[Elecraft] XV50 cooling

[Don Wilhelm]

Gentleman,

My promised temperature rise measurements will have to be delayed a 
bit.  This XV50 has a bad power output module and I will have to wait 
for one to be sent from Watsonville.  Later next week, I will have the data.

BTW - Mitsubishi in their notes at the end of the data sheet suggest 
that the module case temperature should be limited to 60 deg/C - but 
that is "too hot to touch" (140 deg/F), so the "excessively hot" 
criteria may actually be well within the limits of tolerance - I would 
not want to hold my hand very long on a surface that is at 60 deg/C.  
Also, I do agree that other components can be affected by the 
temperature rise, but most are spec-ed at 60 deg/C, so in reality, there 
may be no problem, just a "discomfort zone" - details after the new 
module arrives.

73,
Don W3FPR

Don Wilhelm wrote:
> Eric,
>
> Have you actually measured the temperature rise?  I am interested in 
> just how much is "excessively hot".
> While it does get warm, I have always found the temperatures to be well 
> within spec for the output module.
>
> I have an XV50 here for repair right now.  It is next in line for work, 
> and I intend to get to it this weekend.  After it is repaired, I will 
> measure the temperature rise on the bottom panel right under the heat 
> spreader.  I have a Fluke 279 with a temperature probe available.
>
> Report on Monday.
>
> 73,
> Don W3FPR
>
> Eric wrote:
>   
>> I have a late-model xv144 with holes in both top and bottom panels, connected to k3 with milliwatt drive. It runs excessively hot at 10w out in digital mode EME when used one minute on one minute off,  so i dont think  just getting new panels will help you.  I use a small muffin fan blowing air underneath with the xv-144 up on the optional tilt stand and this simple solution works great. 
>>
>> I also use an xv-432 for eme at 10w but its internal fan keeps it cool. 
>>
>> Perhaps if enough people request a retrofit kit with an internal fan for the xv-50 and xv-144 Elecraft would consider it.  I'd pony up. The fan could attach inside the top panel. 
>>
>> 73
>>
>> Eric WD6DBM 
>>
>>   
>>     
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