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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.

jackinnj 10th November 2012 06:52 PM

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

jackinnj 11th November 2012 01:21 PM

Ok, everyone using a Maida regulator look at this:

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

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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.


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?


jackinnj 12th November 2012 12:44 PM


Originally Posted by jan.didden (
What does/doesn't it do? It does work on the bench here.

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


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.

jackinnj 3rd June 2016 09:56 PM

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AndrewT 5th June 2016 08:25 AM

I can't get any of the pics linked in posts 1, 2 & 3 to download.
Any chance you could attach them instead?

Ketje 5th June 2016 12:00 PM

1 Attachment(s)
Hmmm (bis :D )
Why not keeping it simple, I like simple :idea:

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