UK Vintage Radio Repair and Restoration Powered By Google Custom Search Vintage Radio Service Data

Go Back   UK Vintage Radio Repair and Restoration Discussion Forum > General Vintage Technology > Success Stories

Notices

Success Stories If you have successfully repaired or restored a piece of equipment, why not write up what you did and post details here. Particularly if it was interesting, unusual or challenging. PLEASE DO NOT POST REQUESTS FOR HELP HERE!

Reply
 
Thread Tools
Old 21st Nov 2020, 11:14 am   #1
jonnybear
Octode
 
jonnybear's Avatar
 
Join Date: Nov 2010
Location: Cullompton, Devon, UK.
Posts: 1,303
Default Ring (LOPT) tester

Back in the days of the CRT I used to spend hours trying to fault find LOPTX so I built a crude tester which saved me hours and replacement costs, then about 15 years ago I built a twin ic one which has served me well and works on all different types of transformer.
During lockdown I was looking for something to do, having been given some Oak and mahogany off cuts, so thought I would make a little box, the next thing I saw on the bench was a sky + display so decided to build a new ring tester, after making the box cutting hole for display and making up circuit I found the sky + display was incompatible as the diodes were reversed so had to compromise with a led bar display filling hole with filler, it all turned out well in the end costing just a couple of pounds and surplus components.
Attached Thumbnails
Click image for larger version

Name:	DSC07649.jpg
Views:	101
Size:	103.8 KB
ID:	220871   Click image for larger version

Name:	DSC07648.jpg
Views:	98
Size:	95.0 KB
ID:	220872  

Last edited by Cobaltblue; 21st Nov 2020 at 11:20 am. Reason: help understand what kind of ring
jonnybear is offline   Reply With Quote
Old 21st Nov 2020, 5:54 pm   #2
Trevor
Heptode
 
Join Date: Aug 2006
Location: Stoke-on-Trent, Staffordshire, UK.
Posts: 769
Default Re: Ring (LOPT) tester

Love it but please explain how it works and a schematic
Trev
Trevor is offline   Reply With Quote
Old 21st Nov 2020, 10:36 pm   #3
Cobaltblue
Moderator
 
Cobaltblue's Avatar
 
Join Date: Dec 2010
Location: Exeter and Poole, UK.
Posts: 4,143
Default Re: Ring (LOPT) tester

Quote:
Originally Posted by Trevor View Post
Love it but please explain how it works and a schematic
Trev
Nice explanation and circuit here.

https://wenku.baidu.com/view/ea87f92...7e87197f4.html

If you want to discuss this further I suggest a new thread.

Cheers

Mike T
__________________
Don't care if it was a bargain why's it in my kitchen
Mike T BVWS member.
www.cossor.co.uk
Cobaltblue is offline   Reply With Quote
Reply

Thread Tools



All times are GMT. The time now is 11:46 pm.


All information and advice on this forum is subject to the WARNING AND DISCLAIMER located at https://www.vintage-radio.net/rules.html.
Failure to heed this warning may result in death or serious injury to yourself and/or others.


Powered by vBulletin®
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Copyright ©2002 - 2020, Paul Stenning.