I'm saying that metaphysically if he's got 110Hz with 165Hz he's got 55Hz.So you're saying Franky has pcp level imagination, hence the greatness from his PC speakers ...
As would you or I. Did you read the article ? There's way more than imagination involved ......
kinda like equipment for music ...
Err, No , maybe you and franky, 55hz missing i would be the first to tell you so, every system i ever had in my entire adult life(EV-30inch woofers in the 70's) had a 3db down point of at least 30hz , lack of bass fundamentals is very obvious to me..
I dont have that level of imagination ...
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Hello and Thank you very much indeed Mr Curl for your kind reply
Actually i tried from time to time to follow the discussion but i got completely lost especially for my poor knowledge. So i have to blame myself mostly.
I will follow your advice immediately
Thanks again and kind regards, gino
Other manu's disagree with you, as dvv stated. Especially if the process, even under control, produces devices with a parametric spread that covers several device categories.
Ah, the quote that started it all:
Your argument is not with me, apparently you should be arguing with the engineer from Seimens.. Perhaps explain process control to them..
So, rending the statement invalid? not quite.
Again, proof by numbers?? And, my number is from 20 years ago..
Actually, it was dvv who pointed out a position of a seimens engineer..you are hell bent on denying that..
Go for it..
jn
Right - so?
What are you saying?
All I said was that the main protection fuse before the transformer is listed as 3.16 A for voltages of 220-240 VAC. Purely mathematically, that would mean the transformer should safely handle a bit below (220 x 3.16) 695.2 VA. Is this wrong?
Knowing factories are sometimes a bit liberal with all this, I reduced this to a useable figure of 600 VA. Feel free to further reduce this to say 500 VA. That's still a hell of a lot more than is usually found in modern amps of that power.
The amp weighs in at EXACTLY 16.2 kilos, which is some 36.7 lbs. Remember, those were the days of a zillion versions of the same model, one for each specific market almost. The above figure is for my own (European) version on my own scales.
Inside, there is nothing else but a rather big transformer, two decent sized heat sinks and the two meters, plus two larger and two smaller PCBs. Since the case is made of commercial thickness pressed steel, where do you think all that weight comes from?
Now it weighs a bit more because I have bigger caps, two instead of one, but I never bothered to measure it after their installation.
So - what's your point?
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And, as you may have noticed, I am not arguing with anybody. I simply stated a fact, strictly limited to me and me alone, which was fortunately for me picked up by people who know much more than I do, so I had a chance to learn something.
Any discussion and/or disagreement you may have is not with me.
As for Siemens, all I can say is that I will gladly continue to buy their semicondutors as I have done for the last 35 years or so, as I find them to be very reliable.
Certainly no disagreement with you. You stated a fact, pure and simple. And it mirrored exactly my experiences
As do I. If it ain't broke, don't fix it.
Bonsai: I realized our disconnect as I was jogging...
My experience is primarily military. My customers cannot afford to pay for all the devices to be packaged hermetically in an expensive ceramic package, and then tested to determine if the chip passes critical parameters across the guaranteed temperature range. Wafer level testing is a huge expense, and the commercial sector cannot afford that. Unfortunately, a military hybrid which contains 4 to 10 mil spec chips inside cannot afford to be populated with chips which may not meet the full temp range.
In addition, many of the parts I've tested over the years were bleeding edge, where the process is never fully developed and yet the military wanted them. Mature products do not suffer such issues as the learning curve has been passed. I remember the days of the first silicon on sapphire fets, 12 bit ADC chips..and the first 6 inch wafer of 1N4148's.
edit: Now of course, my needs are no longer as loose as milspec. Use and operation in cryogens and radiation carries additional "problems".
jn
6 inch wafer ...?
Well, it was '84, before they started making big ones..
The funny thing was, the test system used a PDP-4 and a PDP-11 (IIRC), and the 16 bit counter for good dice came up with a negative quantity. (more than 32K good dice).
Had the operator scratching her head..
jn
On semiconductor reliability, what exactly do you guys refer to? I have BC5x0C and BC3x7C from both Fairchild and OnSemi that are matched to less than 1mV out of the box.
I also have a big question. There are companies like KEC and UTC that make their own transistor versions; some of these companies make good parts and others don't. I know H/K uses/used KEC. It would be nice to know which of these companies were reliable in producing decent parts.
I also have a big question. There are companies like KEC and UTC that make their own transistor versions; some of these companies make good parts and others don't. I know H/K uses/used KEC. It would be nice to know which of these companies were reliable in producing decent parts.
6 inch wafer ...?
Please gentlemen, wafers are metric. 450mm on the way!
Does size matter? Understanding Wafer Size
Reminding me of one of our funniest layout stories involving a layout engineer who thought rounding the conversion to 2.5 would make his job easier until we changed one layer on an old part.
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That's a parameter. Reliability is the ability to perform as per design without failure in the long run.
So what was the matter, couldn't the engineer just stretch the rubylith??
Sigh.. I hate metric...
I don't care how may billions of people use it..
Whoa. 450mm. So, the expanded wafer prior to pick and place, what, living room size??
And waffle packs the size of....waffles??
Did you make use of that resistor?
jn
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Funny, Scott!
In the 80's I made/sold semi ATE, a lot of which went to the soviet world. They had copied many western chips (uA741, DTL, TTL etc) which meant our test progs and jigs were a drop-in.
However, some commissar had decided that 0.1" pitch was just too bourgeois, so they standardized on 2.5mm.
An 8 leg 2.5 DIP would fit into a standard ZIF socket, just. But a 28pin ....?
Great problems and egg on faces everywhere!
In the 80's I made/sold semi ATE, a lot of which went to the soviet world. They had copied many western chips (uA741, DTL, TTL etc) which meant our test progs and jigs were a drop-in.
However, some commissar had decided that 0.1" pitch was just too bourgeois, so they standardized on 2.5mm.
An 8 leg 2.5 DIP would fit into a standard ZIF socket, just. But a 28pin ....?
Great problems and egg on faces everywhere!
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