[Elecraft] Re： K3 2 meter capability: internal K144XV or XV144 transverter?

[Johnny Siu]

Hello Giulio,

The XV144 is not cheap.  It is a great waste if it only uses for SSB/CW.  However, it is really hot even run at 10W FM.

Yes, I do the same and add a small CPU fan.  Where do you take the 12T point?  

cheers,

Johnny VR2XMC



----- 郵件原件 ----
寄件人﹕ Giulio Pico - IW3HVB <iw3hvb at gmail.com>
副本(CC) elecraft at mailman.qth.net
傳送日期﹕ 2009/12/8 (二) 7:31:13 PM
主題： Re: [Elecraft] K3 2 meter capability: internal K144XV or XV144 transverter?

I totally agree with this.
I've too noticed when running the XV144 at more than 10/15 W the xverter 
case get pretty hot.
The Elecraft guys btw are well known to be conservative about component 
choice, keeping well within the safe limits.
On the other hand, just to keep things less hot I'vee added a small cpu 
fan over the top holes (the ones over the attenuator resistors) to drag 
out the hot air.
Since then the case has been a lot less warm even at full output for 
some minutes.
To avoide excessive noise from the fan I've connected the Voltage supply 
for the fan at the 12T point, so it runs only when on tx.

These are my  cents on the matter... :-)

73 de Giulio IW3HVB

AD6XY ha scritto:

Snip
>  Of course the output will be cleaner if under run, so a 25W amplifier
> running 10W ought to be cleaner than when running 25W.
>
>  

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html



      Yahoo!香港提供網上安全攻略，教你如何防範黑客! 請前往 http://hk.promo.yahoo.com/security/ 了解更多!