SteveTheShadow wrote: puts the SRPP in a situation where it is performing "conventionally" in terms of having about half the HT being presented to each valve.
Actually it isn't convensional because the current through the series pass element contains the shunt current and the amplifier demand, whereas the shunt element contains the shunt current.
Not being pedantic but a successful SRPP is a very complicated beast most of the so called SRPP's seen ins chematics are not liekly to poerform at all well. usually a different resistor is required to make an SRPP work as nature intended. It is a mythical and complicated valve stage. Best left to copying of venerable examples closely and not just thrpowing together any old thing. Take the one from Ongaku or from Loftin and White copy them exactly or don't call your design an SRPP at all.
There is a whole article in Glass audio which honours this vbenerable stage design. After having read that article a few times I couldn't design you one, but I came away in the knowledge that there is more going on in a successful SRPP than I can explain to you. You would have to read the article. in a nutshell there is a fine balance which is perfect and everything else which you see thrown together all over the web is nothing of the kind. this is probably the reason it was mothballed as a stage. Anyway there have been better ideas since. No your thing is in no way shape or form a perfect SRPP. It is an anathema by very nature of having two entirely different currents to handle.
What it actually is, is a neat package which contains a series pass and a shunt regulator which shares one role (the shunt reg acts as the error amplifier for the series pass). the cleverness of it is only the neatness of the package. A proper series pass reg would do that job better. the shunt reg would be a good one anyway and well worth retaining.
SteveTheShadow wrote:
Re this totem pole style reg, surely somebody must have thought of it somewhere in the past, they usually have in this game. I mean not everyone can come up with the Aikido.
Steve
It's probably quite new, mainly because hardly anyone has thought of series and shunt regulating. hardly anyone regulates anyway these days.
Had it been thought of. (Yes I thought of doing both. For a while I had in my all shunt reg supply a 13e1 series element, but found it unnecesary) Yes someone somewhere thought of it maybe. but have they done it and posted a schematic? NO!