1973 military oscilloscope porn - Page 1
Forum section: electronics / general

author: kallisti5
author_rank: Contributor
timestamp: January 15, 2013, 12:37:18 am
content: I took this picture to record some component info... it ended up pretty pornographic. They don't build'em like they used to!

author: FenderBender
author_rank: Super Contributor
timestamp: January 15, 2013, 01:22:59 am
content: Wasn't even alive when this was manufacturered but goddamn I love well built vintage equipment. Awesome.What scope? HP 17--?

author: GeoffS
author_rank: Unknown
timestamp: January 15, 2013, 01:38:21 am
content: Reminds me of when I did my electronics training (RAAFearly 1970s)While there was lots of HP test equipment, all the oscilloscopes were Tektronix. Enormous beasts on trolleys, took two strong men to lift them onto a bench.

author: Stephenniall
author_rank: Contributor
timestamp: January 15, 2013, 01:57:00 am
content: I love military equipment ! Its all built to the highest of standards.

author: Skimask
author_rank: Super Contributor
timestamp: January 15, 2013, 03:57:17 am
content: Ugh! Look at all those 90 degree corners on the traces!How did they get these things to work at all at higher freq's?

author: kallisti5
author_rank: Contributor
timestamp: January 15, 2013, 05:01:14 am
content: Quote from: Skimask on January 15, 2013, 03:57:17 amKeep in mind she's from the 70's and only goes up to 75 MHz.The thing also has a *large* number of rf chokes scattered around which may helpAs the thing is full military (air tight metal enclosure, etc), maybe durability and repair-ability were higher priorities?

author: Skimask
author_rank: Super Contributor
timestamp: January 15, 2013, 05:04:31 am
content: Even then, I would still think all those sharp corners would create a large number of potential stress points vs having nice rounded corners.

author: SeanB
author_rank: Super Contributor
timestamp: January 15, 2013, 05:07:18 am
content: Yes, repairable if it fails and design for no failure were a very big driver. Cost was not such an issue.

author: smashedProton
author_rank: Frequent Contributor
timestamp: January 15, 2013, 05:40:50 am
content: Has anyone else noticed that power supplies, av recievers, tv boards, and test equipment are all routed using different styles? The voltage capability at parts is more or less the same, but they are routed differently. very curious

author: kallisti5
author_rank: Contributor
timestamp: January 15, 2013, 05:57:25 am
content: Quote from: FenderBender on January 15, 2013, 01:22:59 amIt was this one:https://www.eevblog.com/forum/chat/us-mil-spec-scope-based-on-hp1707b/

author: jahonen
author_rank: Super Contributor
timestamp: January 15, 2013, 08:19:30 am
content: Quote from: Skimask on January 15, 2013, 05:04:31 amMore like cosmetic "issue" than a real problem. Absolutely no problem for frequencies in that scope:http://www.sigcon.com/Pubs/edn/bigbadbend.htmRegards,Janne

author: Skimask
author_rank: Super Contributor
timestamp: January 15, 2013, 08:27:41 am
content: Quote from: jahonen on January 15, 2013, 08:19:30 amGood article. Lots of good points. I never thought electrons would "fly off into space", but I guess I was more concerned with the whole reflection thing.The part that changed my mind was--"Your average electron smacks into something and changes directions billions of times in a length of 10 mils. Electrons don't have any trouble banging around a corner."Never thought of it that way.

author: Galenbo
author_rank: Super Contributor
timestamp: January 15, 2013, 10:33:07 am
content: I see BAD SOLDERING on the right big capacitor.A shame...

author: SeanB
author_rank: Super Contributor
timestamp: January 15, 2013, 03:19:19 pm
content: Would not call it bad, just not enough at the top of the board. Must be plenty underneath, as it has held this big cap for decades.

author: Jope
author_rank: Regular Contributor
timestamp: January 15, 2013, 04:23:47 pm
content: Quote from: Skimask on January 15, 2013, 08:27:41 amThe author, Howard Johnson, was guest on theAmp Hour #77.