HP Precision 6114A Power Supply on ebay $80 OBO+ shipping.  - Page 1
Forum section: electronics / general

author: PedroDaGr8
author_rank: Super Contributor
timestamp: July 07, 2013, 02:05:04 am
content: Not sold by me, just came across this. I know several people mentioned surprise that I got one for under $100. Here are a few more for those who want it. 0-20V/2A and 20-40V/1A.http://www.ebay.com/itm/HP-6114A-POWER-SUPPLY-/400512144009?pt=LH_DefaultDomain_0&hash=item5d40625289Look to be in pretty good shape. Just need a bit of elbow grease to clean them up. They also have the 10 turn current control. Seller has best offer listed so you can likely get a great supply for under $100. These are high precision supplies.Comparing it to the Power Designs Precision 5020:Front meter accuracy:PD: +/- 3% of full scaleHP: +/- 2% of full scaleLine Regulation:PD: 0.001%+100uVHP: 0.0005% + 100uVLoad Regulation:PD: 0.001% + 100uVHP: 0.0005% + 40uVRipple:PD: 100uVp-p (up to 10MHz)HP: 40uVrms/100uVp-p (up to 20MHz)Output Voltage Accuracy: (basically how does the output match the set value)PD: 0.1% + 0.5mVHP: 0.025% + 1mV (any where in the spec range after a 5 min warm-up)Transient Recovery Time:PD:< 50uSec to recover to within 20mV of set value (for a change of load of 80%)HP:<50uSec to recover to within 10mV of set value (for a change of load of 100%)Constant Current regulation:PD: Doesn't address thisHP: 0.01% + 500uAActually, PD doesn't address the specs for their current feature at all, while the HP goes into a detailed break down of ALL of the aspects.Now we get to the ones people on here love:Drift:PD: 0.001% + 100uV over 8 hours, 1mV per week.HP: 0.0015% + 15uV over 8 hours (after 30 min warm-up), no per week ratingTemperature Coefficient:PD: 0.001% + 50uV per oC (0-45oC) and 0.002% or 100uV whichever is greater from 45oC to 60oCHP: 0.001% + 15uV per oC (0-55oC)This isn't to diss the PD 5020 because both are incredible PSs, just illustrating that this is quite a good one as well.

author: robrenz
author_rank: Super Contributor
timestamp: July 07, 2013, 05:05:39 am
content: Thank you PedroDaGr8

author: PedroDaGr8
author_rank: Super Contributor
timestamp: July 07, 2013, 05:57:41 am
content: Haha, that went fast. The guy had 2 available since late June. I post it on here, and they are both gone within a few hours of my posting it.Cheers man, I'm glad you got one Robenz. I've learned a lot from your videos. As for this supply I absoulutely love mine. These things are cream of the crop for several decades and it shows. The voltages are rock solid stable and it just screams quality inside and out.

author: robrenz
author_rank: Super Contributor
timestamp: July 07, 2013, 01:35:54 pm
content: Thanks again. Believe it or not, I fooled around by making a offer but when one sold I caved in an paid the buy it now price.

author: robrenz
author_rank: Super Contributor
timestamp: July 11, 2013, 12:53:23 pm
content: Arrived yesterday, extremely poor packaging, a single layer cardboard box the same size as the PS with about a half inch of clearance on each end filled with some packing peanuts. A testament to the old HP build quality because it was physically undamaged and still works. Just needs a thorough cleaning and cal.Thanks again PedroDaGr8