TEK 2440 rippled !!?! - Page 2 - diyAudio
Go Back   Home > Forums > Design & Build > Equipment & Tools

Equipment & Tools From test equipment to hand tools

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 16th January 2013, 03:07 PM   #11
diyAudio Member
 
Join Date: May 2011
Location: Quebec
No, it seems internal parasitic somehow leaking... Knowing that, and because I only use it for audio purpose, I just use it as is.

I'm not even certain that there's a problem with it as when I look at other DSO images, they never appear to be perfectly flatlined...

I adapted to it
  Reply With Quote
Old 16th January 2013, 04:29 PM   #12
gootee is offline gootee  United States
diyAudio Member
 
Join Date: Nov 2006
Location: Indiana
Blog Entries: 1
In case you're ever looking for something to do, you might want to look for any electrolytic caps and replace them, especially if they are near the digital-to-analog convertor section.

Last edited by gootee; 16th January 2013 at 04:31 PM.
  Reply With Quote
Old 16th January 2013, 04:38 PM   #13
tomchr is offline tomchr  United States
diyAudio Member
 
tomchr's Avatar
 
Join Date: Feb 2009
Location: Greater Seattle Area
I don't know the 2440 well enough. But a common problem with the 2465 series is dried out caps in the power supply. The 2465B I have was in the surplus pile at work because it had failed calibration. I think at first, it wouldn't even turn on. There was an auto-shutoff that triggered and turned the scope off (AFAIR, it's been a while). When I did get it to turn on, the trace was very noisy - but in my case it was more of a fat band rather than the quantization noise you're seeing. It was caused by excessive ripple resulting from dried out caps. $20 later, I had a perfectly good working 400 MHz scope.

Don't adapt to broken tools. Just get the service manual and fix it. The CRT is good so you won't have to mess with high voltage circuits (aside from perhaps some mains voltage in the supply section). My bet is that you have a dead supply or bypass cap somewhere. Just replace them. They're cheap.

~Tom
__________________
21st Century Maida Regulator, Universal Filament Regulator, Damn Good 300B, Novar Spud, and more...
Neurochrome : : Audio - http://www.neurochrome.com/audio - Engineering : : Done : : Right
  Reply With Quote
Old 16th January 2013, 10:27 PM   #14
diyAudio Member
 
Join Date: May 2011
Location: Quebec
Thanks for the advices. I have the service manual, but I'm kind of scared of making the thing worse. I may open it when my amplifier project is done...
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
So which Tek scope should I look for? tonyptony Equipment & Tools 12 1st March 2013 07:26 PM
tek 454 jechentau Tubes / Valves 2 26th September 2009 07:07 PM
Mundorf AMT 2440 for sale chengtaw Swap Meet 1 21st February 2008 03:08 PM
Tek vs Tek ak_47_boy Equipment & Tools 9 11th June 2007 05:27 PM
New TEK Scopes Bryan Tubes / Valves 22 25th November 2005 12:56 PM


New To Site? Need Help?

All times are GMT. The time now is 04:15 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2