audio-talk

So, to get 350V with 5.6V zeners (the lowest noise ones), 1N4734As look like reasonable candidates (1W, cheap and low noise). With a zener current of 100mA and allowing them to get to 80C at the lead (they're good to 200C), the PWL corrected average rating is 5.85V meaning that 60 will get you to 35...

That sounds like a plan Nick. :) Half an amp at 350V would be just the job. :shock: That's a BIG ask for an MJSR-style device... I'll have a look, though it may just be a wired prototype first out. That baby going to cook. Ooooh yes. You'll need at least a 1A CCS (should be no problem) but the Zene...

... And finally you will probably have a nice cap of your choice across the shunt to prevent HF instability anyway. There's a 10uF @ 400V polypropylene MKP cap across the shunt in the MJSR. The CCS in that design will deliver up to 200mA but those zeners won't do that - max rating ISTR is 100mA, i....

Interesting use of the word 'great with which I am not familiar! Yes, that was my thought, great until it suddenly is very not great, or if you happen to be the wrong person, never great. There was more than a touch of irony in my comment... You have to pay rent yearly in advance here. If you get c...

Iirc your mj statistical reg board was capable of 20ma or so, so presumably then if the zeners were a different higher current capable type, and the number of them altered to give the correct v, and the 3 pin regs scaled appropriately then the concept would be scaleable to ht voltages and currents?...

If you're going SS you could start with an MJ "Maida regulator" (based on LM317 or LT3080) but he says that the "Statistical regulator" is quieter and more robust.

Example Maida purloined from HeadFi:

Here's a familiar thread from someone not too far away: http://www.audio-talk.co.uk/phpBB2/viewtopic.php?t=3887

As you said, it's a bugger about the pictures...

I hate modern bright headlights dim or main beam. Agree about handbrake and, it seems, more and more people are too important to use indicator lights any longer. Here in Dubai, by law you are supposed to use indicators... but no-one does as the locals consider using them a sign of weakness. As a co...

The 13E1 was originally designed for series pass regulation. Never tried it like that myself - would be interested in the results - it is beautiful. Originally got mine with the intention of building a Crystal Palace, but it never happened...

You wouldn't consider a shunt reg instead?

Touch one of the secondary connections while holding a water pipe. Afaik consumer units don't measure earth current directly. Most people here will know this, so apologies, but for those that don't: It's certainly not usual - RCD/RCCBs only trip on L/N current imbalance, typically around 30mA and n...

Maris :mrgreen: :mrgreen: :mrgreen: Sadly I don't think potatoes have any brain cells that I know of. So can you actually bully a potato, well you can chip it, mash it, roast it, fry it, boil it, is that bullying it. As far as I know they don't have the awareness to realise anything. ... Stanislaw ...

Looking good!

"Cressy Snr
Oooo, Roberts Radio's sound nice"

Indeed they do. The R66 from 1957 is one of my favourite sets

This is really interesting. I used a lot of gate drivers in my Tesla Coil days, but they were all two-state, on or off, never linear. High Qg in low RDSon high voltage FETs were always a bitch to drive, so I tended to use either Maxim devices or the ubiquitous UCC36321/2 chips. For HV isolation we u...

Its down to inertia and the cost in time getting used to another toolchain. Completely agree. I still believe that the right technical decision is to go to CircuitMaker, but lack of bandwidth to manage the transition means I just paid the money to Autodesk for 1 year's Standard license - I used to ...

So you've stuck with Eagle... I'm still 50/50 staying Eagle or going Circuit Studio... CS allows you to import all your Eagle stuff and have access to all of Altium's huge component catalogue.... supposed to be quite intuitive to use, but, hey, anything is intuitive compared to Eagle.... There's a b...