Re: [Elecraft] KPA1500 Power Supply Fan Noise

er supply? Guess we don't >> know at what serial number the change was made? >> >> Mike >> K7PI >> >> >> -Original Message- >> From: elecraft-boun...@mailman.qth.net On >> Behalf Of STEPHEN R ZUMBRUN >> Sent: Saturday, Ju

Re: [Elecraft] KPA1500 Power Supply Fan Noise

al number the change was made? > > Mike > K7PI > > > -Original Message- > From: elecraft-boun...@mailman.qth.net On > Behalf Of STEPHEN R ZUMBRUN > Sent: Saturday, June 27, 2020 16:39 > To: elecraft@mailman.qth.net > Subject: [Elecraft] KPA1500 Power Supply Fan N

Re: [Elecraft] KPA1500 Power Supply Fan Noise

2020 16:39 To: elecraft@mailman.qth.net Subject: [Elecraft] KPA1500 Power Supply Fan Noise Hello, all and Happy Field Day. Say I just wanted to comment about Elecraft service and the help they provided me to make a mod to my KPA1500. My KPA1500 power supply fan was rather noisy. I had seen discu

[Elecraft] KPA1500 Power Supply Fan Noise

Hello, all and Happy Field Day. Say I just wanted to comment about Elecraft service and the help they provided me to make a mod to my KPA1500. My KPA1500 power supply fan was rather noisy. I had seen discussion on the reflector about this so I contacted Doug at Elecraft service. He ask if I coul

Re: [Elecraft] KPA1500 Power Supply Fan Noise

I suspect the reason the power supply fans run at constant speed is that they are part of the Meanwell power supply, and beyond Elecraft's control due to warranty issues, etc. I certainly can't fault Elecraft for using that power supply, as it's cost effective and probably helped get the KPA150

Re: [Elecraft] KPA1500 Power Supply Fan Noise

And my SN 502 is perfectly acceptable, even with the stock fan-ware (is that a word?) 73, Pete N4ZR Check out the Reverse Beacon Network at , now spotting RTTY activity worldwide. For spots, please use your favorite "retail" DX cluster. On 6/11/2019 9:22 AM, Dan Atchis

Re: [Elecraft] KPA1500 Power Supply Fan Noise

How loud is the noise? Can you measure it at all? There are many smart phone apps that are really good. I compared my iPhone to a bench standard and it was off by less 0.5db at most frequencies. Pretty impressive actually. Mike va3mw On Tue, Jun 11, 2019 at 9:49 AM Richard Thorne wrote: >

Re: [Elecraft] KPA1500 Power Supply Fan Noise

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Re: [Elecraft] KPA1500 Power Supply Fan Noise

My KPA1500 s/n 156 had such a problem with PS audible noise.?? It was fixed with two mods available from Elecraft, one a new LED board and another with a resistor addition to the MeanWell power supply output?? The latter was probably not associated with noise but it's an addition that was not o

Re: [Elecraft] KPA1500 Power Supply Fan Noise

. -larry (K8UT) -- Original Message -- From: "eric norris via Elecraft" To: "li...@w2irt.net" ; "li...@w2irt.net" ; "Elecraft Reflector" Sent: 2019-06-10 19:57:02 Subject: [Elecraft] KPA1500 Power Supply Fan Noise More broadly, has there

Re: [Elecraft] KPA1500 Power Supply Fan Noise

Eric -- this is not at all normal! My PSU is quiet...hardly hear it from under the table. I understand Elecraft changed to much quieter fans maybe two years ago. But even so, perhaps the voltage to your fans has soared way to high? I haven't looked at the circuit driving them. Maybe lost regula

Re: [Elecraft] KPA1500 Power Supply Fan Noise

Norris Sent: Tuesday, June 11, 2019 3:47 AM To: Peter Hall Cc: elecraft@mailman qth. net Subject: Re: [Elecraft] KPA1500 Power Supply Fan Noise Apparently I was not clear enough in my message. It is the PSU fan noise that is deafening, not the RF deck. Like Peter, my PSU sits on the floor

Re: [Elecraft] KPA1500 Power Supply Fan Noise

t; Sent: Tuesday, 11 June 2019 7:57 AM > To: li...@w2irt.net; li...@w2irt.net; Elecraft Reflector < > elecraft@mailman.qth.net> > Subject: [Elecraft] KPA1500 Power Supply Fan Noise > > More broadly, has there been any progress on reducing the piercing power > supply fan noise on t

Re: [Elecraft] KPA1500 Power Supply Fan Noise

0m rag-chew" option for those times! 73, Peter (VK6HP). -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of eric norris via Elecraft Sent: Tuesday, 11 June 2019 7:57 AM To: li...@w2irt.net; li...@w2irt.net; Elecraft Reflector Subject: [Elecraft] KPA1500 Power S

Re: [Elecraft] KPA1500 Power Supply Fan Noise

On 6/11/2019 12:20 AM, turnbull wrote: Eric, I do not understand your problem with the PS and audible noise.    The larger fans in my KPA1500 are quiet.   Any noise is at low freq. Do you work keydown modes at high duty cycles, like RTTY contesting or WSJT-X modes where high power is needed (

Re: [Elecraft] KPA1500 Power Supply Fan Noise

via Elecraft Date: 11/06/2019 00:57 (GMT+00:00) To: li...@w2irt.net, li...@w2irt.net, Elecraft Reflector Subject: [Elecraft] KPA1500 Power Supply Fan Noise More broadly, has there been any progress on reducing the piercing power supply fan noise on the KPA1500 when only using it as a tuner or

[Elecraft] KPA1500 Power Supply Fan Noise

More broadly, has there been any progress on reducing the piercing power supply fan noise on the KPA1500 when only using it as a tuner or an antenna switch?  I complained about this a year ago, and I find it completely unacceptable.  No set of noise-reducing headphones that I have tried works we