New type of vacuum tube

Sucker bait for audiophools. ...Jim Thompson

-- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | San Tan Valley, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at

With dirt-cheap color LCDs killing VF displays, I can see why Noritake would be desperate, but that's absurd any number of ways.

It does look sort of like the Hamamatsu MEMS photomultiplier, which is cool but unobtainable.

On Thu, 25 Jun 2015 07:14:28 -0700, Jim Thompson Gave us:

I remember the military jobs Raytheon made that were the size of one's baby finger. They had heaters though. That was back in the fifties.

Nuvistors were smaller

NT

You missed the point... it's a semiconductor equivalent to a triode with "... generating the same rich harmonics which vacuum tubes are known for".

Barf >:-} ...Jim Thompson

-- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | San Tan Valley, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at

But it's a tube, not a semiconductor, isn't it?

Cheers

On Thu, 25 Jun 2015 15:49:41 +0100, Syd Rumpo Gave us:

Did you even go look?

Methinks these are them: I have some old 1950's Motorola radios that use those tubes. I had to buy some for repairs a while back and was pleased to find that some are still available:

I'm not sure what such a tube could be used for, except perhaps overpriced hi-fi equipment and EMP resistant devices:

With a 30,000 hour mtbf?

With a 30,000 hour mtbf?

That 6P1 has heaters. The Noritake VF displays have heated filaments, so they probably used the same technology.

We used to stock a few Noritake VF displays, and I bet I could get one of them to work in triode mode, with gain. We've had to design a couple of them out, as they were discontinued.

That's unclear. My take on it is that it's a hybrid semiconductor circuit which emulates a tube. ...Jim Thompson

...Jim Thompson

VF displays last for decades. The filaments run at low temperature, not even visibly glowing. This thing is just a VF with two giant pixels and no phosphor. They should add an orange phosphor to make it look more like a toob.

Not necvessarily. Even audiophools don't want harmonics, rich, poor or otherwise. the intended market is probably for the overdrive stages of guitar amps. Korg is a musial instrument company, not a hifi company.

I still have a pile of 6CW4 and 6DS4 Nuvistors (mostly to fix old Tek scopes). I have an 60KHz WWVB amplifier that I built long ago that I use for testing them. After 55 years, they still hold a vacuum and still work nicely. You can still get them new from Russia:

How about a hi-fi with a surface mount PCB and Nuvistor tubes? Nothing sounds better than an amplifier with a built in noise source.

LOL

Sno-o-o-o-ort >:-}

I grew up on tubes, built my first transistor power amp (class-A) ~1957. Built a real deal 30W class-B with Motorola RF transistors ~1963. I'd never go back to tubes... they don't sound realistic... and I judge based on playing in orchestra and I know what real Mozart should sound like. ...Jim Thompson

I do not mind audiophools so much. I would like to design things that make them happy such that they will give me their money. It would be a mutually beneficial arrangement as their psychology probably won't change - they'll just give the same money to someone else who isn't me.

Someone online somewhere made a preamp using VF displays, but I can't find a link at the moment.