audio-talk

The first (and only) turntable I made had a platter of phosphor bronze that I turned from a casting on a Myford ML7. It was my 6th form DT project. I also made the oil-damped unipivot arm, that went with it - still have bits of that, 40 years later... FWIW, turning a platter is very very tricky to g...

Another vote for Raspberry Pi with a DAC hat and max2play - I use the IQaudIO Pi-DigiAMP+ or Pi-DAC+. In the Pi-DAC+ they use the TI/Burr-Brown PCM5122 - 32bit @ 384kHz - see http://iqaudio.co.uk/audio/8-pi-dac-0712411999643.html - the Pi-DigiAMP+ includes a 35W/chan class D amp too and is based on ...

Have a look at the Aneng AN8008. Astonishing value for money and genuine TrueRMS - many reviews out there including eevblog and detailed ones from Mark Henessey, a BBC lecturer . The 8002 is also worth considering and has slightly different characteristics. Paid about 14 quid for mine on Banggood - ...

Not to say I wouldn't like one of these to play the precision game, but it would be just the collector of test kit impulse http://www.keysight.com/en/pd-1000001297%3Aepsg%3Apro-pn-3458A/digital-multimeter-8-digit?cc=GB&lc=eng If you bide your time, who knows what will turn up... I sold all of m...

in my paupers defence though I wonder what benefit there is watching a square wave on a 500mhz scope over watching the same square wave on a humble 60mhz scope, in this hifi amp example..... Transient response, ringing, overshoot, rolloff, frequency response, HF oscillation (can be in the 10s or 10...

Or just host stuff within a Google doc and instead of an embedded image post the link to a Google doc (accessible to anyone who has the link). That's probably the way forward until a competitor to photobucket springs up. For NEONIXIE-L (which I own & manage) I have set up a Google Drive with pe...

What's that Q1 thing in the circuit above ? It is indeed a Mosfet - the "Maida" regulator is not an invention of Morgan Jones - it's named after Michael Maida - who wrote an application note back in the 1980s - see http://www.ti.com/lit/an/snoa648/snoa648.pdf - he was at National Semicond...

Oops! just realised sorry Jack if separate shunt regs for each valve, then it only needs to be 310V at 150mA capability. I'm a silly b'stard. :lol: That's pretty much within the capabilities of the current boards - you'd need a second extension board as, using 1N4734As, the maths shows an adjusted ...

Oh poop. Catching up here is first I realised my photobucket restricted. Would cost $39 a month to get back what was free. Sooner or later a competitor will blow photobucket out. Until then. I have no solution. It's a major pain in the scrotum. Some forums I use have switched to imgur and there are...

Didn't realise everyone here hailed from the Great Satan. Next time I use irony I'll put my hand up first :) So, if someone says "Great amplifier, Dave", check to see if they've put their hand up in the air first. If they have, they're a snide bastard and you're legally obligated to thump ...

Wonder if nick could do a 47v linear supply for the phono stage, its responded well to balanced power so i reckon a decent main psu would make a significant difference This is not the "Nick" you were looking for (waves his hand in an obsure, Jedi, way...), but... ...have you considered a ...

Istanbul, near the spice market. #2 son in foreground running away as he didn't want to be in the shot. Wonder why?

Don't these people think at all before naming their shop in (sort of) English

Half an amp at 350V would be just the job. What are you going to do with the 175W of heat? If you want such a shunt, then I would make it active, not a string of zeners, and look at something like this as the power device, then worry about driving it. http://ixapps.ixys.com/DataSheet/DS99957B(IXTH-...

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...