Watson Power-Mite-NF smps help please

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26WF183
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Joined: Thursday 22nd Apr 2010, 7:03
First Name: Phil
Location: UK

Watson Power-Mite-NF smps help please

Postby 26WF183 » Thursday 22nd Apr 2010, 7:24

Looking for a little bit of advice on a watson power-mite-nf 22 amp switched mode power supply, I recently dismantled the thing to change the old noisy and sticking cooling fan which was an easy job but on rebuild hit a snag, on the pcb there are two GND- outputs and I cant remember which one was used ( I know make notes next time :doh: ) and as they are not directly linked on the board I dont want to take the risk :(
The first GND- is marked as (BC GND-) on the pcb and the second GND- is marked just as (GND-) one of these pcb terminals is for the negative output connection to the rear binding post with a black wire terminated with a spade end terminal.
Can anybody on this forum please help me with the "which one to use :? ? question" as the supliers and retailers wont for health and safety reasons :x
regards 73s and thanks for reading
Phil

hotshot
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Re: Watson Power-Mite-NF smps help please

Postby hotshot » Sunday 30th May 2010, 22:23

any update here :?:

26WF183
Newbie
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Posts: 2
Joined: Thursday 22nd Apr 2010, 7:03
First Name: Phil
Location: UK

Re: Watson Power-Mite-NF smps help please

Postby 26WF183 » Sunday 30th May 2010, 22:39

Yes here is the update, its now recently sorted and well tested with a large external top fan running a RM KL400 HF amplifier to full power without any problems, I would recomend this mod to anybody with this PSU, remove the little internal heatsink fan, replace the heatsink, open up a hole in the top case (the hardest bit of the mod) and mount a large 12v PC psu cooler fan on top, totaly silent and keeps it cool at slow fan speed.
cheers
Phil.


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