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.
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.
An externally hosted image should be here but it was not working when we last tested it.
This is the schematic I'm using -- changed the error amp transistors to those with lower Cob:
An externally hosted image should be here but it was not working when we last tested it.
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...
An externally hosted image should be here but it was not working when we last tested it.
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...
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.
Hmmm (bis)
Why not keeping it simple, I like simple
Mona
I like simple too. I designed it with the LR8N3 (a $0.60 part) to avoid the necessity of separate bias supply. LM334+1N4148 probably has better impedance than the single LND150, but I would want to measure it.
The DN2540 being a DMosfet is just very easy to work with.
With the LR8N3 you need some current from the output to get it working.And enough voltage drop.
The control voltage for a depletion fet is outside the aux. supply as with a tube.
With an "ordinary fet" the control stays within the range of the aux. supply.No need of a resistor to ground nor high voltage transistor.
Mona
The control voltage for a depletion fet is outside the aux. supply as with a tube.
With an "ordinary fet" the control stays within the range of the aux. supply.No need of a resistor to ground nor high voltage transistor.
Mona
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