HP 6060B Electronic Load
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- Опубліковано 7 січ 2017
- I recently picked up an HP 6060B electronic load at an auction, along with a HP 6645A lab power supply and a vintage 3455A DVM to add to my collection of vintage HP instruments. These will be used in a power supply test rig, for other restorations. Sure enough, the 6060B did not work. Oh, well, yet another awesome piece of vintage HP gear to repair.
- Наука та технологія
I just bought one of these on an auction and it had the _exact_ same issues yours had! I independently found out the issue then just came across this video and watched it and sure enough, same TVS that died on mine was dead on yours!
Oh, these HP rack lovelies
liked your comment !!!!!!! i enjoyed the old tektronix equipments ! at university 40 years ago i used them when BRAND NEW !!!! ... so they are very dear to me !!
Wow! That’s some seriously nice test equipment there! I like that a lot!
Love watching your stuff, excellent examples of how to isolate problems
Thank you so much for these videos :-) I'm always mesmerized when you open old hardware, its kinda sad when the video gets to an end always hehe, keep up the great work! :)
Awesome pieces of new kit! and great repair.
Drooling... I want that load. I like your array of cable holders on your shelf there. and your wire dispenser rod! I get a lot of great ideas from you, Marc! Seriously though.. that electronic load is what I would call "bad ass".
Nice rig - would love to have the whole setup...
Yesssss this is perfect for my remote desktop purpose! I need one !
Just picked up a still in calibration HP 6060B, wonderful instrument for testing power supplies. I have several power supplies in the lab that I have tested. I use it in conjunction with my HP 3400A to measure noise and ripple. I have a Agilent E3630A and E3611A bench supplies I bought off eBay about a year ago that both appear to still met specification according to my tests.
I like the safety switch hack on the curve tracer so that you don't have to use the cover for the DUT haha I did the same to mine.
The best kind of repairs... you could have just cut it out of circuit, but you found an equivalent stack-up. Going to have to visit your museum sometime.
It was not an equivalent stack-up as his stack-up was 66V and not the 88V it called for but still a very cool idea that works in a pinch and I agree the best kind of repairs indeed he got it to work and very cheaply too that's still awesome as you don't find that kind of on the edge by the seat of your pants engineering anymore.
Made a deathtrap DC power supply with four enormous diodes we pulled out of a PA system. and a bunch of old coils and caps from old heathkits. I decided not to post the video because someone would surely kill themselves trying to copy what I did. The Goal was to maintain jitter free DC with as much current being pulled as possible at a given voltage. eventually cables started melting at around 55v at 14 or so amps. and I ran our of my bag-o-capacitors, decided it wasnt worth dying over. Extreme safety percautions were however taken, with remove variac turnup of thic circuit
Those are nice toys :-0
with a source of this type can I have a voltage of .86v and limit the current to 0.0001A? or the current is adjusted depending on the voltage? I would appreciate your response
Nice repair! Do you know the partnumber of the FETs? I couldn't recognize it in the video. Thank you in advance!
The service doc only gives the HP part number: 1858-0137. From my original hi-res video footage I can barely see a marking that looks like IRF 540. Looking it up, it's a 100V 20A MOSFET with 150W CW peak power dissipation made for paralelling. There are 8 of them in parallel in the machine. So this checks out, an IRF 540 x8 performance would actually make sense for this 60A/60V machine.
CuriousMarc Thank you!
[12:27] 49th week 1995 on that HP chippie.
Is that the NVRAM battery indicator on your spectrum analyzer?
That flashing battery on the HP is just the memory retention battery is a bit low. Mine does that despite a new battery.
Yes it is. I just got the very unusual battery to replace it. It's major surgery. Next video I guess.
@7:34 putting fingers in ears and safety goggles on preparing for a bang haha
Mouser has 87.7v TVS diodes but, incorrect package.
www.mouser.com/Circuit-Protection/TVS-Diodes/_/N-axfz1?P=1ybbvrd
All those fans, it sounds like a Xerox server room! ;)
Oh thanks! They have a 75V 3000W bidi, I think that will work fine with a little adapter. I only had looked at through hole stuff, I guess they don't stock it anymore.
The manufacturer can probably manufacture it, but it's based on demand. Mouser is like Home Depot, they stock what moves, not what you necessarily want.
I am an idiot. I was looking for an exact 88V replacement. But Digikey stocks the 90V one! 5KW, through hole leads, like the original package: www.digikey.com/products/en?keywords=5KP90ALFCT-ND. It's on order. When I install it the instrument should be back to original specs.
If you find the fans in the HP 6645A are a bit loud, they're easily swappable for something with temp control. The used a 60mm fan on a standard 3 pin fan connector but no fan control. My own HP 6632A has imgur.com/a/vgK5E in it but some others have used www.newegg.com/Product/Product.aspx?Item=N82E16811999615 .
+ Compgeke Thanks for the tip!
what circuit do you use to connect the spectrum analyzer?
I am wondering the same :D
I always freak out when I see people scope a computer power supply. A lot of people don't realize the computer power supply is also earth ground referenced like the scope.
The most that would happen is the short circuit protection in the supply would kick in
Wouldn't it hurt the scope though?
This is why you always operate your scope on an insulation transformer with no connection to ground to have it nicely floating.
Please don't. You float device under test, not a scope - you won't accidentally have for example mains voltage on exposed BNCs (or in case of older analog scope even worse - whole metal case). Scopes are designed to be grounded for safety reasons.
Thanks for adding the explanation!
bonjour, vous mesurez quoi exactement avec le spectrum analyzer?
J’essaie de mesurer le spectre de bruit. Mais je n’ai pas fait les maths pour avoir la valeur en “dBm per root Hertz”.
Marc, what auction you buy all this from?
Local auctioneer, auctionbdi.hibid.com/. They also sell on eBay under svcstore.
No se para que sirve peto se ve chido
Hewlett Packard dv1000
Fancy hp power supply no over current led ??