Wiardgroup

Hey Doc (and list),

How's it going? Note that the Elpac Supplies are still very much available.
Go to www.alliedelec.com and search for part number WM071-1950 they
sell for $37 USD.



--- In wiardgroup@yahoogroups.com, "drmabuce" <drmabuce@...> wrote:
>
> Hi Muff
> 
> --- In wiardgroup@yahoogroups.com, "Muff" <muff@> wrote:
> > It would be great if Grant or someone could provide some specs on
> each module estimating the amount of current they use. I know these
> aren't always absolute numbers though, perhaps that is part of the
> concern with posting them. 
> 
> i have yet to see an analog module that did not draw a fluctuating
> quantity of current. Admittedly it's a common* practice to publish a
> current-draw that's an 'average' (sort of like RMS power ratings.)
> Many makers do this and so did Wiard for a time.  
> But a few bad experiences brought Grant to see that publishing
> rule-of-thumb specs in good faith and assuming that everybody with the
> cash to buy a Wiard would also be savvy enough to realize that 'actual
> mileage may vary' was not in his best interest. 
> Like most issues concerning Wiard i find it best to call him on the
> phone and  work things out in a dialogue. i have an envelator with a
> non-standard display and when i called Grant about it's special needs
> , like power-supplies and critical spare parts, he took great pains
> and spent lots of time making sure that not only my questions were
> answered but that i grasped the big picture. This equipped me to
> figure-out a lot of future issues on my own.
> 
>  In the early days of the 300 series, Grant neatly circumvented the
> problem of matching of the module to it's power supply by selling
> those large , very robust, Elpac pro-quality wall-warts ...one for
> each module. So there was plenty of current-headroom on tap for
> everybody in the rack. Sadly Elpac discontinued those redoubtable gadgets.
> and....arguably,  it was overkill , (and it made for a very crowded
> power strip)  but it was a good ounce of prevention against a user who
> powered 9 modules with a single 200ma supply and then held Wiard
> liable for the scorched power-supply chassis.
> 
> avanti!
> -doc
> 
> 
> * but the commonality of the practice muddies the water by creating a
> false conventional perception that current draw is a point rather than
> a line (and a fairly wiggly one at that)
>