Don, That was an excellent video and comparison.
Thanks for taking the time to make it and post it. I’m only a few weeks away from shipment and really would like the kpa-1500 in my RF chain. I have a kpa-500 and it’s been an outstanding performer. If the noise ends up being an issue I may consider building a sound barrier wall between my op desk and my exterior wall. Thanks again Don Rich - N5ZC Sent from my iPhone > On Jun 2, 2018, at 7:48 AM, Don Butler <n...@comcast.net> wrote: > > Paul …. The PS noise is minimal from my point of view. The power supply fans > do run continuously while the amp is switched on …. You can hear the PS fans > at the beginning and end of the video when the fan speed is set at “0” .. all > you’re hearing at that time is the PS fan … at power down right at the end > you can hear when the PS fans stop. > > Don, N5LZ > > > Sent from Mail for Windows 10 > > From: Paul Baldock > Sent: Saturday, June 2, 2018 8:38 AM > To: Don Butler; Elecraft@mailman.qth.net > Subject: Re: [Elecraft] KPA1500 Fan Noise Video posted > > Does the power supply make any significant noise? > > - Paul > > At 11:01 PM 6/1/2018, Don Butler wrote: >> In response to N5ZCâs request I just made >> this short video to provide a listen to the >> KPA1500's fans ... at least as they sound in my >> shack. Follow this link to view: >> https://vimeo.com/273064144 In addition to the >> KPA1500 the video also includes footage of my >> Alpha 9500 and Icom PA1 > each running with >> their fans at maximum speed > ⦠to provide a >> simple rather crude comparison. What do I >> think? I think that fan speed 1 and fan speed >> 2 on the KPA1500 are probably comparable to the >> fans that are installed on the other amplifiers >> as far as sound and efficiency are concerned and >> likely provide a similar degree of cooling at >> those speeds. And, I think that fan speeds 3, >> 4, and 5 (which are indeed noisy) provide the >> KPA1500 with enhanced cooling capability that is >> simply not available on other amplifiers. Don, >> N5LZ -----Original Message----- From: >> elecraft-boun...@mailman.qth.net >> [mailto:elecraft-boun...@mailman.qth.net] On >> Behalf Of Richard Thorne Sent: Friday, June 01, >> 2018 5:55 PM To: Elecraft@mailman.qth.net >> Subject: [Elecraft] KPA-1500 Fan Noise - YouTube >> ? This fan noise issue has me concerned to the >> point that Iâm considering cancelling my >> order. While the amp wonât be on my operating >> desk, it will be on a rack next to my operating >> desk. Remoting the amp is not an option. Quite >> frankly I have no interest in remoting the amp. >> Is there anyone out there that has a KPA-1500 >> willing to post a YouTube video so we can hear >> the fan in action and judge the noise for >> ourselves? From the research Iâve done it >> appears that if you want a solid state amp, >> regardless of make, you need to be prepared for >> fan noise. Thanks Rich - N5ZC Sent from my >> iPhone >> ______________________________________________________________ >> Elecraft mailing list Home: >> http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm Post: >> mailto:Elecraft@mailman.qth.net This list hosted >> by: http://www.qsl.net Please help support this >> email list: http://www.qsl.net/donate.html >> Message delivered to n...@comcast.net >> ______________________________________________________________ >> Elecraft mailing list Home: >> http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm Post: >> mailto:Elecraft@mailman.qth.net This list hosted >> by: http://www.qsl.net Please help support this >> email list: http://www.qsl.net/donate.html >> Message delivered to p...@paulbaldock.com > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to rtho...@rthorne.net ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
