DIY Curve Tracer for PC - Page 28 - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 3rd September 2012, 08:02 AM   #271
diyAudio Member
 
Join Date: May 2008
Location: NRW
Default Device not found

Hello curve tracer user,

I connected the curve tracer in accordance to the manual.
The Power supply is the recommended HP 32V DC 2500 mA.

When I connected the USB cable the PC shows me "new hardware found and ready to use".

I started the software and followed the steps written in the manual.
But then the system shows me "device not found".
The com port is the right one.

I noticed that the heatsink is getting hot very quick and I made some measurement of the temperature (see picture attached).
In my opinion it's very hot.

Thank you in advance for your help.

Andreas
Attached Images
File Type: jpg Curve Trace 02a.JPG (441.4 KB, 363 views)
  Reply With Quote
Old 3rd September 2012, 09:05 AM   #272
diyAudio Member
 
Bksabath's Avatar
 
Join Date: Dec 2007
Yes definetly sometink badly wrong
Mine get sligtly worm after testing 50 big dudas
  Reply With Quote
Old 3rd September 2012, 09:08 AM   #273
diyAudio Member
 
Join Date: Jul 2002
Location: ISRAEL
Did you insulate the screws going through the power transistors??
I don`t see the plastic bushings there..
  Reply With Quote
Old 3rd September 2012, 09:23 AM   #274
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
Screws are making contact with front face of transistors and you have multiple shorts. Always test transistors for sink isolation with DMM resistance check. Simple, fast and safe
__________________
...Shape the sound , Man!
  Reply With Quote
Old 3rd September 2012, 09:39 AM   #275
diyAudio Member
 
Join Date: May 2008
Location: NRW
I used plastic bushings and insulating foil.
Maybe one foil is damaged.
I will check it with a DMM tonight.

Thank you.

Andreas
  Reply With Quote
Old 4th September 2012, 04:17 AM   #276
locky_z is offline locky_z  China
diyAudio Member
 
Join Date: Jun 2004
Location: XH
the LM317 hot,may be 24V output wrong.

You can short socket 'X Y Z' and power on, if 24V 12V 5V and MCU is ok,you may hear some relay sound.

Last edited by locky_z; 4th September 2012 at 04:26 AM.
  Reply With Quote
Old 4th September 2012, 09:48 AM   #277
diyAudio Member
 
Join Date: May 2008
Location: NRW
I did the DMM resistance check and it seems like that 3 transistors ( the red circles) have contact to the Aluminum-angle.
I removed the angle and find out that they have contact to the Aluminum ground-plate as well
Then I removed the board from the ground-plate and everything works.
I did the DMM resistance check between the "red" transistors and the metal-ring fixture hole (yellow) and find out that they are connected.
I will fix the board with plastic bushings or plastic stands and then I hope it will work.

Does all the other user have plastic cases or fixed the board with insulation parts or is there something else I have to check?
Attached Images
File Type: jpg Curve Trace 02b.JPG (448.1 KB, 319 views)
  Reply With Quote
Old 4th September 2012, 01:52 PM   #278
diyAudio Member
 
buzzforb's Avatar
 
Join Date: Oct 2010
Location: Burlington, NC
Mine is totally isolated.
__________________
...Shape the sound , Man!
  Reply With Quote
Old 4th September 2012, 09:59 PM   #279
diyAudio Member
 
Join Date: Aug 2011
Quote:
Originally Posted by andreas w. View Post
Does all the other user have plastic cases or fixed the board with insulation parts or is there something else I have to check?
Hi Andreas,

could there be something wrong with your fixing to the ground plate? As I understood from your description, the function came back when the board wasn't fixed on the ground plate any more...
BTW, it's O.K. that the three parts on the side have connection to ground (the first is the 12V voltage regulator with Pin 2 to GND and the other two ones (Q1, Q4) are the PNP transistors with Collector connected to GND).

Mine is buildt into a steel case (only isolated the parts on the side) and everything works fine!

Regards,

Chris
  Reply With Quote
Old 5th September 2012, 09:54 AM   #280
locky_z is offline locky_z  China
diyAudio Member
 
Join Date: Jun 2004
Location: XH
You also no use heatsink and power on 32V, but the LM317 may have a little hot,
And you can measure LM317 output is 24V,
measure 7812 output is 12V,
78L05 output is 5V,

If the voltage not ok, may have some compent error.
  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
Using The Tektronix 575 Curve Tracer Mark A. Gulbrandsen Solid State 29 21st May 2012 08:01 PM
B-H Curve Tracer gpapag Equipment & Tools 9 16th January 2011 09:22 PM
curve tracer? maxpou Solid State 4 24th October 2009 06:29 PM
Virtual Tek 576/577 curve tracer in EWB V10 jackinnj Equipment & Tools 0 1st March 2007 02:41 PM
FS: tektronix 575 curve tracer SQ Kid Swap Meet 3 11th July 2004 05:22 PM


New To Site? Need Help?

All times are GMT. The time now is 10:56 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