EEVblog Electronics Community Forum
Products => Test Equipment => Topic started by: eurofox on August 26, 2013, 05:21:27 am
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Hi,
I can buy an Agilent 6624A for peanuts in perfect condition and mint, cost new about 8500 Euros, I think it is still in production. :-+
To use it for a bench power supply I have to add a box with connector to the front since the 4 outputs are the back :--
I appreciate your advice if you have any experience with this power supply.
eurofox
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i got two. they are built like a tank.
you can add bananas to the front.
the plastic already has pre-drilled holes. simple punch em through and off you go
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i got two. they are built like a tank.
you can add bananas to the front.
the plastic already has pre-drilled holes. simple punch em through and off you go
Thanks for your advice, I just got it for 280 Euros :-DD (I accepted the counteroffer)
eurofox
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That's a reasonable price for europe.
Things to watch out for:
Certain serial numbers have problems with the transformer connections. They use something called magjack. Basically a displacement connector to comtact the windings. These things were problematic in certain serial numbers because they were not crimped with the correct pressure... The solution is to solder the magjacks down.
If your machine has no problems :leave em alone !
Check the big capacitors in the supply. The grey ones sometimes went bad. The blue ones (mallory brand) are ok. These caps are HUGE !
Everything in this supply is huge by the way. The transformer is immense, it's got like 25 individual windings on it. 4 primaries (110/120220/240) 8 secondaries (full and half voltage per output channel) three assist windings per output channel , and two or three assist windings for the processor board.
Each channel has its own processor that uses an optically isolated serial link to the main cpu board.
The mian cpu controls display, gpib and keypad. They use rj11 cables and connectors to interconnect the command channel.
Lemme see if i can find pictures from when i repaired mine... I'll post a walkthrough.
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There's a busted one on bay for $50, seller won't return my email about postage. Says it'll be sent by either fedex or usps. Went and got a quote from both these couriers and its about 500 or so dollars from US to Australia. The thing is supposed to weigh just over 20kg. I recently got something from Texas, 22kg (38lbs) only cost 146, I wish postage costs could be a little more even across the board...
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The problem with the 662x series is they are huge and extremely heavy... this us a 4 unit high 19 inch , deep chassis. with a big honking transformer in the front ( i'd say 1/3 the case is the bloody transformer ! )
These are fully isolated , linear supplies.
They are meant to be bolted in a system rack , powered up , controlled through GPIB and forgotten for the next 40 years ... quitly doing their work...
there is even a version that does not have a front panel. just a power switch and a single LED saying it is 'on'.
you really need local pickup... shiping is no-no , especially international. the shipping will cost more than the machine...
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That's a reasonable price for europe.
Things to watch out for:
Certain serial numbers have problems with the transformer connections. They use something called magjack. Basically a displacement connector to comtact the windings. These things were problematic in certain serial numbers because they were not crimped with the correct pressure... The solution is to solder the magjacks down.
If your machine has no problems :leave em alone !
Check the big capacitors in the supply. The grey ones sometimes went bad. The blue ones (mallory brand) are ok. These caps are HUGE !
Everything in this supply is huge by the way. The transformer is immense, it's got like 25 individual windings on it. 4 primaries (110/120220/240) 8 secondaries (full and half voltage per output channel) three assist windings per output channel , and two or three assist windings for the processor board.
Each channel has its own processor that uses an optically isolated serial link to the main cpu board.
The mian cpu controls display, gpib and keypad. They use rj11 cables and connectors to interconnect the command channel.
Lemme see if i can find pictures from when i repaired mine... I'll post a walkthrough.
Thanks for information :)
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There's a busted one on bay for $50, seller won't return my email about postage. Says it'll be sent by either fedex or usps. Went and got a quote from both these couriers and its about 500 or so dollars from US to Australia. The thing is supposed to weigh just over 20kg. I recently got something from Texas, 22kg (38lbs) only cost 146, I wish postage costs could be a little more even across the board...
Not a problem in my case, is coming from France :)
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What's inside of it - a brief view:
(https://lh5.googleusercontent.com/-EA2ZnESv7to/Ugu3ihiUmgI/AAAAAAAACWI/jC4TVq2dBK8/w1329-h997-no/P1010091.JPG)
(https://lh3.googleusercontent.com/-Xa6y7kemIz4/Ugu3fgwYKpI/AAAAAAAACWA/hPwIZHXKvls/w1329-h997-no/P1010089.JPG)
(https://lh6.googleusercontent.com/-s5qOb3MY2WA/Ugu3ftGruhI/AAAAAAAACV4/H3KUETgwOLA/w1329-h997-no/P1010088.JPG)
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What's inside of it - a brief view:
(https://lh5.googleusercontent.com/-EA2ZnESv7to/Ugu3ihiUmgI/AAAAAAAACWI/jC4TVq2dBK8/w1329-h997-no/P1010091.JPG)
(https://lh3.googleusercontent.com/-Xa6y7kemIz4/Ugu3fgwYKpI/AAAAAAAACWA/hPwIZHXKvls/w1329-h997-no/P1010089.JPG)
(https://lh6.googleusercontent.com/-s5qOb3MY2WA/Ugu3ftGruhI/AAAAAAAACV4/H3KUETgwOLA/w1329-h997-no/P1010088.JPG)
Dakujem Metacolector (yes I can manage with your language, worked 5 year as plant manager in SK) :)
Impressive power supply ..... I will put this on my bench ? :-DD |O
Eurofox
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Gentlemen, is anybody here with available manual to internal bus communication of this machine please ? Thank you.
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You got the newer version. Good !
- The main controller board is surface mounted technology.
- blue capacitors as opposed to grey ones
- the parts on the heatsinks are standard transistors on a vertical circuit board. The original supply had a black hybrid circuit there. If those went kaput it was game over. Cant get those anymore. There is a retrofit kit to change to the loose parts.
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Arrived today :-- :-- :-- :--
Display brokken |O |O |O
I already ask replacement or display change :palm:
eurofox
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That sucks. Bad packaging?
Even without display it's still usable via GPIB, which I'm sure provides access to all features, since this is a system power supply. That does not exactly make for a convenient bench supply, however.
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That sucks. Bad packaging?
Even without display it's still usable via GPIB, which I'm sure provides access to all features, since this is a system power supply. That does not exactly make for a convenient bench supply, however.
It is intend to use on my bench, I double check, I got it from ebay and the shipping was provided with insurance so I should get a solution but in the meantime no power supply since I build my home lab from scratch. :'(
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display from a 3488 should work. you can find those old switch multiplexers for 30 to 40$ on ebay.
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Hello,
in case it helps, I bought a HP 6624A. It arrived with broken display. The display part was: 5181-2813
I replaced it with: 5083-3473 and it work like nothing happened.
I don't know out of which machine it came, but I bought it from ebay seller veehifreq from Finland.
Attaching pictures for your pleasure.
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"you can add bananas to the front. the plastic already has pre-drilled holes. simple punch em through and off you go"
Like to precise this statement. It is based on an article in the web (and maybe on Dave's video also), but not true for the 6624.
The 6624 is a 4x output power supply. There is no space and no holes in the front for the bananas. Here you have to wire from the back connectors to a connecting box.
I am using the 6624 since several years that way. Also the noise of the fan is very loud for a work bench. I would recommend to replaced it by a "silent" type (I used an ebm-papst I had in my inventory).