I have a JetStream JTPS-35 switcher. It has a humongous heat sink inside the box and has a fan that makes some noise when the transceiver is turned on. However, I can't hear it when my Dentron Clipperton L is turned on. The Dentron has an aftermarket Radio Shack fan. The original fan was replaced before 1990 when I bought the amp second hand. It seems that a big enough heatsink for the switching transistors might be counterproductive to the light weight.
I did reduce the fan noise quite a bit by tying the wires that were touching the fan blades to the heat sink with a twistie from a cord that I got with something. Willis 'Cookie' Cooke K5EWJ ________________________________ From: Steve Ellington <[email protected]> To: Paul Christensen <[email protected]>; [email protected] Sent: Sun, May 23, 2010 9:08:25 AM Subject: Re: [Elecraft] Samelex Power Supplies with a K3 Paul....It makes me wonder if they couldn't just put a decent heat sink on those switchers and virtually eliminate the fan or at least make it very rare to ever turn on. I realize they want to keep them small and lightweight and I guess fans are cheap and light but I sure do hate the racket they make! Steve N4LQ ----- Original Message ----- From: "Paul Christensen" <[email protected]> ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
