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Old 16th March 2012, 04:37 AM   #21401
FrankWW is offline FrankWW  Canada
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Quote:
Originally Posted by bcarso View Post
How wonderful! Do we know the dramatis personae?
Johnny Wayne, Frank Schuster and Sylvia Lennick

50 years since she said, 'Julie, don't go!' - thestar.com

Wayne and Shuster - Wikipedia, the free encyclopedia
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Old 16th March 2012, 04:42 AM   #21402
bcarso is offline bcarso  United States
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Excellent! Thank you. I must have seen that the first time it was on network TV. A long time ago, indeed.

Clearly, it made an inedible impression on my young mind.
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Old 16th March 2012, 04:50 AM   #21403
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Everyone, could we go back to audio design? I realize that some don't think it very useful or important, but it is the reason for the length and attendance on this thread.
In my world, today, I have several assignments:
One is to replace 2SK389's with 2SK170's or LSK 170's. This requires some sort of matching scheme to get good offsets, that is a 'piece of cake'.
The next is to troubleshoot a serious phono stage design with about 50 jfets per channel, sorry I can't get into detail about that.
Third, is to design an op amp containing headphone amp of high quality. We can talk about that, and WHY I did it the way I did.
Any questions?
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Old 16th March 2012, 07:26 AM   #21404
PMA is offline PMA  Europe
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Originally Posted by simon7000 View Post
Actually Ramona caused a bit of a stir when it was first tested. It seems the transmitter bounced off the Ionosphere and was picked up on all sorts of gear in the U.S. leading folks to wonder if it was some sort of deliberate jamming or electronic warfare!
It was completely passive system, with no transmitter. There is some description in

http://www.raf.mod.uk/rafcms/mediafi...86AD92DC17.pdf

article "Silent Trackers: The Spectre of Passive Surveillance in the Information Age"
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Old 16th March 2012, 09:35 AM   #21405
Bonsai is offline Bonsai  Taiwan
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"Third, is to design an op amp containing headphone amp of high quality. We can talk about that, and WHY I did it the way I did"

I'd just come clean and say if you are after top quality its really a no brainer.
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Old 16th March 2012, 11:40 AM   #21406
DF96 is offline DF96  England
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I remember the surprise when the Serbs shot down a US stealth bomber. At the time it was said that they were using passive radar based on broadcast transmitters. A stealth bomber may be 'invisible', but it is still opaque.

Underestimating your enemy seems to be a standard military tactic. Are people taught to think in straight lines at staff college, or is it that the armed forces only recruit unimaginative people?
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Old 16th March 2012, 12:13 PM   #21407
PMA is offline PMA  Europe
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Originally Posted by DF96 View Post

Underestimating your enemy seems to be a standard military tactic.
Not only military tactic - this thread is a real proof. I would not speak about 'enemy' in this thread, but actually underestimating of potential competition or of different design approach is a standard tactic here, rather than open unprejudiced discussion. And for this reason it lost any attractiveness regarding audio design.
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Old 16th March 2012, 12:15 PM   #21408
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Originally Posted by john curl View Post
The next is to troubleshoot a serious phono stage design with about 50 jfets per channel, sorry I can't get into detail about that.
Third, is to design an op amp containing headphone amp of high quality. We can talk about that, and WHY I did it the way I did.
Any questions?
Do you plan to make phono stage integrated with high quality headamp?
That would be new, a system including no digits, only vinyl and high-quality low-wattage analog schematics.
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Old 16th March 2012, 02:19 PM   #21409
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I have been making phono preamps for the last few years. However, I can only talk in general about the designs, because they are not even released yet.
I feel a little differently about the headphone design, because it is a Honda and not a Porsche.
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Old 16th March 2012, 02:36 PM   #21410
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Originally Posted by PMA View Post
It was completely passive system, with no transmitter. There is some description in

http://www.raf.mod.uk/rafcms/mediafi...86AD92DC17.pdf

article "Silent Trackers: The Spectre of Passive Surveillance in the Information Age"
Apparently either during development they used a simulation of US AWACS or there was some other source. At the time it was called in the U.S. "Mocking Bird" and thought to Soviet over the horizon radar.
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