[time-nuts] RADAR

[J. Forster]

Correxct, I believe.

There is a little known story about the cavity magnetron:

The one Tizzard brought over was machined out of a solid block of copper.
Copper is a horror to machine....  kinda like cheese. A machinist was
lucky to get any yield.

It was brought to the Raytheon labs and Percy Spencer looked at it. The
next day he proposed to make them out of thin stampings, like the stator
of a DC moter, stacked up and furnace brazed. He also figured out a better
way to make the internal straps. The outcome was an easily produced
maggie, which also produced much higher power.

Best,

-John

================


> I believe the klystrons came from the Varian brothers in California, but
> England sent us their multi-cavity magnetrons via Tizzard.  Both were
> essential.  We gave them the duplexer.
>
> John  WA4WDL
>
> --------------------------------------------------
> From: "Lee Reynolds" <kd1sq at spamcop.net>
> Sent: Monday, December 20, 2010 6:54 PM
> To: <time-nuts at febo.com>
> Subject: [time-nuts] RADAR
>
>> Hm, I suspect, Rob, much though it might distress national pride, that
>> RADAR
>> a la WWII has probably to qualify as an Anglo American product.
>>
>> The Cousins did, after all, send us those nice klystrons they managed to
>> get
>> up and running. Would've been a bugger to do it without those.
>>
>> Mind you, there was quite a bit done by a number of countries in getting
>> the
>> idea, basic tech and proof of concept going before long before that.
>>
>> Do like those old HOME CHAIN towers you see spotted around here and
>> there,
>> though.
>>
>> Anyone else have anything to add to this?
>>
>>    Lee
>>
>> -----Original Message-----
>>
>> Date: Mon, 20 Dec 2010 21:51:15 -0000
>> From: "Rob Kimberley" <rk at timing-consultants.com>
>> Subject: Re: [time-nuts] Loran?
>> To: "'Discussion of precise time and frequency measurement'"
>> <time-nuts at febo.com>
>> Message-ID: <004801cba090$069dc9d0$13d95d70$@timing-consultants.com>
>> Content-Type: text/plain; charset="us-ascii"
>>
>> I there was me thinking that we invented RADAR......
>>
>> Rob (in UK) Kimberley
>> --------------------------
>>
>>
>> _______________________________________________
>> time-nuts mailing list -- time-nuts at febo.com
>> To unsubscribe, go to
>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> and follow the instructions there.
>>
>
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>
>