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beanflying:

--- Quote from: Illusionist on October 03, 2019, 05:56:34 pm ---I got an Agilent 34410A two days ago, and just got chance to get inside and check it out. Cost £360 all-in from eBay, and was due for recalibration in Jan .....

snip

That fan though... it almost drowns out the vacuum cleaner! Well, it did. It now has a 100Ω resistor inline with it and is much quieter. My lab (repurposed bedroom) is kept quite cool so I doubt it's an issue. I might still change it out for a 15mm thick Sunon maglev though, and run that slower too.

Anyway, I'm chuffed to bits as they say, and here are some pictures:


--- End quote ---

Not all 34401A's had fans or even case ventilation. My late Agilent era has neither and is more stable as well as I can determine than my 34461A by a few PPM over a 10C temperatrure swing. Do some searching as I never have re fan or no fan?

Today's unneeded plaything is a Gertsch Decade Ratio Transformer. No particular use for it other than it will be a fun toy for the collection. I was watching it and the seller put out a reduced price offer and it had very low freight costs from the USA to Oz so I obliged  ;D

Will fit in with my Valhalla 2703 AC Cal. and 2500EP Current Amp. (when I get it repaired) but other than that just for fun.

Mr. Scram:
beanflying, it seems you fell for the classic switcharoo of the HP/Agilent number system. 34410A not 34401A. :)

beanflying:
oops I blame a lack of coffee  :-DD and HP for dyslexic numbering  :horse:

don.r:
Picked this up about 2 years ago for $100 as a parts unit. Works perfectly fine AFAIK.

Neomys Sapiens:

--- Quote from: don.r on October 06, 2019, 05:40:23 pm ---Picked this up about 2 years ago for $100 as a parts unit. Works perfectly fine AFAIK.

(Attachment Link)

--- End quote ---
Didn't know that one before. Even without 4-wire connection, a Milliohmmeter (or microohm-meter) from a serious western manufacturer for 100.- is a laudable find.

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