Sold   Hp Agilent Keysight  34401a  freshly calibrated - Page 1
Forum section: electronics / general

author: coromonadalix
author_rank: Super Contributor
timestamp: February 25, 2019, 03:34:22 pm
content: sold thks

author: maginnovision
author_rank: Super Contributor
timestamp: February 25, 2019, 06:59:06 pm
content: In addition to the pictures of the unit could you put some from cal report?

author: Mr. Scram
author_rank: Super Contributor
timestamp: February 25, 2019, 07:18:36 pm
content: I'm eager to see some pictures too.

author: coromonadalix
author_rank: Super Contributor
timestamp: February 25, 2019, 09:29:45 pm
content: sold

author: maginnovision
author_rank: Super Contributor
timestamp: February 25, 2019, 10:00:39 pm
content: What was the date of cal, can you post a cover letter or by pm?

author: coromonadalix
author_rank: Super Contributor
timestamp: February 25, 2019, 10:06:51 pm
content: sold

author: chekhov
author_rank: Regular Contributor
timestamp: February 25, 2019, 10:21:12 pm
content: QuoteIt seems that the whole board was replaced instead, which might be good sign as well. (based on production date and the fact thatplugs not all red if I'm not mistaken). So, first they must have replaced the main board, maybe before 2005 ?, then front panel as well.Overall, looks very nice and clean!

author: coromonadalix
author_rank: Super Contributor
timestamp: February 25, 2019, 10:51:55 pm
content: the only things i know / i may be wrongThere some malaysia meters who where built with the revision 11 and version 3 for the display ?? discussed here on some threads ??The latest version where 11-05-03 i think ??Apparently a brand new vfd pcb display is v 03 ??The olders 34401a with " full red terminals plugs " i have bought from fleabay to be rebuilt have the same FW 07 on the stickers ?? and have the same vfb pcb 34401-66512 version with the one i sell.The working one with a dim 50% left has US361007xx serial ? and FW 07-05-02 ?

author: 0culus
author_rank: Super Contributor
timestamp: February 26, 2019, 12:20:03 am
content: Why does it say Keysight on the front panel, but Hewlett-Packard on the rear panel? IIRC there were at least a few years of Agilent in between the two.

author: Mr. Scram
author_rank: Super Contributor
timestamp: February 26, 2019, 01:27:12 am
content: It looks like it's a HP meter with a new Keysight front fitted. Both the branding and place of manufacture are what is expected from an older HP meter. I'm not entirely sure the black terminal units were ever sold under the HP brand, so the terminals or the entire board may have been replaced. It looks to be an older unit with various components replaced at a later date, plus the recent recap.

author: coromonadalix
author_rank: Super Contributor
timestamp: February 26, 2019, 02:06:06 am
content: sold

author: bitseeker
author_rank: Super Contributor
timestamp: February 26, 2019, 03:50:43 am
content: The serial number is from the period consistent with an HP-branded meter with all-red jacks. Some had the older display controller, some the newer one. The combination of red and black jacks began with Agilent branding from what I've seen, and they have the newer display controller. The rounded-rectangle buttons and elliptical shift button on the front panel of this one are the most recent facelift to the 34401A line and can have Agilent or Keysight branding.I previously owned two 34401A that were like the meter that this one appears to have begun its life as: HP-branded with all-red jacks. Both of mine had the old display controllers. My current 34401A is Agilent-branded with red and black jacks and rectangular shift key.Based on coromonadalix's description of its insides and the calibration result, it sounds like a good unit and no need to worry about an unobtanium old version display controller dying.

author: artag
author_rank: Super Contributor
timestamp: February 26, 2019, 11:32:36 pm
content: I have a 34401A with red and black jacks and HP branding. From the stickers on it, it seems to have been resold through Agilent in 2000. It's serial US36099973.

author: Mr. Scram
author_rank: Super Contributor
timestamp: February 26, 2019, 11:34:47 pm
content: Quote from: artag on February 26, 2019, 11:32:36 pmIs the enter button grey or lighter blue? Maybe it's been a unit repaired under warranty.

author: artag
author_rank: Super Contributor
timestamp: February 26, 2019, 11:38:25 pm
content: I'd call it grey. I do have an Agilent 6632B which has a blue button, and it's definitely not that colour.

author: Mr. Scram
author_rank: Super Contributor
timestamp: February 27, 2019, 12:00:06 am
content: Quote from: artag on February 26, 2019, 11:38:25 pmThe button and jacks suggest it's an Agilent unit, so the HP branding is interesting. I can imagine parts being replaced at Agilent or someone combining two units.

author: coromonadalix
author_rank: Super Contributor
timestamp: February 27, 2019, 12:04:12 am
content: sold

author: Mr. Scram
author_rank: Super Contributor
timestamp: February 27, 2019, 12:09:04 am
content: Quote from: coromonadalix on February 27, 2019, 12:04:12 amI think the light blue ones are found on HP all red socket units and grey buttons are found on red and black socket Agilent units. I've so far not found exceptions to this, but I can't say for certain they don't exist. It seems production moved from the US to Malaysia around the same time as these things were changed.A major problem is that there's a lot of Frankenstein units out there, so it's rather hard to establish what's original and what's not.

author: artag
author_rank: Super Contributor
timestamp: February 27, 2019, 12:30:40 am
content: Maybe it depends where it was shipped - here's the first I found on ebay (it's in italy) and I'm in UK. It has the same branding/colours as mine.https://www.ebay.co.uk/itm/372577597952

author: Mr. Scram
author_rank: Super Contributor
timestamp: February 27, 2019, 12:39:05 am
content: Quote from: artag on February 27, 2019, 12:30:40 am"Seller refurbished" and seller stickers on the case screws. That one may have been tampered with.

author: coromonadalix
author_rank: Super Contributor
timestamp: March 01, 2019, 03:14:15 am
content: sold

author: coromonadalix
author_rank: Super Contributor
timestamp: April 12, 2019, 05:22:53 pm
content: sold