[Elecraft] XV50, XV144, XV222 Assembly Manual

[Don Wilhelm]

David,

The holes only vent the attenuators, the heat sink for the output module 
is the bottom plate.
Whether the attenuators need venting or not depends on your drive level 
- the attenuators are not used at all for 1 mW input, so if that is what 
you are using, rest easy.

I am curious about why your top cover does not have the holes.  It is 
possible that you received an incorrect cover.  If this was a recent 
purchase, things like that are covered under warranty, contact 
parts at elecraft.com with a brief explanation and you may receive the 
right cover.

73,
Don W3FPR

David Pratt wrote:
> I have just been reading the Transverter XV50, XV144, XV222 Assembly 
> Manual Rev B, March 2006 and notice on page 2 that the top cover has 
> ventilation holes drilled in it.  My XV144 does not have any ventilation 
> holes.
>
> Should I drill some vent holes in the top cover, over the four 
> metal-oxide resistors?  My XV144 does get hot and sometimes trips out if 
> I transmit more than a few minutes. (Presumably F1, the resettable 
> fuse.)
>
> As there is space on the RF Board for a fan, similar to that used on the 
> XV432, I am wondering whether there would be any advantage fitting a 
> 40mm x 40mm fan to the XV144?  Presumably, I would need to drill 
> air-flow holes in the PCB and also in the bottom cover.
>
> 73
>   
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