[randytsuch]

I was going to build an ALW Jung regulator for my squeezebox project, and I remember seeing a thread at pink fish media about changing out the pre regulator with something, so last week I did some research over at PFM.

A guy named Teddy came up with a VBE, or capacitor multiplier circuit to replace the pre-regulator that is designed into the ALW version of the Jung.

There is a thread here about it.
http://www.pinkfishmedia.net/forum/showthread.php?t=29501&highlight=jung+regulator

Later, he came out with the Teddy Regulator.  It’s basically a LM317 or LT1086 regulator with a VBE after the linear.  A pretty simple circuit, and people have replaced Jungs with Teddy’s, and liked the Teddy’s better.
How to build thread
http://www.pinkfishmedia.net/forum/showthread.php?t=39990
Original teddy thread
http://www.pinkfishmedia.net/forum/showthread.php?t=36174

And also, a higher powered Teddy reg.  Supposed to do very well powering a gain clone type amp.
http://www.pinkfishmedia.net/forum/showthread.php?t=39306&highlight=teddyreg

So, I have decided to give the Teddy a try, will be building a bunch of them, 5 for now, to provide power for the buffers and analog power to the DAC in my squeezebox project.

What do you guys think of this?

Randy

[JoshK]

Randy, thanks for sharing.  This will be one of those ideas I will store in the back of my mind for a later date when I have time to explore.  I've heard of capacitive multipliers before but I don't really understand all the details.   However, it does look like some of the simple regulator improvements ideas I've seen before.  Definitely worth exploring. 

[randytsuch]

Randy, thanks for sharing.  This will be one of those ideas I will store in the back of my mind for a later date when I have time to explore.  I've heard of capacitive multipliers before but I don't really understand all the details.   However, it does look like some of the simple regulator improvements ideas I've seen before.  Definitely worth exploring. 

Hi Josh,
Good luck with it, when you try it.
There are some things to remember, when you try it.  Appearantly, start up time is kind of slow, so it is not suitable for all circuits, example I saw was you can't use if to power on CDP clock.  Reducing R3 will make it start up faster. 
I also saw someone had some problems using the Teddy to power a processor based circuit, because of start up time issues.

Also, output is load dependent, making it harder to calculate the resistor values.  I did see Teddy recommend putting a 1K resistor on the output, so there is always a load on it, making the load variance much less.  Otherwise, there is a 0.5 V change from no load to load conditions.

I have started to assemble my Teddy's, although I am waiting for the last part I need, some 100uf Silmics for the output caps.

Randy