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 > Specific Vintage Equipment > Vintage Test Gear and Workshop Equipment

Notices

Vintage Test Gear and Workshop Equipment For discussions about vintage test gear and workshop equipment such as coil winders.

Reply
 
Thread Tools
Old 14th Jul 2018, 12:16 pm   #1
Oldgeorge
Triode
 
Oldgeorge's Avatar
 
Join Date: Feb 2017
Location: Seaham, County Durham, UK.
Posts: 34
Default Display shimmering at edges ( PM3375 Philips )

I am having an issue with my PM3375 scope.
The problem is that the trace in the centre section of the CRT is fine but towards the outside edges it sort of shimmies very quickly from side to side.
Its the same in all modes including digital freeze mode.
The menu text in digital mode is ok in the centre but " raggy" at the ends.
All controls work normally.
The effect is on all timebase speeds.
Attached Thumbnails
Click image for larger version

Name:	IMG_0165.jpg
Views:	83
Size:	47.1 KB
ID:	166042  
__________________
DE G6AGZ

Last edited by Oldgeorge; 14th Jul 2018 at 12:22 pm.
Oldgeorge is offline   Reply With Quote
Old 14th Jul 2018, 12:45 pm   #2
MrBungle
Nonode
 
MrBungle's Avatar
 
Join Date: Jun 2016
Location: London, UK.
Posts: 2,451
Default Re: Display shimmering at edges ( PM3375 Philips )

This might be early signs of power supply problems. It’s about the right age to need a refurb. I’d check the power supply rails for noise.
MrBungle is offline   Reply With Quote
Old 14th Jul 2018, 7:09 pm   #3
Oldgeorge
Triode
 
Oldgeorge's Avatar
 
Join Date: Feb 2017
Location: Seaham, County Durham, UK.
Posts: 34
Default Re: Display shimmering at edges ( PM3375 Philips )

Yes thats what I was thinking, need to get hold of a diagram, but hen's teeth would be easier to acquire

I do have other scopes so checking won't be a problem.
__________________
DE G6AGZ
Oldgeorge is offline   Reply With Quote
Old 15th Jul 2018, 12:57 am   #4
karesz*
Hexode
 
Join Date: Jun 2010
Location: Zurich, Switzerland
Posts: 463
Default Re: Display shimmering at edges ( PM3375 Philips )

Hello,
you can download it_after some waiting...
rgds, Karl
karesz* is offline   Reply With Quote
Reply

Thread Tools



All times are GMT +1. The time now is 4:49 am.


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 - 2018, vBulletin Solutions, Inc.
Copyright ©2002 - 2018, Paul Stenning.