FS: Keithley 220 Programmable Current Source [SOLD] - Page 1
Forum section: electronics / general

author: corn11
author_rank: Regular Contributor
timestamp: April 07, 2016, 09:22:16 am
content: My Keithley 220 programmable current source is up for sale.It is in good shape and fullfills the manufacturer 1-year specification according to my HP 34401A (not calibrated, but checked against other meters).The unit has just some minor scratches (mainly on the sides and the top) and four faded felt tip markings the preowner sadly wrote down on the unit.I've renewed several components in the unit and cleaned it:- replaced the old 2-lug connector with a new Pomona 5219 3-lug triax connector and also renewed the cable (Belden 9222)- replaced the predamaged ac fan with a new silent DC fan and also the air filter- replaced nearly all caps (except for two or three film capacitors) with new premium caps (Nichicon, TDK, Kemet, WIMA)- replaced the mains switch with a new one from the successor company- replaced the single wipe sockets in the digital part with machined socketsThe unit also comes with a 1,5m Triax to BNC cable consisting of the following components:Cable: Belden 9222Triax connector: Trompeter PL75-7BNC connector: Amphenol 31-2-RFXI've spend about 110€ extra just on new parts and the triaxiale cable (receipt on request) and also a lot of time to refurbish the current source.The unit is located in Hannover, Germany. I'll ship worldwide via DHL:(general overview of the DHL shipping charges)-Germany: 7,99€-EU: 20,99€-Europe but not EU: 34,99€-USA, Canada, Israel: 48,99€-other countries: 58,99DHL shipping cost table: (~6kg parcel).http://www.dhl.de/en/paket/preise/preise-international.htmlThe price is negotiable, just send me an offer via PMI've also listed the unit on eBay (~12% higher pricing because of the eBay and PayPal fees ):eBay auction: #201561182329

author: timb
author_rank: Super Contributor
timestamp: April 07, 2016, 11:29:07 am
content: Cash only or would you consider a partial/full trade?

author: corn11
author_rank: Regular Contributor
timestamp: April 07, 2016, 12:33:07 pm
content: I would also accept a (partial) trade if you have something I'm interested inI'm currently looking for one of the following things:-an Agilent DSO-X20(02/04/12/14)A or a Rigol (DS/MSO)2072(A) would be nice (of course plus some additional cash from me)-an arbitrary function generator (Agilent 33120a/33210a or similar/better with a similiar price point)-an Agilent E3631AI've imported the Keithley 220 round about 9 months ago from the US maybe it is possible to save the custom duties in case of a reimport into the US.

author: corn11
author_rank: Regular Contributor
timestamp: April 13, 2016, 07:37:25 am
content: Down to 425€ + shipping. Thats just as much I've invested (not counting my time to get it in this condition) and also cheaper than buying a Keyithley 220 on eBay just tested as "powers on".You can also replicate Dave's latest experiment with the Keithley 220 (provided you've a photon counter)

author: corn11
author_rank: Regular Contributor
timestamp: April 24, 2016, 11:41:17 am
content: Price drop: 405€

author: rastro
author_rank: Frequent Contributor
timestamp: April 24, 2016, 08:09:22 pm
content: hello corn11,I was wondering what the part number/manufacture for the mains switch. I have a marginal marginal switch on a Keithley 617 - they look about the same.-rastro

author: corn11
author_rank: Regular Contributor
timestamp: April 24, 2016, 09:51:13 pm
content: Hi rastro,I've replaced the old mains switch manufactured by Schadow with the similar model from C&K (I guess Schadow had been acquired by ITT which also acquired C&K):NE182UEE6AMPMouser part no: 611-NE182UEE6AMPA little comparison before I've assembled the switch:

author: mojoe
author_rank: Frequent Contributor
timestamp: April 25, 2016, 02:48:27 am
content: I love fancy test equipment as much as the next guy, but at the risk of showing my ignorance, what would I use this for?

author: corn11
author_rank: Regular Contributor
timestamp: April 25, 2016, 06:42:24 am
content: You could for example use it to characterize diodes, BJTs, transimpedance amplifiers or make high resistance (compliance voltage up to +-105V) and hall effect measurements.

author: corn11
author_rank: Regular Contributor
timestamp: April 27, 2016, 05:23:08 pm
content: Sold