RE: [Elecraft] an as-yet undetailed (that I can see) K3 spec
I wish there was a good way to know what the fans sound like in the K3/100. They sound the same on as when they are off, unless you really are in an anechoic chamber. They are incredibly quiet, so much so that I thought they weren't working and had to go around behind the rig to verify the blades were turning, even at the highest speed. By contrast, the ProIII I have currently sitting next to the K3 has very audible fan noise, sometimes even detectable with headphones on. This isn't an analytical answer, and yes with the right equipment you could detect a dB level, but trust me, fan noise is not an issue with the K3. 73, Ed - W0YK ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] an as-yet undetailed (that I can see) K3 spec
I wish there was a good way to know what the fans sound like in the K3/100. They sound the same on as when they are off, unless you really are in an anechoic chamber. They are incredibly quiet, so much so that I thought they weren't working and had to go around behind the rig to verify the blades were turning, even at the highest speed. By contrast, the ProIII I have currently sitting next to the K3 has very audible fan noise, sometimes even detectable with headphones on. This isn't an analytical answer, and yes with the right equipment you could detect a dB level, but trust me, fan noise is not an issue with the K3. --- Ed, thanks, that IS **exactly** what I wanted to know. --- Your ready comparison with a known noise source is the gold standard for me. --- Very much appreciated! --- I'm sure we will eventually see an SPL spec from Aptos, along with more --- operational details of the cooling system / theory of operation as time goes on. --- gl 73 de Steve KZ1X/4 Luggage? GPS? Comic books? Check out fitting gifts for grads at Yahoo! Search http://search.yahoo.com/search?fr=oni_on_mailp=graduation+giftscs=bz ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] an as-yet undetailed (that I can see) K3 spec
Hi Steve: I wish there was a good way to know what the fans sound like in the K3/100. For MOST conditions, they don't sound like ANYTHING... they're virtually silent! This afternoon I did some CWRTTY at 100W output, and for 5-6 minutes at a stretch... the fans cycled up to speed 3 or maybe 4 (top speed). I was able to tell they were running, but there was NEVER any indication of a whirlwind, or anything such as you might expect.. . I placed my hand over the vent holes on the top cover and there was quite a bit of (COOL) air coming out, so I was able to confirm that they were running at a relatively high setting, though the sound was truly minimal... Beyond issues of visual/tactile UI (which has been nearly beat to death), one of the things that bothers me about many rigs is the racket they make. TenTec has that down; no fan needed except for high-duty-cycle modes, and my own personal experience shows that this is really not needed. This is one big reason I'm leaning towards replacing my (fairly noisy) almost 8 year old K2/100 with an Omni VII. I really didn't like the constant fan noise from the Icom 756proII I had and the proIII is no better; the '756 receivers are not at par so they are out of the picking. I don't 'do' Yaesu even if they had a decent rig, and Kenwood doesn't have a rig that is worth buying, either. The new FlexRadio fan sounded VERY loud to me (at Dayton!!), and I don't fancy a radio without knobs anyway. I modified my PC to all but eliminate the noise it makes. So I do have a quiet shack and I like it that way. I don't wear headphones. At Dayton, the din of the room made it hard to hear Wayne talk, much less hear the K3. So ... Are there two fans on the K3, or just on the K3/100? NO fans on the QRP K3... two fans on the KPA3 (100W PA) blowing directly onto the heatsink. When do the two fans come on? Do they both run together, or sometimes just one? If just one, does the other spin freely? Is the speed variable? If so, how is it controlled? Can you set the trip points for when they (each or both) come on and off, or speed up and slow down? Can you set it so the fan doesn't come on at all in QRP 'mode' ? Both fans run at the same time WHEN they run. They are set to come on at preset (in firmware, NOT user settable) heatsink temperatures. There are four (4) speeds... I never hear the first two speeds at all (my shack's pretty quiet as well), and I can usually just tell when speed 3 kicks in. Speed 4 is discernable, but certainly not objectionable at all. 73, Tom Hammond N0SS ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] an as-yet undetailed (that I can see) K3 spec
On Sat, Sep 22, 2007 at 02:17:06PM -0700, Steve Jackson wrote: Are there two fans on the K3, or just on the K3/100? Two. When do the two fans come on? Either when the PA gets hot enough or you can turn them on a constant speed. Do they both run together, or sometimes just one? Both. Is the speed variable? Yes. If so, how is it controlled? By menu setting or temperature. Can you set it so the fan doesn't come on at all in QRP 'mode' ? Yes. I have never heard them. Tree ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
