John Curl's Blowtorch preamplifier part II

[simon7000]

I spent 11 years at Nokia and it still does my head in!

Producing custom silicon for phones these days must cause many uclers and sleepless nights. Huge investment in development using hairy processes, but sales price per unit in cents and only one visit from the fsck up fairy and you've blown profit for the line.

Samsung!!!

 

[DPH]

Samsung was more than one visit. I think the whole population at the fairy ring was on a mission.

 

[billshurv]

Samsung is a special case. The fairy in that case could take out the whole division.

 

[Kindhornman]

And why didn't they catch that problem with Lithium ion batteries before they ever shipped those phones, hard to understand how that got so out of control before they realized this? With all the knowledge about overcharging and other issues with those batteries I can't comprehend how this ever happened. I'm sure other phones have some percentage of battery failures but these were known issues for so long now.

 

[DPH]

My amateur view is that either a different LiIon vendor (multi-vendor supply) was chosen or someone's process has gone slightly sideways from validation.

But I really don't know.

 

[nicoch58]

Nobody is paying an additional $10.00 to add an ESS chip to a cell phone, that is nuts!

Lg V20 ES9218

 

[billshurv]

Reading some of the analysis there was such a culture of fear instilled by the management that no one dared put their hand up. Wouldn't be the first time this has happened, and certainly won't be last. Even NASA has suffered from this. But still going to hurt them for a very long time!

 

[scott wurcer]

Nobody is paying an additional $10.00 to add an ESS chip to a cell phone, that is nuts!

More than $0.50 for an amplifier and the jaw hits the floor.

 

[scott wurcer]

Lg V20 ES9218

And they're not paying 1000 piece book price, how little would surprise you and how much surprises me.

 

[scott wurcer]

My amateur view is that either a different LiIon vendor (multi-vendor supply) was chosen or someone's process has gone slightly sideways from validation.

But I really don't know.

The recent failures from the same vendor as Apple has me thinking the charging infra-structure will end up being involved. Lot's of designers will get "window seats" in that case.

 

[rayma]

Leo Beranek Dies at 102

Leo Beranek, Acoustics Designer and Internet Pioneer, Dies at 102
https://en.wikipedia.org/wiki/Leo_Beranek
http://www.nytimes.com/2016/10/18/b...-region&region=bottom-well&WT.nav=bottom-well

 

[scott wurcer]

Leo Beranek, Acoustics Designer and Internet Pioneer, Dies at 102
https://en.wikipedia.org/wiki/Leo_Beranek
http://www.nytimes.com/2016/10/18/b...-region&region=bottom-well&WT.nav=bottom-well

Amazing guy amazing place (BB&N).

 

[Destroyer OS]

Now how does playing a disk demagnetize a cartridge, that just doesn't sound right! And what are you demagnetizing, surely not a moving magnet?

Honestly I have no idea why it works, but your cartridge sounds better after.

 

[Kindhornman]

Destroyer,
sounds like wishful thinking to me, some expectation bias. What can you put in a record groove that does anything but move the stylus no matter what the waveform?

 

[john curl]

Kindhornman, why be so critical? I have heard about things like this for decades. I even own a electrical 'cartridge demagnetizer' myself. Apparently, it effects, not the primary magnet, but an added magnetic 'slug' that is added to the cartridge that increases its output. It is not supposed to be magnetized, but it does, over time, probably due to the closeness to the primary magnet.

 

[Pano]

The Samsung battery scandal is amazing. I was flying across the east coast today, and hearing announcements at the gates in in the airplanes that the Samsung was not allowed on board, well, that's gotta hurt. I don't remember ever hearing anything like that before.

 

[scott wurcer]

Destroyer,
sounds like wishful thinking to me, some expectation bias. What can you put in a record groove that does anything but move the stylus no matter what the waveform?

We need the full on BS once and a while just to fuel the engines. Why does anyone interested in actual EE care I'll never know.

 

[Kindhornman]

John,
Your talking about an actual demagnetizer, not using a vinyl record to turn the stylus into some sort of demagnetization device. Now how you can selectively demagnetize the slug of metal you are talking about in a cartridge without affecting a magnet in the same device I would like to know? Perhaps the permanence of the real magnet material is strong enough that your demagnetizer isn't strong enough to affect those magnets?

Scott,
If I didn't challenge these statements someone else surely would in this thread I suppose. Curious minds want to hear the justifications for some of these strange statements.

 

[john curl]

I would like to know a whole lot of things, Kindhornman, but I accept some things as I have been told what they do, not what I can easily prove. Keeping an open mind is my position.

 

[scott wurcer]

Scott,
If I didn't challenge these statements someone else surely would in this thread I suppose. Curious minds want to hear the justifications for some of these strange statements.

That's OK we're behind you, OTOH maybe it's just a waste of time.