KA9QJG wrote:
> Good Info given, I would like to add My 220 Repeater MICOR Mobile Built By
> Scott, which Works far better then My and many others Expectations, With
> that Said, I put it in My 4 ft Rack Just above the Astron 50 Amp Power
> Supply, I noticed a HUM on the Transmit just before the system Dropped, I
> went back to the Site and raised the Micor about 6 In above the Astron and
> Now Everything sounds Great it Was not a Switching power Supply and Must of
> Been picking up the Hum from the Transformer. I was also told some put the
> Power Supply on the Top of the Rack and the Heat will rise out.
> Happy Repeater Building
>
> Don KA9QJG
Yeah, "Heat rises" is definitely another good general tidbit of
knowledge to think about in any cabinet or rack.
In large computer data centers I've worked in, we even had rules about
which row to blow hot air into... servers racked the wrong way around
would be turned the correct direction so the rows alternated hot/cold,
so the return air vents in the ceiling could do their jobs correctly...
Nate WY0X
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