proximity fuze tubes

I was just reading the other day that Klaus Fuchs, who passed atomic bomb secrets to the Soviets, passed all the secrets to the fuze too. And here the APL program manager was so amazed the project was never compromised. Also interesting is that one of the only two American civilians to be executed for espionage-related activity during the Cold War was an EE- too much.

Phil Allison said that was impossible!

I had some early "lab" models from Western Electric.

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Virg Wall

Is that powered by a ram air turbine of some sort?

The 2E27 looks like it's the bandpass filter, but it's a decade before Sallen & Key. I think it's being used like an op amp with only an inverting input, and a twin-T network in the feedback loop perhaps?

Is that powered by a ram air turbine of some sort?

The 2E27 looks like it's the bandpass filter, but it's a decade before Sallen & Key. I think it's being used like an op amp with only an inverting input, and a twin-T network in the feedback loop perhaps?

All those poor tubes, blown to pieces... :[

"Bitrex"

** Nope.

By a special battery inside the fuse " created " while accelerating out of the gun barrel. A glass vile containing electrolyte shatters, wets the cells and the battery is hot to go.

Staggering to think that if these relatively simple gadgets had been widely available earlier in WW2, the devastating bombings of London, Berlin and Tokyo etc may never have happened.

... Phil

On a sunny day (Fri, 04 Nov 2011 20:40:13 -0700) it happened John Larkin wrote in :

Would not a MOSFET work better?

Some did that and some used a propeller-driven AC generator, like in the schematic I posted.

Using conventional AA shells, over London, it took about 3000 shells to take down a German bomber. With prox fuzes, it dropped to something like 200. A lot of Patton's success in storming across France and into Germany was due to proximity shells: one howitzer shrapnel shell exploding 20 feet above the grould would kill everything for a hundred yards or so in all directions... nowhere to hide. Prox shells stopped the kamakazies, too.

John

I wonder how a boatload of 2N7000s would have affected the war.

John

On a sunny day (Sat, 05 Nov 2011 08:12:38 -0700) it happened John Larkin wrote in :

I dunno. Much of Europe was freed by the Russians, with rather simple weapons, but a lot of manpower. The Russians had great tanks it seems.

I was thinking this morning if you used a microwave beam pointed in the direction of the artillery, if these things would detonate prematurely in the air.. With MOSFETS they perhaps would not detonate at all anymore. Or a radio frequency beam at the right frequency. Also fun to think of counter measures, and then counter-counter measures.

You have a weird idea of what constitutes "freedom".

Yes, and a few million tons of stuff from the US, not to mention help with the second and third fronts.

direction

There is a reason for secrecy.

Spy vs. Spy.

direction

With modern technology, it would be easy to detect an incoming CW/doppler prox fuze and transmit something that would detonate it. I assume that modern prox weapons have fancy encrypted spread-spectrum stuff that makes it harder to spoof.

John

Hi John,

How long at these tubes?

John Larkin a écrit :

With those you can do TTL (tiny tubes logic)

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Thanks,
Fred.

Or, on the other hand, how much worse it would have been if His Illustrious Fürherness and his illustrious friends hadn't thought that the idea of a radio proximity fuse was stupid, and had let his people continue working on it after 1940.

--
www.wescottdesign.com

Hey -- I've got a drawer full of those. (Courtesy of an uncle who used to work on missiles). I don't know if they're actually types that were used in proximity fuses, but they sure have that look.

--
www.wescottdesign.com

On a sunny day (Sat, 05 Nov 2011 10:46:38 -0500) it happened " snipped-for-privacy@att.bizzzzzzzzzzzz" wrote in :

There is very little difference, look at your own country, where the 'occupy' protesters get tear-gassed, beaten, I could write: ... CNN on US US presses for a resolution to stop violence against the Occupy Wallstreet group. CNN: Occupy Wallstreet is now recognised as the true US government by Cuba, Russia, China, and Venezuela. CNN: More violence today against Occupy Wallstreet unarmed peaceful protesters. CNN: Security council to vote on armed support for US Occupy protesters. CNN: France and other NATO countries send weapons as the Occupy movement gains strength in America. CNN: More and more countries recognise the Occupy Wallstreet movement as the new US government. CNN: General Mc Glassifier changes over to the Occupy movement, CNN: Pentagon joins the US Occupy Wallstreet movement, army does not take action against protesters, CNN: Occupy Wallstreet now controls most of Washington, CNN: Airforce one seen leaving, has Barak fled the country? CNN: Kenia to promise political asylum for the Obama family. CNN: Where is Obama? Occupy protesters storm the white house. Cnn:

See, this is the anti-Ghadaffy jive your media have been putting out for the last few month, but now with your current presidente as target, You are just being guided like the sheep, there is mostly mere apathy and you follow to the slaughter house. You are made to think you are free, but you are just a pawn in the game of the big capital.

To take it to Russia, maybe then you understand my affection that way, if it was not for the Russians I probably would not even be here. So I own them some thankfulness, those who fought for my life so to speak.

Always, in any country there are those who will never be happy with what is, and indeed 'systems' are to serve the people, and not so much people to serve the system. With such a broad statement however there are some important nuances. In a very large population, if you look at the animal kingdom, say ants, or bees, individuals have certain tasks. It all serves the survival of the group, the species. These structures are needed FOR that survival, and so freedom as in the sense of chaos, or anarchy, cannot last very long, if all the individuals need to be fed and cared for, structures are needed. The structures in China (call it communism if you like) and Russia are basically a bit different than those in the US of A. They serve however the same purpose, and in that sense there is just as much freedom there as is your place, and that freedom can persist as long as the system is not de-stabilised by some factor. It is so silly to boast about your own system and look down upon others if you, as a little ball played by your own media do not even have a clue what freedom actually is. Freedom, is an experience in the human mind, a state of mind. You can feel incredibly free even in prison, and you can be totally mentally wrecked as the head of the state with all the powers in the world, all the material wealth that exists made available to you, and feel like being a prisoner of your job (Obama). So, in the human heart. and without that human heart there is no reason to live, as there is no enjoyment possible. So, all these systems, whatever they are, have happy and unhappy people in them. This unhappiness is then sometimes blamed on that system, that leads to protests, the system reacts, it wants to stabilise itself, and more protest, and all it takes is a few dirty CIA operatives to destabilise a system and cause massive bloodshed. US divide and rule, Obama's game in the middle east, and then the bastard blames it on NATO, and plays the good guy giving medical support and other support to those same anarchist he helped to overthrow a reasonable functioning country (system). For what? Because he is a moron, and creating more enemies every day, and because of his stupidity bringing ANY idea of freedom associated with your United little aggressive heap of states down into the gutter of distasteful shit.

So, I am not a Putin fan, or something like that, but I respect the people of Russia and their leaders, they are not doing so bad, and personally I think the freedom there in the sense of being able to LIVE and follow your heart is perhaps just as good if not better than in your disgraceful country. OK so much for the cold war revival -)

direction

You're fookin' loony. Only a Europeon moron (or an Obamanite) could come up with that much BS in one sitting.

There were some similar looking tubes that were used in portable radios, with 22.5 to 90 volt B+ batteries. What are the part numbers on yours?

John

"John Larkin" "Phil Allison"

** I see the one in your post is mortar round - not a AA shell.

I guess their sub sonic speed allowed the use of a prop.

** By the time VT fuses were in use, German bombers were no longer attacking London.

At least, not ones with crews in them.

... Phil