[Elecraft] Cooling Fans

[Tom Doligalski]

I finally had the fans go off sporadically again, while I was monitoring the temperature. At that time conditions were:

Voltage 13.2 V
Current: 1.3 A (second receiver off)
PA 35 C
FP 41 C

This was after the K3 had been “idling” all night, with no transmissions and volume turned down to 0. 

These are also the same values that the K3 normally shows…I am to receive a new thermometer later today, and will be calibrating the K3. 

Strange!

Tom W4KX

> On Jul 19, 2020, at 2:59 PM, Mike Harris via Elecraft <elecraft at mailman.qth.net> wrote:
> 
> Hi,
> 
> FWIW.
> 
> Test conditions measured under the K3 DISP menu:
> 
> 14.1V
> 1.38A Sub RX on
> PA 32C
> FP 40C
> 
> PA fans off
> PA fans on/off at 36C/35C
> 
> Room temp 22C
> 
> K3 FP and PA temp sensors calibrated against a laboratory thermometer adjacent to the K3.
> 
> Never really noticed when the PA fans come on in idle conditions due to PC fan noise.
> 
> Regards,
> 
> Mike VP8NO
> 
> On 19/07/2020 12:15, John Simmons wrote:
> > Tom,
> >
> > Interesting post. I thought this was the case with my K3 also, but i figured out later that it was the fan in my power supply instead. Poor hearing!
> >
> > -de John NI0K
> >
> > Tom Doligalski via Elecraft wrote on 7/19/2020 8:41 AM:
> >> I am the original owner of K3/100 #969, which still works great.
> >>
> >> I’ve noticed that recently the cooling fan comes on occasionally even if the radio is on, but not in use (volume down, no transmitting). FP temperature shows 41 C, and PA temperature is at 35 C
> >>
> >> This is not at objectionable at all, but made me wonder if this was a cause for concern.
> >>
> >> Any ideas?
> >>
> >> Tom W4KX
> 
> On 19/07/2020 12:15, John Simmons wrote:
>> Tom,
>> Interesting post. I thought this was the case with my K3 also, but i figured out later that it was the fan in my power supply instead. Poor hearing!
>> -de John NI0K
>> Tom Doligalski via Elecraft wrote on 7/19/2020 8:41 AM:
>>> I am the original owner of K3/100 #969, which still works great.
>>> 
>>> I’ve noticed that recently the cooling fan comes on occasionally even if the radio is on, but not in use (volume down, no transmitting). FP temperature shows 41 C, and PA temperature is at 35 C
>>> 
>>> This is not at objectionable at all, but made me wonder if this was a cause for concern.
>>> 
>>> Any ideas?
>>> 
>>> Tom W4KX
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at 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 w4kx at mac.com