[ARC5] Radar

[Tom Aschenbrenner]

John,

I received the below from a friend that monitors the arc5 list. He knew I
did the WWII radar
restoration aboard the submarine USS COBIA. As far as we know the boats SJ-1
surface
search unit, that is now in full operation just as it was during the 7 war
patrols that the boat
went on, is the worlds oldest operating radar. There are units that have
older parts but none
(as far as I know) are in full operation. It was a real delight doing the
work. It took about
6 months of restoration according the museum rules, which mean that the unit
can't have
any of its design changed...I could use newer parts like caps, resistors,
etc. I agree with
one the of the below comments:  after you really get into the design of some
of the radar
circuits you find that the guys that did the original work were
really,really,really smart.

If you know of any SJ parts let me know: we are always looking for spares.
See
http://usscobia.com for operating pictures as well as a needed tube list.

Regards,

Tom Aschenbrenner
WA9EXS



-----Original Message-----
From: arc5-bounces at mailman.qth.net [mailto:arc5-bounces at mailman.qth.net]On
Behalf Of J. Forster
Sent: Saturday, April 11, 2009 6:51 PM
To: kgordon2006 at verizon.net
Cc: arc5 at mailman.qth.net; J. Forster
Subject: Re: [ARC5] T-19


I've long (>45 years> been interested in radars and have a very modest
collection. I've tried to collect complete systems, BTW.

But most is lost or soon will be lost, which is very sad.  If you are
interested in preserving some of the things, please drop me a note, off
line.

-John




> On 11 Apr 2009 at 10:53, J. Forster wrote:
>
>> It is ironic IMO that the only systems that have survived are those
>> that were used as parts mules or "converted" to ham use. Much of the
>> really advanced systems were crushed for scrap, etc.
>
> Sigh...I feel the same way.
>
> Radar, for instance.
>
> Practically everything connected with that was so ingenious
> it amazes me every time I find out something new about it.
>
> Ken W7EKB


______________________________________________________________
ARC5 mailing list
Home: http://mailman.qth.net/mailman/listinfo/arc5
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:ARC5 at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
No virus found in this incoming message.
Checked by AVG - www.avg.com
Version: 8.0.238 / Virus Database: 270.11.51/2052 - Release Date: 04/11/09
10:51:00