[Elecraft] Unbelievable!

[Igor Sokolov]

Hi Barry,
I suspect your RX noise level there is very low. When I put headphones on 
first thing I hear is 59 + noise on most of the bands. Sure enough I am 
never bothered by fan noise of my K3.
All of the above is said to tell how much I envy you :)

73, Igor UA9CDC

----- Original Message ----- 
From: "Barry Simpson" <vk2bj at optusnet.com.au>
To: "Brian Alsop" <alsopb at nc.rr.com>
Cc: <elecraft at mailman.qth.net>
Sent: Monday, January 23, 2012 1:58 PM
Subject: Re: [Elecraft] Unbelievable!


> Hi Brian
>
> My experience with the KPA500 exactly mirrors yours. After some fairly 
> long
> overs, my fan begins to sound a bit like a vacuum cleaner although nowhere
> near as loud as my former linear, a Yaesu FL7000. I do not find any cause
> for complaint. It is simply a fact of life.
>
> I am also bewildered by people who say they never hear the fan in their 
> K3.
> Mine comes on almost from the start and I can always hear it, even with my
> headphones on.
>
> 73
>
> Barry Simpson  VK2BJ
>
> On 22 January 2012 11:40, Brian Alsop <alsopb at nc.rr.com> wrote:
>
>> Like all things too good to be true, this posting about the KPA500 is a
>> bit unbelievable.  Like cars, YMMV.
>>
>> My experience with the KPA500 is much different.  I suspect Jack only
>> operates SSB.
>>
>> On CW expect the fan to come on after a few transmissions in under 30
>> seconds.  Levels 1, 2 and sometimes 3 are often heard when doing some
>> rag chewing at 500 W.  The temperature stays below 70C as it should.
>> RTTY is about the same with contest type operation.   Expect the fan to
>> operate as designed for these modes.
>>
>> It is not an absolutely quiet fan. I doubt Muffin type fans can be more
>> quiet that what is used on the KPA500.  One would have to go to a
>> centrifugal fan like used on some of the really silent big amps to have
>> it "pin drop" quiet.
>>
>> 73 de Brian/K3KO
>>
>>
>>
>> On 1/21/2012 23:19, Jack Berry wrote:
>>
>> > I'm with you Fred. I wish Elecraft made cars. They would read our 
>> > minds,
>> last for 20 years and get 300 mpg!
>> >
>> > On Jan 21, 2012, at 4:03 PM, Fredric Serota<fserota at msn.com>  wrote:
>> >
>> >> I don't usually say much on these lists. But I have just finished
>> building
>> >> my KPA500, and I have to say that in my almost 50 years of hamming,
>> this is
>> >> the most incredible piece of equipment I have ever had. Now, I am not
>> >> related to Elecraft in any way. They don't even know who I am. But I 
>> >> am
>> so
>> >> impressed with the quality of components and the engineering and 
>> >> thought
>> >> that went in to this little package that I may sell my other amp (name
>> >> starts with the first letter of the Greek alphabet) and buy another. 
>> >> My
>> >> other amp is so noisy, the fan runs so loud and the "QSK" relays
>> >> clickity-clack" when sending CW. The KPA500 is as silent as can be,
>> >> generates over 600 watts without any noise at all. The only time I can
>> hear
>> >> the fan is when I shut down the amplifier, it turns on to bleed the 
>> >> high
>> >> voltage to make it safe if you want to poke inside. No other piece of
>> >> equipment I have ever had does that. It follows the K3 without
>> blinking. And
>> >> the software gives you all the measurements, including temperature,
>> that you
>> >> would ever want to know. And the satisfaction of breaking a pile up 
>> >> with
>> >> half the power I usually run, puts the fun back in operating.
>> >>
>> >>
>> >>
>> >> And all you guys can say is you don't like the color of the buttons.
>> >> Unbelievable!
>> >>
>> >>
>> >>
>> >> Fred Serota, K3BHX
>> >>
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