Hickok 539b

arcane secrets and handshakes revealed!

Hickok 539b

Postby 6B4G » Sun Nov 27, 2011 10:15 am

Does anyone have any experience with a Hickok 539B?
I went through the calibration process and all the readings were within specifications, I can’t test rectifier tubes without bending the meter needle. I just can’t see what’s wrong with the tester.
User avatar
6B4G
KT88
 
Posts: 282
Joined: Sun Jul 06, 2008 1:02 pm
Location: Greece

Postby battradio » Sun Nov 27, 2011 3:30 pm

Doubble check the shunt pot , it may be open or the wipper not making contact
Mark
Image
User avatar
battradio
KT88
 
Posts: 927
Joined: Tue Mar 10, 2009 12:58 am
Location: near ST.Louis MO.

Postby 6B4G » Mon Nov 28, 2011 8:13 am

Thanks I'll give it a lookover
User avatar
6B4G
KT88
 
Posts: 282
Joined: Sun Jul 06, 2008 1:02 pm
Location: Greece

Postby 6B4G » Tue Nov 29, 2011 10:37 pm

Mark I took a look at the shunt pot and found it a little erratic so I took it out and gave it a clean inside and now it’s good. I ran the Diode/Rectifier test again and on change, the needle jumps hard right (with no tube inserted) I also saw that when I turn the selector to position F (600) the needle wants to go hard left and when reversing the meter you can see that it travels as hard as the Diode/Rectifier test. I am stumped at what it can be, I have been trying to trace cables with the schematics but without cutting all the ties it is impossible. Plus I am afraid to do that in case I do more damage. :(
User avatar
6B4G
KT88
 
Posts: 282
Joined: Sun Jul 06, 2008 1:02 pm
Location: Greece

Postby battradio » Tue Nov 29, 2011 11:48 pm

You most likely have an open wire wound resistor or an open winding on one of the transformers .

Go to ARF and ask on the test equiptment forum and ask about it there .

http://antiqueradios.com/forums/viewforum.php?f=8

Never mind i see that you did . (lol)
http://antiqueradios.com/forums/viewtop ... 8&t=180083
Mark
Image
User avatar
battradio
KT88
 
Posts: 927
Joined: Tue Mar 10, 2009 12:58 am
Location: near ST.Louis MO.

Postby 6B4G » Wed Nov 30, 2011 12:33 am

(lol) (lol) (lol)
User avatar
6B4G
KT88
 
Posts: 282
Joined: Sun Jul 06, 2008 1:02 pm
Location: Greece

Postby 6B4G » Thu Dec 01, 2011 7:32 am

This is a pain :'( the schematics and the resistor positions are all over the place. I'm going to file it in the "to hard basket" for now. And when I have time I will look at it or just get rid of it.



Greg
User avatar
6B4G
KT88
 
Posts: 282
Joined: Sun Jul 06, 2008 1:02 pm
Location: Greece


Return to test & measurement

Who is online

Users browsing this forum: No registered users and 1 guest