Products > Test Equipment

HP 1741A oscilloscope - restoration project

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lowimpedance:
Fantastic restoration.
Another quality peice of gear rescued from the scrap heap.
There is a 1741a in the instrument store at work collecting dust, now I am motivated to get it out and fire it up  :).
Great final photo.
Now you can sit back and sip a nice cool beer and admire your work, you have definately earned it.
BTW are you now going to be called HPfan ?? :D

vk6hdx:
Nice work and great result, thanks for sharing this restoration project with us.

Troy

BravoV:
Thanks for sharing this restoration job, well done and congratulations too !

Btw, what Jim Williams pulse generator ? Link ?

tekfan:

--- Quote from: BravoV on October 17, 2011, 07:04:32 am ---Btw, what Jim Williams pulse generator ? Link ?

--- End quote ---

http://cds.linear.com/docs/Application%20Note/an47fa.pdf

Page 93-95

I've tried to make it as small as possible for my self for the convenience. A little flimsy on the stripboard but it works:

BravoV:

--- Quote from: tekfan on October 18, 2011, 07:29:56 pm ---
http://cds.linear.com/docs/Application%20Note/an47fa.pdf

Page 93-95

I've tried to make it as small as possible for my self for the convenience. A little flimsy on the stripboard but it works:


--- End quote ---
Thank you for pointing that Jim's circuit, guess with my recently acquired 400Mhz old analog tek scope, I will make one to see how much it's rise time, should be interesting to observe.

Yours looks so cool and compact sized, love the front transistor and the trimmer cap position, a dead bug style but the best for high freq stuff.

Looks like I will substitute the 90 volt generator with common popular MC34063 and probably with 9 volt battery instead of small 1.5 volt like yours, also I'm thinking it might not easy to find that old 2N2369 transistor anymore, do you still have one to spare ? ;)

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