keysight 86205A RF Bridge $498 on aliexpress - Page 1
Forum section: electronics / rf-microwave

author: dirtcooker
author_rank: Regular Contributor
timestamp: May 10, 2019, 05:10:42 pm
content: keysight 86205A RF Bridge has impressive specs and wide range 300KHz-6GHz. List price is $1930 but I spotted these for $498:https://www.aliexpress.com/item/100-original-98-new-86205A-300KHz-6GHz-RF-N-type-RF-coaxial-directional-bridge-Free-shipping/32838888371.htmlDoes anyone know if this is genuine or a dubious Chinese knockoff?

author: DaJMasta
author_rank: Super Contributor
timestamp: May 10, 2019, 10:26:15 pm
content: Unlikely, I think. It doesn't look new, it's got a cal sticker from a known cal company, and since there's a lot of manufacturing and R&D in China, there are a lot of bits of test equipment there to facilitate all that work. If the "list" price is 2k, a used price seems pretty reasonable around there. Keysight's own ebay store sells used, certified, equipment for less than half of list in most cases too.

author: TheSteve
author_rank: Unknown
timestamp: May 10, 2019, 10:29:36 pm
content: There seems to be tons of them on ebay out of China, which seems a little odd. It isn't something you'd expect to find a clone of though.

author: _Wim_
author_rank: Super Contributor
timestamp: May 11, 2019, 05:02:04 am
content: I would be worried about the 9994 pieces in stock!Have you sent the seller a question about this item? You can ask if it is NOS, used or newly made in China. Typiccally you get an honest answer.

author: DaJMasta
author_rank: Super Contributor
timestamp: May 11, 2019, 05:29:27 am
content: Oh, ha! Yes, if they can supply more than a few they definitely aren't genuine. I wonder if Keysight has even produced 10000 of them.

author: Bud
author_rank: Super Contributor
timestamp: May 13, 2019, 10:18:26 pm
content: You guys do not get it. They are 100% Shenzhen genuine.If now only someone could tell me how you define "98% new", I'd appreciate that.

author: Mr. Scram
author_rank: Super Contributor
timestamp: May 13, 2019, 10:23:15 pm
content: Quote from: Bud on May 13, 2019, 10:18:26 pmEasy. They're 2% used.

author: thm_w
author_rank: Super Contributor
timestamp: May 13, 2019, 10:49:25 pm
content: Ignore the 9999 available thing, it doesn't mean they have that many. If they run out and you try to buy it they will either try to source it or just say "out of stock".The ones in the photos are clearly genuine, imo, the question is if they are selling those or sourced from elsewhere. If it really is those ones, they somehow made their way from Seattle (micro precision cal) in 2007 to China (eg e-waste). If its from something common, like to test cell towers, they could have a lot.There is some weird "PSTQE" company branding which doesn't match the name of the store (XYW electronic), makes it seem a bit suspicious.

author: thm_w
author_rank: Super Contributor
timestamp: May 14, 2019, 05:12:53 pm
content: Here are some more photos from the seller, showing the same devices as in the sale image.Looks like they have a ton of old gear.

author: dirtcooker
author_rank: Regular Contributor
timestamp: May 25, 2019, 03:55:30 pm
content: I sent these questions to the vendor:Is this a genuine agilent/keysight bridge?Is it new?Does it meet the original manufacturer specifications?what is your return policy?And got this reply:Friend, this is used, 95%NEW, and 100% quality will be tested again before shipment.Have any quality issues, unconditional return refundReally brand original agilent/keysight. Original productI bought one of those cheap "0.1-3000MHz RF Bridge" clones, which when wired correctly have 20db or better directivity under 1 Ghz. I'm going to see if I can improve the directivity and extend the range above 1 Ghz. Some of the chinese clones aren't even wired correctly, but it's a simple fix (the 100 ohm resistors should be in parallel to make 50 ohms). The directivity charts shown for these, copied fromhttp://transverters-store.com, are pure fiction.