Oscilloscope GW GOS-643

[mabcs]

hello anyone know give me an opinion on this scope? I can not find neither manual nor technical, but it exists! GW GOS-643 40 mhz

[pelleman]

Lets dig up this long dead thread.
Yes, I can testify it exists. Mine is a bit dim but otherwise a bobby dazzler. Built like a brick dunny. 
I have scanned the manual. Enjoy this PDF!

http://marsba.se/?p=129

GOOD WILL INSTRUMENT CO., LTD
40MHz Dual Trace Oscilloscope
Model: GOS-642 / GOS-643

[retired tech]

Hi,Pelleman, I have a GOS-643 that has a problem in the vertical section(off screen).If I remove the delay line and feed a variable voltage to it,I can get a good trace(H ok).Do you still have a schematic and trace diagrams for this machine.I set aside for a couple of years,as I have another scope,so wasn't in a hurry to repair it.I tried  marsa.se but the site has disappeared.Any help would be appreciated.

[ebastler]

Pelleman has only one post on this forum, and has last been active here in November 2015 according to his profile. So he is unlikely to see this enquiry, I'm afraid. But maybe someone else has that manual?