Approve the Cookies
This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies. Read More.
OK
Index  •   • New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear  •   • Reviews
Guest
New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear  •   • Reviews
Register to forums    Log in

 
FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 08 Jan 2018 (Monday) 12:40
Search threadPrev/next
sponsored links
(this ad will go away when you log in as a registered member)

What Prime would you suggest?

 
BigAl007
Cream of the Crop
7,619 posts
Gallery: 511 photos
Best ofs: 1
Likes: 1412
Joined Dec 2010
Location: Repps cum Bastwick, Gt Yarmouth, Norfolk, UK.
     
Jan 12, 2018 10:52 |  #16

As a former RAF radar technician the number of unexplained it got better on it's own situations was considerable. I think possibly one of the best lines I ever wrote on a job card was this: "-50V line taken to earth via load, fault cleared." the radar used -50V post office relays for all of it's control logic. Since this had to be able to energise quite a number of relay coils it was also capable of sourcing quite high current. The load that was used to short it to earth was ME:eek::eek:. Ours was the second shift with two techs on each shift working on it. Total time to fix the fault was 18 hrs, so a total of 36 manhours. No we never found out what was wrong. Getting bit by the electricity is quite easy at 03:00. As I recall it was quite painful that time, a good combination of voltage and available current.

Working on late 50's and early 60's based tech, in the 80's you kind of got used to being bitten by electricity on a semi regular basis. At least nobody ever was got by the 180000 Volt, 120 Amp pulse that drove the radar transmitter output valve.

So nothing surprises me anymore when it comes to faults coming and going randomly.

Alan


My Flickr (external link)
My new Aviation images blog site (external link)

  
  LOG IN TO REPLY
sponsored links
(this ad will go away when you log in as a registered member)

2,743 views & 2 likes for this thread
What Prime would you suggest?
FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
AAA
x 1600
y 1600

Jump to forum...   •  Rules   •  Index   •  New posts   •  RTAT   •  'Best of'   •  Gallery   •  Gear   •  Reviews   •  Member list   •  Polls   •  Image rules   •  Search   •  Password reset

Not a member yet?
Registered members may log in to forums and access all the features: full search, image upload, follow forums, own gear list and ratings, likes, more forums, private messaging, thread follow, notifications, own gallery, all settings, view hosted photos, own reviews, see more and do more... and all is free. Don't be a stranger - register now and start posting!


COOKIES DISCLAIMER: This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies and to our privacy policy.
Privacy policy and cookie usage info.


POWERED BY AMASS forum software 2.0forum software
version 2.0 /
code and design
by Pekka Saarinen ©
for photography-on-the.net

Latest registered member is insurfr
691 guests, 334 members online
Simultaneous users record so far is 6430, that happened on Dec 03, 2017

Photography-on-the.net Digital Photography Forums is the website for photographers and all who love great photos, camera and post processing techniques, gear talk, discussion and sharing. Professionals, hobbyists, newbies and those who don't even own a camera -- all are welcome regardless of skill, favourite brand, gear, gender or age. Registering and usage is free.