[Elecraft] Re： XV50 cooling

[Johnny Siu]

Hello Don,

The situation is - after I operate either XV144 or XV50 for a 10-15 minutes QSO under 10w FM or 20 w SSB (the advertised rated output from Elecraft, p.3 of the owner's manual), the bottom plate (or even one of side panels) is too hot to be touched.  

I would be very interested in your findings and fully appreciate your knowledge of Elecraft products. After your test, I would be grateful if you could advise, it is all ok to operate the XV50 / XV144 under Elecraft's rated output WITHOUT the need of any modifications to remedy the heat issues.

It would be of great assistance if you could give your advice about the maximum length of any QSO under the rated output.  In other words, say for example, I should not use the XV50 / XV144 for any QSO longer than 15 minutes.  Or, there should be 5 minutes cooling time between each 15 minutes QSO etc.

Thanks a lot in advance and look forward to your results.

73

Johnny VR2XMC



----- 郵件原件 ----
寄件人﹕ Don Wilhelm <w3fpr at embarqmail.com>
收件人﹕ Eric <gliderboy1955 at yahoo.com>
副本(CC) "Elecraft at mailman.qth.net" <Elecraft at mailman.qth.net>
傳送日期﹕ 2010/6/4 (五) 7:18:59 AM
主題： Re: [Elecraft] XV50 cooling

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 
>
>