Gould DSO-400 Digital Storage Oscilloscope CRT - Electronic Circuits Projects Diagrams Free

rmn_tech · 14th December 2007, 12:11 AM

Gould DSO-400 Digital Storage Oscilloscope

Hi I've acquired the above oscilloscope however the CRT is damaged and I am unable to identify the type or locate a service manual.

Any help you guys can provide would be appreciated.

The CRT label has the following information.

TOSHIBA
E2808B3(either I or 1 not to clear)

5H23......................................8853

Hope somebody can help
Thanks Rick.

**Nigel Goodwin** · 14th December 2007, 02:15 PM

No idea where you would get one, but I wouldn't have thought it would be worth it?, generally a new CRT costs more than the complete unit!.

ericgibbs · 14th December 2007, 03:11 PM

hi,
The manual is here: http://www.eserviceinfo.com/download.php?fileid=26822

Look on eBay for people selling scopes as spare parts only.

rmn_tech · 14th December 2007, 04:17 PM

Thanks I have already downloaded the manual but it is only the user manual.

After a more detailed examination the CRT seems to be similar to the tubes in small portable TV units as the display is used to display Menus etc.

I have a seven inch CRT (Diagonal) that I will use to test the unit but the original is 5 inch Diagonal.

As these TVs can be bought dirt cheap if it works on the seven inch tube I will purchase a five inch TV and strip it for the tube.

A damn site cheaper than a new scope.

**Nigel Goodwin** · 14th December 2007, 04:18 PM

Right, so it's not a scope tube then?.

rmn_tech · 14th December 2007, 04:26 PM

Not as such it would seem to be a standard monochrome CRT using deflection coils. The manual gives details of screen lines etc.

rmn_tech · 17th December 2007, 02:29 AM

The larger tube worked well enough to show that the unit is serviceable though the image was distorted due to incorrect EHT, focus voltage etc.

So now I'm on the look out for a smaller tube.

**Nigel Goodwin** · 17th December 2007, 11:09 AM

Good luck - there are a few different types, but many are interchangeable.

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14th December 2007, 12:11 AM	(permalink)
rmn_tech	Gould DSO-400 Digital Storage Oscilloscope CRT Gould DSO-400 Digital Storage Oscilloscope Hi I've acquired the above oscilloscope however the CRT is damaged and I am unable to identify the type or locate a service manual. Any help you guys can provide would be appreciated. The CRT label has the following information. TOSHIBA E2808B3(either I or 1 not to clear) 5H23......................................8853 Hope somebody can help Thanks Rick. __________________ I think, therefore I am. Therefore I must be !!! I think ???

14th December 2007, 02:15 PM	(permalink)
Nigel Goodwin	No idea where you would get one, but I wouldn't have thought it would be worth it?, generally a new CRT costs more than the complete unit!. __________________ PIC programmer software, and PIC Tutorials at: http://www.winpicprog.co.uk

14th December 2007, 03:11 PM	(permalink)
ericgibbs	hi, The manual is here: http://www.eserviceinfo.com/download.php?fileid=26822 Look on eBay for people selling scopes as spare parts only. __________________ Eric "Good enough is Perfect" PIC tutorials: Gramo's: www.digital-diy.net/ Bill's: www.blueroomelectronics.com/

14th December 2007, 04:17 PM	(permalink)
rmn_tech	Thanks I have already downloaded the manual but it is only the user manual. After a more detailed examination the CRT seems to be similar to the tubes in small portable TV units as the display is used to display Menus etc. I have a seven inch CRT (Diagonal) that I will use to test the unit but the original is 5 inch Diagonal. As these TVs can be bought dirt cheap if it works on the seven inch tube I will purchase a five inch TV and strip it for the tube. A damn site cheaper than a new scope. __________________ I think, therefore I am. Therefore I must be !!! I think ???

14th December 2007, 04:18 PM	(permalink)
Nigel Goodwin	Right, so it's not a scope tube then?. __________________ PIC programmer software, and PIC Tutorials at: http://www.winpicprog.co.uk

14th December 2007, 04:26 PM	(permalink)
rmn_tech	Not as such it would seem to be a standard monochrome CRT using deflection coils. The manual gives details of screen lines etc. __________________ I think, therefore I am. Therefore I must be !!! I think ???

17th December 2007, 02:29 AM	(permalink)
rmn_tech	The larger tube worked well enough to show that the unit is serviceable though the image was distorted due to incorrect EHT, focus voltage etc. So now I'm on the look out for a smaller tube. __________________ I think, therefore I am. Therefore I must be !!! I think ???

17th December 2007, 11:09 AM	(permalink)
Nigel Goodwin	Good luck - there are a few different types, but many are interchangeable. __________________ PIC programmer software, and PIC Tutorials at: http://www.winpicprog.co.uk