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 Ha

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 for

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 men

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 qu

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 http://www.ma

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 i

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 maggIes,fr

C&K paddle switches on sale

In case anyone is making a scaled-down front switch panel: http://www.goldmine-elec-products.com/prodinfo.asp?number=G22319 =] -- Anders Nelson +1 (517) 775-6129 www.erogear.com

RE: C&K paddle switches on sale

Van: Anders Nelson via cctalk Verzonden: zaterdag 3 maart 2018 18:24 Aan: General Discussion: On-Topic and Off-Topic Posts Onderwerp: C&K paddle switches on sale In case anyone is making a scaled-down front switch panel: http://www.gol

Re: Suggestions for 16 mm movies to digital conversion

GoMemorable got back to me. They'll still scan for me to QT ProRes on hard drive for 20 cents a foot for 8mm/Super 8 and 30 cents a foot for 16mm. - John

Re: C&K paddle switches on sale

they would be difficult to use unless you made a board with extra-big holes since they aren't PC mount On 3/3/18 9:24 AM, Anders Nelson via cctalk wrote: > In case anyone is making a scaled-down front switch panel: > > http://www.goldmine-elec-products.com/prodinfo.asp?number=G22319

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 i

RX01/RX8/RX11 user's manual for trade

Hi all, I have an extra "RX8/RX11 floopy disk system user's manual" I'd like to trade off for something I'd find useful (anything PDP-11 which I don't already have, preferably). Anyone? Noel

FTGH: Unknown extender card

Hi, I'm not sure what kind of system this extender card: http://ana-3.lcs.mit.edu/~jnc/tech/jpg/tmp/SmallExtender.jpg is for, but if anyone has a use for it, FTGH. It has 2x43=86 contacts. Noel

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 floa

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 cct

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   secti

Re: FTGH: Unknown extender card

reminds me of S100 bus or some alternaive bus at that time, but memory is foggy. bob On Sat, Mar 3, 2018 at 5:48 PM, Noel Chiappa via cctalk wrote: > Hi, I'm not sure what kind of system this extender card: > > http://ana-3.lcs.mit.edu/~jnc/tech/jpg/tmp/SmallExtender.jpg > > is for, but if any

Re: RX01/RX8/RX11 user's manual for trade

where are you located? US or Oconus? bob On Sat, Mar 3, 2018 at 4:31 PM, Noel Chiappa via cctalk wrote: > Hi all, I have an extra "RX8/RX11 floopy disk system user's manual" I'd like > to trade off for something I'd find useful (anything PDP-11 which I don't > already have, preferably). Anyone?

Re: FTGH: Unknown extender card

> From: Bob Smith > reminds me of S100 bus That was my first thought, until I counted the pins... Noel

Re: FTGH: Unknown extender card

On 03/03/2018 04:48 PM, Noel Chiappa via cctalk wrote: Hi, I'm not sure what kind of system this extender card: http://ana-3.lcs.mit.edu/~jnc/tech/jpg/tmp/SmallExtender.jpg is for, but if anyone has a use for it, FTGH. It has 2x43=86 contacts. Noel 43 is a rather unusual pin count.

Re: FTGH: Unknown extender card

I have a CPU board with similar format that I bought thinking I'd eventually figure it out. Same boat, though, I haven't run across the system it goes with. It does look very similar to many S-100 designs, though. On Sat, Mar 3, 2018 at 9:39 PM, Jon Elson via cctalk wrote: > On 03/03/2018 04:48