[Boatanchors] Rack mounted equipment handles?

[Charles]

It's very simple brute-force design, just a really big transformer, 
heat-sinked (and fan-cooled) 200A bridge rectifier, and a 220,000 uF 
filter cap. Accessorized with an AC breaker, a DC breaker I'm waiting 
for in the mail, 50V and 150A GE "Big Look" meters, and 3/8" stud 
terminals for connections.

The transformer is this one: https://www.ebay.com/itm/163601824136 and 
there are still six left. Contact the seller if you want one, the 
shipping was actually half of what the ebay calculator said! It's 41 lbs 
before packing. But you can't beat 20 volts at 250 amps RMS (=150 amps 
DC with a bridge). Dual 120v primaries. I'm running it on 240 volts.

The devil is in the details - at this current level, milliohm 
resistances can't be ignored. I used 4 AWG cable throughout, except to 
the filter cap which is 8 ga. (to help the inrush limiting a bit). It 
really should be 4 ga. also, and I'll probably add a soft-start circuit 
at the same time. I might add another 220,000 uF but the ripple isn't 
too bad even as-is.

Here's a pic of the front so far, will post more later. (Waiting to 
final-mount the huge toroid transformer until I get the circuit breaker 
and pilot lamp in, since it's much easier to wire behind the front panel 
without it!)




On 3/16/22 12:01, Mike Bracey wrote:
> Charles,
>
> I'm interested in your p/s. Could you give us details of your design 
> when you have a chance?
>
> 73, Mike
> KE5YTV
>
> On Wednesday, March 16, 2022, 10:34:24 AM CDT, Charles via Boatanchors 
> <boatanchors at mailman.qth.net> wrote:
>
>
> Having nearly completed my boatanchor power supply (24-28 volts
> unregulated at 150 amps), I have some difficulty in moving it due to the
> 50+ lb. weight.
>
> The aluminum rack front panel is 1/4" thick, and I've added diagonal
> struts to the chassis, so the panel can take the weight once installed
> in my rack cabinet. But it would be much easier if I had a pair of
> handles mounted to the front. I've done some searching on ebay and there
> are plenty of equipment handles, but most are small diameter (hard on
> the hands and wrists) and I'd also be concerned that the mounting screws
> would break under the load unless the chassis were held vertically.
>
> Looking for recommendations for hefty handles that also look like they
> belong there and not on a door ;) thanks.
>
>
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