Some years ago we cooled a PDP11 by putting the fan remote and running a dryer hose to the computer. How about putting the fan in the basement and the rig on the desk where it’s handy?
Chuck Jack KE9UW Sent from my iPhone, cjack > On Jun 1, 2018, at 7:57 PM, Michael Walker <va...@portcredit.net> wrote: > > Bill is correct > > You have to move air to cool down those devices and it takes fans to do > it. Water cooling might work if you wish to modify it. :) > > But, there is no free lunch as was mentioned. Be prepared that any 1500 > watt LMDOS amp requires cooling but since there is no tube, they are built > in smaller boxes, so you get smaller fans that have to move more air. > > The B26 is somewhat quieter I think, but they worked on some things to make > it quieter like extending the fan out the back so there is less disturbed > air when it hits the fan blades. > > They aren't that loud and if were good headphones, you won't notice at all. > > my 2 cents, Mike va3mw > > > On Fri, Jun 1, 2018 at 8:32 PM, Bill Stravinsky via Elecraft < > elecraft@mailman.qth.net> wrote: > >> Rich >> >> You pretty much hit the nail on the head about solid state amps. As they >> say there's no free lunch. Solid state has made great strides in high >> power ampsbut its still solid state and a p/n junction or some form >> thereof. 1500 watts of heat in those junctions has to be cooled down or it >> won't be long before it needsnew parts. >> Depending on your operating habits (contesting, casual, or whatever) there >> will be varying degrees of fan noise. The higher the duty cycle the higher >> thefan requirements. Pick your poison, a small light weight amp easy to >> move around or one you need a fork lift to pick up. I prefer tube amps for >> a few reasonsand have the Acom 2000a (and an Alpha 89 that now sits in the >> living room temporarily) but I'm still glad I got the kpa1500 at least so >> far. >> The kpa sits nicely on top of the Acom without causing the table they sit >> on to crash to the floor in pieces, hi. I'm surprised nobody has made a >> you tube ofthe amp in operation actually. But there are only just over 200 >> of the new amps out there. Good luck with your investigation, Rich. >> BillK3WJV >> >> On Friday, June 1, 2018, 8:00:29 PM EDT, Richard Thorne < >> rtho...@rthorne.net> wrote: >> >> This fan noise issue has me concerned to the point that I’m considering >> cancelling my order. >> >> While the amp won’t 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 I’ve 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 k3...@yahoo.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 va...@portcredit.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 c-haw...@illinois.edu ______________________________________________________________ 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
