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 BWD 1722B large screen CRO
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 Return to top of page · Post #: 1 · Written at 9:49:47 AM on 5 October 2020.
Sirwin's avatar
 Location: QLD
 Member since 10 April 2009
 Member #: 465
 Postcount: 106

Hello all.

I recently obtained a BWD large screen oscilloscope (17") and would like to restore it to working condition. However, I've not been able to find any service information for it. Would anyone be able to help. Even a decent circuit diagram would be most helpful. My unit has two plug in modules; a 17B four channel amplifier and a 17E time base.

Regards, Stu

BWD Cathode Ray Oscilloscope


 
 Return to top of page · Post #: 2 · Written at 12:11:15 PM on 5 October 2020.
GTC's avatar
 GTC
 Location: Sydney, NSW
 Member since 28 January 2011
 Member #: 823
 Postcount: 6242

BWD technical documentation is hard to come by. I'll check around for you.


 
 Return to top of page · Post #: 3 · Written at 8:15:25 PM on 5 October 2020.
Brad's avatar
 Administrator
 Location: Greenwich, NSW
 Member since 15 November 2005
 Member #: 1
 Postcount: 6625

I wish we got to use these at tech. We only had the standard ones with the smaller screens.


‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
A valve a day keeps the transistor away...

 
 Return to top of page · Post #: 4 · Written at 10:26:14 AM on 6 October 2020.
Sirwin's avatar
 Location: QLD
 Member since 10 April 2009
 Member #: 465
 Postcount: 106

Brad, this scope has limitations. Only 15 kHz bandwidth! 4 channel, so there's that. Strictly for classroom demonstrations I would think, but cool all the same. It must have cost a huge amount back in the day though.


 
 Return to top of page · Post #: 5 · Written at 11:44:56 AM on 6 October 2020.
Brad's avatar
 Administrator
 Location: Greenwich, NSW
 Member since 15 November 2005
 Member #: 1
 Postcount: 6625

We generally only measured to 100Hz (electrical trade) though the same gear would have been used for the electronics apprenticeships. I am not sure how far up they'd have needed to go at the time.


‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
A valve a day keeps the transistor away...

 
 Return to top of page · Post #: 6 · Written at 11:29:56 PM on 6 October 2020.
Marcc's avatar
 Location: Wangaratta, VIC
 Member since 21 February 2009
 Member #: 438
 Postcount: 4546

Mine is a 539C. Saw info somewhere but did not need as I have its original book & probes. Bought it at a clearing sale, $30 took around 2Hrs+ to get it & the grot separated, did not keep the grot. Needs one pot replacing, which will involve my drill press.


 
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