Quote:
Originally Posted by FireFoxx80
My engineer yesterday did this. Swapped out the old TJ and put in a ntl250, but used the old TJ PSU.
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I had a TJ210 swapped out for an NTL 250 yesterday. I'd read these posts about some engineers using the old 210 psu on the new modem and it struck me as an odd thing to do.
My old 210 psu was quite a small unit that had a normal 2-core mains cable feeding into it. Consequently it was possible to hide it out of the way. It was labelled as having a 12 volt 1 amp output.
My new NTL 250 modem came in a box complete with a psu and stand. Unfortunately the psu is one of those block things built around a mains plug, so it's not as tidy as the old 210 unit. The new supply is rated at 10 volt 1.3 amp.
The output of these supplies is almost certainly unregulated so I suppose using a psu with a nominal 12 volt output instead of the 'proper' one that's rated at 10 volt is OK-ish, but hardly best practice. It all depends on the capabilities of any additional regulation circuitry in the NTL 250.
I'd imagine it's luck of the draw as to whether you get a brand-new complete unit or one that's maybe been used previously and has parted company with its psu and stand.
Mike