HP 6115A PS WTF?  - Page 1
Forum section: electronics / testgear

author: motocoder
author_rank: Unknown
timestamp: May 25, 2015, 11:03:50 am
content: Been watching this eBay sale for awhile. It was listed at $29.99, didn't sell, and now they've dropped it to $19.99.http://www.ebay.com/itm/HP-Agilent-6115A-Precision-Power-Supply-0-50V-8A-50-100V-4A-AS-IS-/201355080615?&_trksid=p2056016.m2516.l5255It's an HP 6115A precision power supply, which would normally be a quick seller at this price even if it's in a bit of rough shape. However, this one has some "features" that I have not seen on other supplies of the same model:First of all, we have a switch labelled "L/R" on the front panel where normally there is no switch. What do you suppose this switch does?Second, we have a BNC jack sticking out of the back terminal block cover. WTF?

author: nctnico
author_rank: Super Contributor
timestamp: May 25, 2015, 11:07:51 am
content: I guess these are some modifications. If the service manual is available you should be able to undo them. But maybe they add a neat feature!

author: PA0PBZ
author_rank: Super Contributor
timestamp: May 25, 2015, 11:12:36 am
content: L/R must be left or right handed operation

author: dom0
author_rank: Super Contributor
timestamp: May 25, 2015, 11:16:18 am
content: The BNC is probably just wired to set one of the regulator parameters and the L/R switch selectslocal orremote (via BNC) control.

author: motocoder
author_rank: Unknown
timestamp: May 25, 2015, 11:16:54 am
content: Quote from: PA0PBZ on May 25, 2015, 11:12:36 amHa ha. Of course!

author: motocoder
author_rank: Unknown
timestamp: May 25, 2015, 11:18:49 am
content: Quote from: dom0 on May 25, 2015, 11:16:18 amThat makes a lot of sense. I bet that you're right.Might not be a bad purchase if anyone is in the mood for a major clean-up and restore. Note that the voltage selection assembly is missing a bezel, so you'll have to fabricate a replacement.

author: SeanB
author_rank: Super Contributor
timestamp: May 26, 2015, 06:52:55 pm
content: Also has a 5335A counter as well, faulty, as is,http://www.ebay.com/itm/HP-Agilent-200MHz-Universal-Counter-5335A-FAIL-5-1-ERROR-/351407584007?pt=LH_DefaultDomain_0&hash=item51d1863307If it had make an offer i would bid........Anybody want a precision voltage source, 6.5 digits, working....... Data Precision 8200http://www.ebay.com/itm/Data-Precision-8200-6-Digit-Voltage-Current-Calibrator-/351405656148?pt=LH_DefaultDomain_0&hash=item51d168c854

author: Vgkid
author_rank: Super Contributor
timestamp: May 26, 2015, 07:04:04 pm
content: The descriptor of a "small fire" has me leary, but i might pull the trigger. Also the missing/ mismatched screws...

author: Vgkid
author_rank: Super Contributor
timestamp: May 29, 2015, 10:41:22 pm
content: Looks like I won it. Crap...

author: eas
author_rank: Frequent Contributor
timestamp: May 30, 2015, 12:29:57 am
content: Quote from: Vgkid on May 29, 2015, 10:41:22 pmHeh...

author: Muxr
author_rank: Super Contributor
timestamp: May 30, 2015, 12:51:13 am
content: Quote from: Vgkid on May 29, 2015, 10:41:22 pmSounds like we will find out more about the mod. Adventure!!

author: motocoder
author_rank: Unknown
timestamp: May 30, 2015, 05:35:00 am
content: Quote from: Vgkid on May 29, 2015, 10:41:22 pmEnjoy! Post some pics on the repair.

author: Vgkid
author_rank: Super Contributor
timestamp: May 30, 2015, 04:10:30 pm
content: Before I saw dom0's post, I was thinking that the L/R was for local/remote as well.

author: Vgkid
author_rank: Super Contributor
timestamp: June 04, 2015, 09:36:33 pm
content: It came today upon first inspection...that is not good.

author: Deathwish
author_rank: Unknown
timestamp: June 04, 2015, 09:44:57 pm
content: Well don't stop there, the suspense is killing us ..

author: Vgkid
author_rank: Super Contributor
timestamp: June 04, 2015, 10:54:36 pm
content: This should hold you over until pics are posted.R3 - 1k ohm 10 watt WW power resistor is split in half...the bnc cable was once connected to two wires.

author: linux-works
author_rank: Super Contributor
timestamp: June 05, 2015, 04:00:44 am
content: I think you guys are wrong about L/R.this thing switches so fast, its good for audio! so, the seller must have had 2 of them and one would be set to LEFT and the other to RIGHT. bet it really 'thumped' back in its day.any idea where the other one is?(lol)