Going though my father's Army papers there is a Certificate for his
attendance at SCR 268 School!
Never though I would have some family history to put with some of the scraps
I have 268 stuff here. My dad was like some of the others if it was
classified when he was in the
> From: Steven Malikoff
> I also have a book 'RADAR How it all began' by Jim Brown ...
> incredibly precise recollection of the engineering
Wow, thanks for that incredibly valuable pointer. My copy just arrived, and
it's fabulous; it documents in great detail a part of the story
On Mon, 5 Mar 2018, Christian Corti wrote:
The EF50 has a Loctal base with eight pins. 5xx is Magnoval. 8x is Noval.
Correction: Loctal with nine pins ;-) How crazy...
Christian
On Sun, 4 Mar 2018, Nico de Jong wrote:
E = 6.3v filament
F = Pentode
5x = B9G base
.. also known as Noval base
No, absolutely not ;-)
The EF50 has a Loctal base with eight pins. 5xx is Magnoval. 8x is Noval.
Christian
> From: William Donzelli
> Germany often gets the short end of the stick when it come to radar
> tech in World War 2
For those who are interested in German radar, there's a good book:
David Pritchard, "The Radar War: Germany's Pioneering Achievement
1904-45", 1989
which
:> The high frequency power tubes were required for better spacial
resolution. My understanding was that major difference between the
German radar and allied was that the Germans had a single trace, like
a time domain reflectometer. The allies had a rotating image that is
similar to what we see on
> The one described in the RH is a "split anode magnetron". The note on
> it says that "frequency stability is not very good:.
Yes, but in World War 2 (and a little into the 1950s), split anode
magnetrons were used in ECM "jammer" transmitters.
> It's my understanding that the allies used the
> A very interesting story in this radar history is how the Dutch managed to
> rescue the EF50 tube, essential for these early radar receivers, to England
> just hours before the Germans invaded holland.
This is generally a good article, but has a major flaw or two.
One, it describes acorn tubes
> 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
> I dunno about these historical accounts.
Radar tech history is a real minefield, and my advice is to take any
historical accounts or studies that are older than ten or fifteen
years old with a grain of salt. Often a big grain.
"History is written by the victors" had been very strong with radar
that is precious!
Ed#
In a message dated 3/4/2018 7:05:35 AM US Mountain Standard Time, d...@db.net
writes:
On Sun, Mar 04, 2018 at 12:45:10PM -, Dave Wade via cctalk wrote:
> >
> > A very interesting story in this radar history is how the Dutch managed to
> > rescue the EF50 tube,
oun...@classiccmp.org> on behalf of Nico de Jong via
cctalk <cctalk@classiccmp.org>
Sent: Sunday, March 4, 2018 7:23:13 AM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: EF50 was Re: radar history
Oh sh..l., It was a bit too quick
Apologies...
/Nico
- Original Message -
From: &q
Oh sh..l., It was a bit too quick
Apologies...
/Nico
- Original Message -
From: "ANDY HOLT via cctalk" <cctalk@classiccmp.org>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk@classiccmp.org>
Sent: Sunday, March 04, 2018 3:52 PM
Subject:
.. also known as Noval base
/Nico
- Original Message -
From: "ANDY HOLT via cctalk" <cctalk@classiccmp.org>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk@classiccmp.org>
Sent: Sunday, March 04, 2018 3:52 PM
Subject: EF50 was Re: radar
E = 6.3v filament
F = Pentode
5x = B9G base
Andy
On Sun, Mar 04, 2018 at 12:45:10PM -, Dave Wade via cctalk wrote:
> >
> > A very interesting story in this radar history is how the Dutch managed to
> > rescue the EF50 tube, essential for these early radar receivers, to England
> > just hours before the Germans invaded holland.
I heard this
>
> A very interesting story in this radar history is how the Dutch managed to
> rescue the EF50 tube, essential for these early radar receivers, to England
> just hours before the Germans invaded holland.
>
> Read here ( not my site ):
>
> http://www.dos4ever.com/EF50/EF50.html#war
>
> Jos
I mean TUBE not tune!
These look like red tune in ww2 lend lease talk radio that has a vhf
section? Ed#
In a message dated 3/3/2018 4:02:34 PM US Mountain Standard Time,
cctalk@classiccmp.org writes:
These look like red tune in ww2 lend lease talk radio that has a vhf
These look like red tune in ww2 lend lease talk radio that has a vhf
section? Ed#
In a message dated 3/3/2018 3:28:48 AM US Mountain Standard Time,
cctalk@classiccmp.org writes:
On 03.03.2018 09:35, Paul Birkel via cctalk wrote:
> On Sat, Mar 3, 2018 at 12:46 AM, Chuck Guzis via
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
> From: Jon Elson
> if they did air raids over France or Germany, that eventually a plane
> with one would get shot down and a magnetron would be obtained in
> relatively good shape. So, likely by 1942 it was considered to no
> longer be a secret.
One was lost near Rotterdam
On 03/03/2018 12:58 AM, Ed Sharpe via cctalk wrote:
> OK or may have been a magnetron... but not a cavity magnetron I
> gave a 30s radio news as I remember had magnetron.. but not cavity
> one.. I was confused by it at the time, but someone older explained
> it to me OK see some
On 03/03/2018 12:46 AM, Chuck Guzis via cctalk wrote:
I dunno about these historical accounts.
I was watching a PBS program about RADAR and the magnetron was made out
to be a super-secret device, yet there's a clear explanation of it in my
1942 "Radio Handbook".
I think the British considered
OK or may have been a magnetron... but not a cavity magnetron I gave a 30s
radio news as I remember had magnetron.. but not cavity one.. I was confused
by it at the time, but someone older explained it to me OK see some
maggIes,from 32... but notch SECRET CAVITY MAGNETRON
> 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
Chuck reckoned
> I dunno about these historical accounts.
> I was watching a PBS program about RADAR and the magnetron was made out
> to be a super-secret device, yet there's a clear explanation of it in my
> 1942 "Radio Handbook".
Yeah I know this off-topic, but what the heck.
The Buderi book
On 03.03.2018 09:35, Paul Birkel via cctalk wrote:
On Sat, Mar 3, 2018 at 12:46 AM, Chuck Guzis via cctalk <
cctalk@classiccmp.org> wrote:
I dunno about these historical accounts.
A very interesting story in this radar history is how the Dutch managed to
rescue the EF50 tube, essential
On Sat, Mar 3, 2018 at 12:46 AM, Chuck Guzis via cctalk <
cctalk@classiccmp.org> wrote:
> I dunno about these historical accounts.
>
> I was watching a PBS program about RADAR and the magnetron was made out
> to be a super-secret device, yet there's a clear explanation of it in my
> 1942 "Radio
^^ thats because they create lure around things to install fear in the
enemy remember propiganda
On Sat, Mar 3, 2018 at 12:46 AM, Chuck Guzis via cctalk <
cctalk@classiccmp.org> wrote:
> I dunno about these historical accounts.
>
> I was watching a PBS program about RADAR and the magnetron was
I dunno about these historical accounts.
I was watching a PBS program about RADAR and the magnetron was made out
to be a super-secret device, yet there's a clear explanation of it in my
1942 "Radio Handbook".
--Chuck
dunno what that thing is..
Mentioned link as many of us,are,interested in a,cross section on electronivs
history.. pike Cory, and others ..
Sent from AOL Mobile Mail
On Friday, March 2, 2018 Ian Finder wrote:
All I have to say in response to this message is...
All I have to say in response to this message is...
http://i0.kym-cdn.com/entries/icons/original/000/022/978/yNlQWRM.jpg
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