3 Mar
2018
3 Mar
'18
5:35 a.m.
From: Chuck Guzis
the magnetron was made out to be a super-secret
device, yet there's a
clear explanation of it in my 1942 "Radio Handbook".
Ordinary magnetrons had indeed been around for a while; they were invented in
1920. The British invention was the _cavity magnetron_, a quite different
beast; it was kind of a cross between a magnetron and a klystron, with the
best features of each.
Buderi (which is indeed an excellent history, perhaps the best in the radar
section of my library) has a good explanation of how it works.
Noel
3 Mar
3 Mar
2:59 p.m.
Noel - the MIT rad labs ?thick??volume on the Maggie ?is ?pretty??cool ?too..
We are blessed to have ?an entire set ( 28 volumes) at the museum of ? rad labs... ?I also
have a ?set myself... with ?used to be a lot more?special ?than now.... ? you can
download? ?them?in digital ?form and they float on cd ?too ?
?
We ?do have ?some ?volumes that ?may be ?extra at the museum library ?some things are
?just ?so nice on paper... this is one ?.... one of the others is a set of Bell System
Technical? Journals... ( will probably?have ?an ?extra ?set of those.. ?many many
boxes...
?
got coutermeasures ?I recommend ?the ?2 ?volume ?set ? from Harvard Radio Research?Labs ?
? ala ?RRL ? ( Terman ran it) ?
?
Salsbury, ?whose ?entire ?library is inside the museum library ?started at ? MIT Rad Las
as he ?came over ?rith ?EOL ?from Berkeley?and ?went ?over to Harvard?and ?was ?section
head on the 50,000 watt.. ?UHF ground jammer ? for Lichtenstein? ? Nazi? night
fighter?radar...
?
we have some radar ?gear and a lot ?of ? countermeasures ? gear...
?
?
In a message dated 3/3/2018 6:35:14 AM US Mountain Standard Time, cctalk at classiccmp.org
writes:
?
From: Chuck Guzis
the magnetron was made out to be a super-secret
device, yet there's a
clear explanation of it in my 1942 "Radio Handbook".
Ordinary magnetrons had indeed been around for a while; they were invented in
1920. The British invention was the _cavity magnetron_, a quite different
beast; it was kind of a cross between a magnetron and a klystron, with the
best features of each.
Buderi (which is indeed an excellent history, perhaps the best in the radar
section of my library) has a good explanation of how it works.
Noel
4 Mar
4 Mar
2:19 p.m.
Ordinary magnetrons had indeed been around for a
while; they were invented in
1920. The British invention was the _cavity magnetron_, a quite different
beast; it was kind of a cross between a magnetron and a klystron, with the
best features of each.
The cavity magnetron was invented by a lot of people (Soviet,
Japanese, German, Swiss, United States, and I think the Danish*), just
like radar itself. Most of these inventors fell to the wayside,
because the cavity magnetron just was not a useful device. Most of
these inventors tried to use the cavity magnetron as a CW oscillator,
and in that mode, they are basically awful tubes. Randall and Boot
("the British") invented the pulse operation of the cavity magnetron -
a way to basically abuse the tubes but get pulses magnitudes more
powerful than previously done. This, of course, was the key to
microwave radar.
* much of this original research was not secret, just ignored. RCA's
"split anode tank magnetron" was even completely described in one of
their tech journals.
--
Will
2:24 p.m.
heck ?and the split anode maggies made appearances?in ?radio news in the 30s!
?
yow ?do bring up a ?good ?point of ?things being?discovered but ?not ?revealed at the very
moment... have ?not studded?that about ?maggies ?but ? many other thing ?followed?that
crooked? path ? though...
?
Ed#
?
?
In a message dated 3/4/2018 3:19:50 PM US Mountain Standard Time, cctalk at classiccmp.org
writes:
?
Ordinary magnetrons had indeed been around for a
while; they were invented in
1920. The British invention was the _cavity magnetron_, a quite different
beast; it was kind of a cross between a magnetron and a klystron, with the
best features of each.
The cavity magnetron was invented by a lot of people (Soviet,
Japanese, German, Swiss, United States, and I think the Danish*), just
like radar itself. Most of these inventors fell to the wayside,
because the cavity magnetron just was not a useful device. Most of
these inventors tried to use the cavity magnetron as a CW oscillator,
and in that mode, they are basically awful tubes. Randall and Boot
("the British") invented the pulse operation of the cavity magnetron -
a way to basically abuse the tubes but get pulses magnitudes more
powerful than previously done. This, of course, was the key to
microwave radar.
* much of this original research was not secret, just ignored. RCA's
"split anode tank magnetron" was even completely described in one of
their tech journals.
--
Will
2485
days inactive
2486
days old
3 comments
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participants (3)
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couryhouse＠aol.com -
jnc＠mercury.lcs.mit.edu -
wdonzelli＠gmail.com