It is amazing that so few hams have not been eliminated by "Natural
Selection" doing stupid stuff.
I know I have done my share of hazardous HV RF experiments during my
younger years. I am more
careful today.
73
Bill wa4lav
At 02:05 PM 3/13/2003 -0500, Tom Rauch wrote:
> > Hi folks,
> > I just found a very nice Amp Supply LK500ZB for sale. It has a pair of
> > new graphite 3-500Z tubes and an outboard case-mounted Peter Dahl
> > transformer. The original internal transformer is still good and still
> > inside, but disconnected. The external transformer is significantly
>larger.
> > FWB design, pretty good regulation, and it will make 1400 watts with 100w
>of
> > drive. It uses a split-chassis cooling system a-la-SB220 which seems quite
> > effective.
>
>I'd be REALLY careful with an external power transformer!!!
>
>You not only have the leads to worry about, you have the power transformer
>case. Be absolutely positive the transformer case is securely grounded to
>the amp chassis, and that the ground connection is failure safe and large.
>Also be sure the mains neutral or safety ground is properly grounded to that
>case.
>
>I've seen far too many homebrew amp add-ons that are very unsafe because the
>builders did not properly ground external transformer boxes, or even used
>proper HV connectors. I'd hate to see anyone get killed or hurt because of
>stupid mistake someone else did before selling the amp.
>
>73 Tom
>
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