开云体育

Hi all,

I got this supply for free, and - man! -? what a fine piece of equipment that is!
I've had many power supplies, but this one beats them all when it comes to effortless melting of lab cables.

Since the unit was functionally OK (although it had a red sticker on it) but extremly dirty inside I decided to take it apart for cleaning and share some pics.
/g/HP-Agilent-Keysight-equipment/album?id=255049

I have more pics, and in hires, if anybody is interested. These HP chassis are quite a pleasure to work with. Very straightforward, no obscure srews or breaking plastics. I find it interesting they used these 64-pin computer-sockets for the power modules. Seems to be reliable. There are some Rifas in the entry and output filter and one on the main board that I replaced. I had a smoking one in a Tek scope some weeks ago.

Only annoying thing is the noisy fan. I wanted to put a temperature controlled one inside, but these are DC fans so I need to tap into the 15V supply. Finally I just swapped the original 110V Papst against an identical 220V. Now its nearly silent but still has a decent airflow, and I did not find any means to heat it up. With 500W on the outputs it consumes 580W, so just 80W to blow outside. I made a wire glow at 2V / 50A, that gave me 200W total consumption for roughly 100W at the outputs.

When idling it consumes 40W, the largest part due to the bleeding resistors of the filter bank.
Typical HP...? See my first topic on the 8645A ;-)

cheers
Martin