I would mirror it for you guys but I have no symmetric HV gear to test it. Sorry.
Please generate one if it's not too much trouble for you.
Don't know what it might go wrong guys if I don't have an application to really test it on.
I know that equation is on the first page but, the confusing thing is that quanghao's schematic shows i840= 0.2 Iccs, other posts have indicated this as well.
10-4 and thanks.
Where do you guys buy these big 15W+ heat sinks? I can't find anything at digikey. Would like to buy a thick 3" finned strip that I could cut to size to fit in a typical tube amp chassis. My understanding is you want this shunt regulator in the same chassis as the tubes to keep the B+ wire short as possible.
This shunt reg I think will turn the headphone SET amp world upside down with a simple 6c45pi spud amp+OPT. Basically no electrolytics in the signal path anywhere. Exciting stuff. I love the way Salas brings new technology to improve ancient but wonderful designs.
US and Canada guys may be more useful to give you heatsink sources given your location. The ''super reg'' concept, namely parallel regulation fed from CCS made with semis, dates back to the Stax company in Japan in the early 70's. Lux and Kenwood had some obscure basic ones in very few top models of their's a bit later too. The VR ionization valve diodes with radioactive trigger were the ''vacuum Zeners'' first to stabilize in parallel. If there were constant current fed, then it was the same concept. I haven't researched if they were ever utilized with referenced error amp loop back then, so to be classified as regs or just stabilizers though. Since I am a tube guy too, I wanted to get rid of the typical problems and cost and bulk of passive filters, also it had to better the Maida subjectively for there to be reason making it. Some extra heat penalty wouldn't frighten tube DIYers, used to it. I knew from myself that tube DIY hates many parts and BJTs. Mosfets and basic it had to be, if to be tested at all by my mates too. It proved that it will not block tubes tone, to the contrary. The rest you know it, its chronicled in this thread.
we too
Allen Wright and Gary Pimm were long time proponents, unfortunately I haven't made any research on their work before doing the simplistic hv. It could have been even better if I had draw from their experience too. I based it on my low voltage simplistic reg experience and some parts. Gary has contributed early in this thread about pcb practice and I thank him for that. Also Zen Mod and his DIY pink panthers gang chanting the ''shunties'' for DIY in general.
Super low. Anything about 50-200mV RMS I consider it good prefiltering. Especially with IRF9610 it filters good up high by itself. But you may prefer an IRFP9240 or IRF9640 for boosted gate reliability. Shifts a bit tonally to the left with heavier Ciss Mosfets, to the right with lighter. Depends on the total thing you fit it to.
Thanks for all the help, since this is a headamp where low ripple is critical I can easily prefilter to 1 mV with a simple CLCRC filter.
One thing I wanted to ask the group, since we need to keep the shunt reg circuit by the tubes, I am finding it difficult to integrate a 30W heatsink into a classic tube chassis. Anyone have a chassis that looks good with the big heatsinks?
One thing I wanted to ask the group, since we need to keep the shunt reg circuit by the tubes, I am finding it difficult to integrate a 30W heatsink into a classic tube chassis. Anyone have a chassis that looks good with the big heatsinks?
Don't know about aesthetically pleasing big sink on a tubes chassis, there must be nice configurations to invent. But a sink must be set free of obstructions with its fins perpendicular so air can flow right. Also I see many people participating in that GB for pcbs, I just hope that the layout and applications will get lucky for most, because a reg like this isn't guaranteeing it will work just with everything. Don't expect me to start debugging people's configurations if it will not play with some loads or settings. I have even seen talk about putting chokes in series and splitting after the reg. Yeah, that will be the day for its Zo or stability.
Can you pls post a link of that schem? I searched, but no compatible results. Thank you.
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