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-   -   HP 05247-6008 display board or 5082-5087 decoder (https://www.vintage-radio.net/forum/showthread.php?t=173726)

factory 30th Nov 2020 11:27 am

HP 05247-6008 display board or 5082-5087 decoder
 
2 Attachment(s)
I'm currently working on a rather poorly HP 5248M counter, unfortunately one of the display decoders has been ruined by damp, which has eaten some of the traces from the photo resistor plate.

Does anyone have a replacement display board with part no. 05247-6008, or the decoder photo resistor plate part no. 5082-5087/1990-0018?

Note the standard 5245L uses a different decoder plate which is not useable in the 5248M, but the actual PCB looks identical.

David

factory 26th Jan 2021 3:35 pm

Re: HP 05247-6008 display board or 5082-5087 decoder
 
Mods please close this wanted post, as I now have a few spare boards of a different type from Sphere in Canada. I discovered the difference in the decoder plates & divider circuit is due to the BCD code options with these HP counters, most use 1,2,2,4 code and some use 1,2,4,8 code.

David


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