I came to the same conclusion that these are really nice power supplies, especially for the price on ebay, Though whether they work or not seems to have no relation to what the sellers seem to claim since they rarely know how to test them properly. I'm in the process of verifying, calibrating and repairing my small collection. The really nice thing about them is the fast transient responses and designed for testing mobile devices that need to pull current in pulses. A "poor man's SMU" as discussed on a popular forum. They are based on the 6611C/6612C power supplies that were not designed for the mobile pulses that did have the binding posts. The original 66312A did have the binding posts, but more importantly it has schematics for the main board in its service manual. It had the same 20V/2A specs as the 6612 it is based on. I bought one just so I had a version with schematics. The 663xxB/D models don't have the binding posts but are 45W 15V/3A supplies. D models just have a built in digital volt meter. It is easier to find the D models but since this can only measure one channel at a time the additional DVM is of limited use. 66309B/D has two output 66311B/D has one output 66319B/D has two outputs with battery emulation ,even faster transient response and datalogging 66321B/D has one output with battery emulation ,even faster transient response and datalogging
I do the same as you, I buy old test gear and do videos fixing them, and I agree with you about maintaining what exists and not wasting resources making throw away electronics.
I'm 99% convinced you bought the unit I wanted haha, I was just umming and ahhing over shipping (cost about half the unit) and the thing vanished. A week later I find this video. It's a small world haha
Maybe I just zoned out, but did he ever say which models these were? I only heard him say the mfgrs. and could only make out the Keithley in the video...
Hello, thank you for your work :). I'm wondering, where to find 2nd hand gear at a reasonable price in 2022 ? eBay is really overpriced and I'm not even talking about duty fees if you buy something from outside the EU. Moreover, non functioning devices seem to be difficult to find.
@@GearAcquisitionSyndrome Covid and everything may haven't helped either but yeah that's a pain. So we just have to be patient and wait for the perfect eBay listing I guess :p.
Do I spot 2 Rifa/Kemet paper Y-caps behind the mains power input? The ones in the white casing will last a bit longer than the infamous transparent smoke bombs, but since Y capacitors take care of mains insulation, I'm not sure if you'd want to leave them in, or replace them with polypropylene types.
@@GearAcquisitionSyndrome Hey, nice video, new subscriber. I've got one of these and already mounted the binding posts. It is indeed a reused chassis/front panel. If you checkout the 33120A its an exact match, not two binding posts, but two BNC connections, so you need to do a tiny bit of rework to get the banana binding posts in. Keep up the good work!
@@GearAcquisitionSyndrome thank u. i did that but not that way, also that need some coil for catch power from thin air, if can u tell me, what is the transistor val/some number for ID???
Looks like there are a couple of supercapacitors in there. They were probably charged before the video started and the solder joint completed the circuit.
It's not clever to be cute at the start of your videos. You will lose viewers like me. And we will never subscribe. Start professional and keep it professional if that is your intent. No, I did not watch your video. You put me off with your nonsense at the start. A pity.
@@andymouse I was just being honest. I have a channel of content, of sorts, so I am aware of what creators go through. There is just so much CRAP on here that I try to give useful feedback with no pointless sugar coating. He will thank me one day. After all, it's his channel, not yours.
@@Theineluctable_SOME_CANT Yeah I just checked your channel and its not to my taste as this one isn't to yours but I'm not going to lay into you about it, to be honest I find it a bit bizarre to find "Quail Recycler" a video of a Monitor Lizard eating live prey an odd choice but each to their own.
![เป็นไปได้ไหม - WanMai [Performance Video]](http://i.ytimg.com/vi/Eh5hItD4Mr0/mqdefault.jpg)
I came to the same conclusion that these are really nice power supplies, especially for the price on ebay, Though whether they work or not seems to have no relation to what the sellers seem to claim since they rarely know how to test them properly. I'm in the process of verifying, calibrating and repairing my small collection. The really nice thing about them is the fast transient responses and designed for testing mobile devices that need to pull current in pulses. A "poor man's SMU" as discussed on a popular forum.
They are based on the 6611C/6612C power supplies that were not designed for the mobile pulses that did have the binding posts. The original 66312A did have the binding posts, but more importantly it has schematics for the main board in its service manual. It had the same 20V/2A specs as the 6612 it is based on. I bought one just so I had a version with schematics.
The 663xxB/D models don't have the binding posts but are 45W 15V/3A supplies. D models just have a built in digital volt meter. It is easier to find the D models but since this can only measure one channel at a time the additional DVM is of limited use.
