[time-nuts] Z3801A Internal A/C Supply ??

[Artek Manuals]

OK if you followed the previous thread on this unit you will remember 
that the front half of my supply the reverse polarity and under/ over 
voltage switch is bad but the DC-DC converter half of the supply is 
good. I initially cut a trace and  rerouted the power input to bypass 
the voltage protection circuit and I am feeding the DC-DC section with 
one of my LAB supplies (Tektronix PS503A) .

Long term I needed to free up the lab supply for other tasks so I set 
about looking for a permanent supply to run the Z3801A. since the 0-60V 
supply I was using to feed the Z3801 48V either killed the Z3801 supply 
when it died or vice versa.. the 0-60V supply was kind of big and clunky 
anyway,

Scrounging around in the junk box I came up with a pair of 19.5V/3amp HP 
laptop supplies which were identical I hooked the outputs of these two 
in series (39V under load at 500ma) which seemed perfect. I have now 
been running the Z3801A off these two for a couple of days now and the 
supplies work fine and are hardly warm to the touch.

  So here is my question These two supplies will fit quite nicely inside 
the Z3801A case. Making the the Z3801A "plug in the wall" AC compatible 
no external supply. Should I be concerned about.....

1) Noise from the supply or the A/C lines now inside the box
2) Heat from the supplies, as I said they are hardly warm to the touch 
after running for two day . I could / probably should measure the case 
temperatures but I suspect they are less than 35C

Thoughts... suggestions..... opinions

Dave NR1DX



-- 
Dave
Manuals at ArtekManuals.com
www.ArtekManuals.com

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