Call Search
     

New to Ham Radio?
My Profile

Community
Articles
Forums
News
Reviews
Friends Remembered
Strays
Survey Question

Operating
Contesting
DX Cluster Spots
Propagation

Resources
Calendar
Classifieds
Ham Exams
Ham Links
List Archives
News Articles
Product Reviews
QSL Managers

Site Info
eHam Help (FAQ)
Support the site
The eHam Team
Advertising Info
Vision Statement
About eHam.net

   Home   Help Search  
Pages: [1]   Go Down
  Print  
Author Topic: Tektronix oscilloscope repair question  (Read 1189 times)
PROCYON
Member

Posts: 1




Ignore
« on: August 29, 2001, 01:07:00 PM »

Picked up a Tektronix 2465 300Mhz oscilloscope at an auction which is dead as the proverbial doornail...no noise, lights, nothing....good fuse, good power....assume a power supply problem. Anyone know likely culprits to look for (when I figure out how to open the *$%#$#@ case) ?
Logged
WB2WIK
Member

Posts: 20595




Ignore
« Reply #1 on: August 29, 2001, 04:37:10 PM »

I'm not familiar with the 2465 specifically; however I do own Tek scopes and always buy the service manuals...they are absolutely excellent.

You might try the Tek support on line <http://www.tektronix.com> to determine if the service manual for the 2465 is still available...I own a model 465, don't know if that bears any resemblance or not, but its manual is like an encyclopedia!

73 de Steve WB2WIK/6

Logged
Guest

« Reply #2 on: August 29, 2001, 10:53:44 PM »

Hi,

Try the links below for more info !

http://www.reprise.com/host/tektronix/home/

http://margo.student.utwente.nl/~wel/tek.htm

73 clay
Logged
AC5UP
Member

Posts: 3866




Ignore
« Reply #3 on: August 30, 2001, 12:43:13 AM »

I have a Tek 475A that had me stumped for the better part of a day with a power supply problem. Same symptoms as yours, the only thing that lit up was the incandescent lamps in the graticule and range indicators. The +150 volt regulator had about 135 volts on the input side where 190 was listed on the schematic. Couldn't find any reason for it as the transformer and rectifiers checked OK.

The electrolytic cap in that section was open. Not just soft, it was open. No voltage rise in the filter. The 'scope worked much better after I replaced it. Tektronix usually establishes one regulated voltage that references the other regulators and if it shuts down, they all go down. Once you understand this makes for a 'scope that either works correctly or not at all, it makes sense.

Good Hunting.
Logged

Never change a password on a Friday                
Pages: [1]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.11 | SMF © 2006-2009, Simple Machines LLC Valid XHTML 1.0! Valid CSS!