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-   -   Some thoughts on the T-Reg (http://www.diyaudio.com/forums/power-supplies/223290-some-thoughts-t-reg.html)

jackinnj 10th November 2012 03:10 PM

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.

http://www.tech-diy.com/RegPowerSupp.../TReg_Bode.jpg

jackinnj 10th November 2012 06:52 PM

This is the schematic I'm using -- changed the error amp transistors to those with lower Cob:

http://www.tech-diy.com/RegPowerSupp...g/TReg_Sch.gif

jackinnj 11th November 2012 01:21 PM

Ok, everyone using a Maida regulator look at this:

http://www.tech-diy.com/RegPowerSupp...Comparison.gif

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...

jan.didden 11th November 2012 03:03 PM

1 Attachment(s)
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

jackinnj 11th November 2012 11:12 PM

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.

jan.didden 12th November 2012 07:46 AM

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

jackinnj 12th November 2012 12:44 PM

Quote:

Originally Posted by jan.didden (Post 3238336)
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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