Products > Test Equipment
HP 400D Tantalum Capacitors?
(1/2) > >>
KK7DTE:
I'm not finding tantalum capacitors listed in the HP 400D VTVM service manual, but I have two in mine and I have seen two others online with the same capacitors. How do I find their values? They are heavily corroded. Maybe there are other schematics or parts lists I'm not seeing? This unit's serial number is 28830. Picture below:
factory:
And what is it connected too? I can't tell from the picture.

David
HalFoster:
Looks more like a diode to me...
factory:
Guessing it's these unlabelled parts on the layout drawing?

They seem to be C20 & C31 in the earlier book here; https://www.kennethkuhn.com/hpmuseum/scans/hp400d_h.pdf

C20 is 8uF 30V part #18-17 (aka 0180-0010 tantalum)
https://www.parttarget.com/5910-00-644-3743_5910006443743_PP8B30A1.html

C31 is 4uF 60V part #18-15 (aka 0180-0008)
https://www.parttarget.com/5910-00-643-6892_5910006436892_PP4B60A1.html/

David
factory:

--- Quote from: HalFoster on October 22, 2024, 05:59:54 pm ---Looks more like a diode to me...

--- End quote ---

Apparently they are an early form of tantalum capacitor made by Fansteel, attached is an advert from 1956.



David
Navigation
Message Index
Next page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod