Re: Re: radar history Going though my father's Army papers there is a Certificate  for  his attendance  at SCR 268 School!

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

Re: radar history

> 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

Re: EF50 was Re: radar history

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

Re: EF50 was Re: radar history

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

Re: EF50 was Re: radar history

> 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

Re: EF50 was Re: radar history

:> 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

Re: radar history

> 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

Re: radar history

> 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

Re: radar history

> 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

Re: radar history

> 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

Re: Re: Re: Re: radar history

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,

Re: EF50 was Re: radar history

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

Re: EF50 was Re: radar history

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:

Re: EF50 was Re: radar history

.. 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

EF50 was Re: radar history

E = 6.3v filament F = Pentode 5x = B9G base Andy

Re: Re: Re: radar history

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

RE: Re: Re: radar history

> > 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

Re: Re: Re: radar history

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  

Re: Re: radar history

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

Re: Re: radar history

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

Re: radar history

> 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

Re: radar history

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

Re: radar history

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

Re: radar history

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

Re: radar history

> 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

Re: radar history

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

Re: radar history

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

RE: radar history

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

Re: radar history

^^ 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

Re: radar history

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

Re: radar history

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...

Re: radar history

All I have to say in response to this message is... http://i0.kym-cdn.com/entries/icons/original/000/022/978/yNlQWRM.jpg