as it's not quite simulating correctly.
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Old 12th November 2012, 07:46 AM   #6
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What does/doesn't it do? It does work on the bench here.

Edit: Q5 is a source follower, I guess you got that?

jan
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Old 12th November 2012, 12:44 PM   #7
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Quote:
Originally Posted by jan.didden View Post
What does/doesn't it do? It does work on the bench here.

Edit: Q5 is a source follower, I guess you got that?

jan
Yes, the problem is with my simulator -- had this once before with Multisim -- you have to uninstall it, reinstall. POA. On my laptop with a legacy Multisim 10 it works.
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