[Premium-Rx] HF 2050

[Walter Salmaniw]

At 05:25 PM 6/3/2008, you wrote:
>In a message dated 6/3/2008 7:54:57 P.M. Eastern  Daylight Time, 
>l.strong at mchsi.com writes:
>Recently purchased a Collins  HF2050. Which is the best way to cool the 
>power supply? Muffin pan  pulling  the air from the top or pushing the 
>air from the  bottom?
>
>Regards
>Larry Strong  
>
>
>-  All around best approach is to mount the power  supply separately from the 
>receiver to keep the damaging heat out of the  chassis. 
>    If you don't want to do that, there are several tricks  to cool things 
>down. One thing that will help a lot is  use a variac to  reduce line voltage 
>going into the power supply. Reduce line voltage until just  above the point 
>where it drops out of regulation. This will save many watts of  heat dissipation.
>    Forced-air cooling will work best pushing up cool air  from directly 
>below the power supply. Best idea would be to build a cooling  cabinet with 
>several large holes punched in the bottom with fans mounted in the  bottom forcing 
>air up. Remove the bottom and top covers from the radio to allow  air to flow 
>more freely.
> 
>73 Todd WD4NGG


Larry, if you go back into the archives (the early days), there should be hundreds of messages pertaining to this question, with all sorts of experiments (I know I posted all sorts of temperature vs number of fans/location of fan tables).......Walt Salmaniw, Victoria, BC   (who still owns a single 2050 with the outboarded power supply.