66309B/D has two output
66311B/D has one output
66319B/D has two outputs with battery emulation ,even faster transient response and datalogging
66321B/D has one output with battery emulation ,even faster transient response and datalogging
I do the same as you, I buy old test gear and do videos fixing them, and I agree with you about maintaining what exists and not wasting resources making throw away electronics.
Howdy Defpom !
I have a previous model of the HP system power supply, exact same form factor but does 20V 2A only, it came with two binding posts on the front.
I'm 99% convinced you bought the unit I wanted haha, I was just umming and ahhing over shipping (cost about half the unit) and the thing vanished. A week later I find this video. It's a small world haha
Sorry!
@@GearAcquisitionSyndrome Either way, that was a good video and further reinforces the fact that I should have jumped at that unit haha
@@gummy1204 they occasionally pop up, keep an eye out. Mind you, it's loud
@@gummy1204 thanks!
I got one of this HP months ago. The display was very dim caused by one of the tantalum capacitors in the front panel pcb.
It's all about the model number and options. Some models do have banana jacks on the front, some both, some on the rear. Research your Agilent series.
Maybe I just zoned out, but did he ever say which models these were? I only heard him say the mfgrs. and could only make out the Keithley in the video...
Wait wait, sorry, it's the 236, for the keithley. The psu is in the description. Forgot to mention it.
Hello, thank you for your work :). I'm wondering, where to find 2nd hand gear at a reasonable price in 2022 ? eBay is really overpriced and I'm not even talking about duty fees if you buy something from outside the EU. Moreover, non functioning devices seem to be difficult to find.
Yeah, that's my problem too. There's a number of who drove the price of used test gear very very high.....
@@GearAcquisitionSyndrome Covid and everything may haven't helped either but yeah that's a pain. So we just have to be patient and wait for the perfect eBay listing I guess :p.
@@ledocteurdesbits exactly!
Do I spot 2 Rifa/Kemet paper Y-caps behind the mains power input? The ones in the white casing will last a bit longer than the infamous transparent smoke bombs, but since Y capacitors take care of mains insulation, I'm not sure if you'd want to leave them in, or replace them with polypropylene types.
Stinkbombs maybe, will change them out. Thanks for pointing them out
correction: no front binding posts, I added a breakout panel on the right side
You're right, I'm thinking of mounting two binding posts on the front of the unit
@@GearAcquisitionSyndrome Hey, nice video, new subscriber. I've got one of these and already mounted the binding posts. It is indeed a reused chassis/front panel. If you checkout the 33120A its an exact match, not two binding posts, but two BNC connections, so you need to do a tiny bit of rework to get the banana binding posts in. Keep up the good work!
Thanks a lot!
what is intro LED powering method? anyone have diagram or anything about that? or parts list?
That's up to you to figure out
@@GearAcquisitionSyndrome thank u. i did that but not that way, also that need some coil for catch power from thin air, if can u tell me, what is the transistor val/some number for ID???
Looks like there are a couple of supercapacitors in there. They were probably charged before the video started and the solder joint completed the circuit.
@@mikevandebunt811 no, just two holes in the green mat and some very fine wire
Interesting stuff !...cheers.
Thanks!
Bought one. Let's see what it can do :)
Hehe, may it serve you well for a long time! Also, keysight got free advertisement
@@GearAcquisitionSyndrome Aye lol. but I got mine 2nd hand.. keep the dream alive and all that.
@@twobob same for me, they don't make them anymore sadly
whats the point of the video? got to 4 minutes then gave up
The point was around the 5 minute mark
@@GearAcquisitionSyndrome haha, excellent response
It's not clever to be cute at the start of your videos. You will lose viewers like me. And we will never subscribe.
Start professional and keep it professional if that is your intent.
No, I did not watch your video. You put me off with your nonsense at the start.
A pity.
With an attitude like yours I don't think he needs viewers like you. Just imagine if he told you to phuck off wouldn't that be awesome. 🤣
Check his subscriber count and you will see he's new and trying different styles, give the guy a break.
@@andymouse I was just being honest.
I have a channel of content, of sorts, so I am aware of what creators go through.
There is just so much CRAP on here that I try to give useful feedback with no pointless sugar coating.
He will thank me one day. After all, it's his channel, not yours.
No, i won't, I'll just kindly ask you to watch something else if my channel isn't to your taste.
@@Theineluctable_SOME_CANT Yeah I just checked your channel and its not to my taste as this one isn't to yours but I'm not going to lay into you about it, to be honest I find it a bit bizarre to find "Quail Recycler" a video of a Monitor Lizard eating live prey an odd choice but each to their own.