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Long story short you cant fix the 8481 or replace them with a diode , the 848x series was based on a thermocouple that was designed by HP , the parts are not available from HP , one guy sells waffle packs of them on ebay for like $7000 or so but even if you buy them replacing the part requires a lot of skills and a steady hand , as far as diodes concerns the output voltage of diodes and the characteristics are not compatible with the electronics in the 848x
*From:* [email protected] <[email protected]> *On Behalf Of *visitslovenija via groups.io
*Sent:* Thursday, May 19, 2022 5:20 AM
*To:* [email protected]
*Subject:* Re: [HP-Agilent-Keysight-equipment] A homemade diode power sensor for HP meters
An interesting and long running thread.
Like many, I have a bit of a soft spot for the old HP435 meters and would like to have one working on the bench.
Since broken detectors do show up now and again at a decent price, has anyone successfully reworked one with busted thermocouples and modified for a diode front end? I know it’s small and very fiddly, but is that not easier than trying to build one from scratch?