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| Flood of new Agilent 82357B GPIB-USB adaptors on eBay the real deal? |
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| Jwalling:
--- Quote from: rfeecs on August 13, 2015, 12:36:58 am --- --- Quote from: philpem on August 13, 2015, 12:07:48 am ---What's making me curious is where they're getting the Agilent custom GPIB controller chips... surely there aren't that many broken 82537Bs kicking around with working chips they can salvage? --- End quote --- It seems to be readily available: http://www.digchip.com/datasheets/quote.php?action=search&pn=1822-0639 I think it was used in other Agilent equipment as well. --- End quote --- It's in the 34970A, 34401A, and 8753ES/ET. From the description in the 34401A it's: IC-GPIB Controller IEEE-488 1975/78 01295 TMS9914AFNL It's a TI part. Interesting that Keysight find-a-part lists it: NFTS IC ASIC HPIB CONTROLLER, KEYSIGHT TRADE RESTRICTED. Item Status: Not orderable, Contact Keysight for repair service Looks like it's obsolete... Jay |
| MarkL:
--- Quote from: N8AUM on September 10, 2015, 07:56:13 am ---Just purchased th $51 special :-DD Any thoughts about this item ? http://www.ebay.com/itm/UGSimple-USB-to-GPIB-Controller/171631337518?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D32933%26meid%3De549fb8648b14c60850c30a218eb9cb7%26pid%3D100005%26rk%3D2%26rkt%3D6%26mehot%3Dpp%26sd%3D251692772284 --- End quote --- The seller states: --- Quote ---The maximum length of a GPIB command send or a data read is 60bytes. Binary data transferring is not supported on UGSimple USB to GPIB Controller. --- End quote --- Both of these, each on their own, are crippling limitations. The seller says the binary issue will be fixed "soon". Personally, I don't buy future features or promised bug fixes. (Had to learn that lesson several times...) Plus, no idea what kind of GPIB line drivers (if any) you'll find inside. I wouldn't buy this adapter. |
| N8AUM:
Mark, I saw the "future features" part but missed the length of data it can handle :palm: TNX 4 the heads up ! |
| N8AUM:
So far so good with the 82357B GPIB USB Interface-Compatible that cost me $51 DELIVERED in 5 days from China ! Had no problems when I hooked up my 53131 but had change the "Agilent 488 properties" in order to use the programs from KE5FX for my old 8591E. I opened it up and was surprised how well it looked, no complaints from me :-+ In my opinion it was well worth the $51 |
| neopticus:
I also purchased the "new" version of 82357B from nettcy168: http://www.ebay.com/itm/82357B-GPIB-USB-Interface-Compatible-AGILENT-82357B-new-version-/251692772284 It arrived to Finland quite fast (in less than a week) via DHL. It seems to work just fine with BenchVue (detects my instruments, can send and receive commands/data) but I haven't done any fast data retrieval or long-term testing. Dadler already posted some pictures of the tear-down so I won't repeat that here, but I did open it up to check the construction and it seems to be hand-soldered. Few slightly kinked components and few pieces of stray solder on the PCB but nothing weird otherwise. I scraped the extra solder away to make sure they don't get loose later and cause short circuiting, and I suggest you do that too if you buy the same adaptor. Anyway, for 52 USD it wasn't a bad deal. On his eBay page he states that it's "compatible with 82357B" and not authentic device, so I guess there's no complaining that they are not genuine Agilent devices (even though the sticker on the back side states otherwise) :) |
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