Fan speed

[Richard Zalewski]

Is fan speed band dependent as well as temp?  My fan was 0 but when I
switched to 6m it ramped up to 2 immediately.  Usually anything under 45C
no fan but on 6m the fan stayed on until it got to 35C.

Richard
*W7ZR* ex:5C5Z, CN2ZR, K2JSP, W6SBZ, W7KXR, K9ZIJ, W9KNF, W0KDF, W0MQU,
J68ZR, KC6ZR, PJ4/W7ZR, KH2,W7ZR, KH6/W7ZR, V31ZR, VK4AAZ, XE2DV


*Be joyful in hope, patient in affliction, faithful in prayer*
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[Elecraft mailing list]

What device is involved? There are many with fans.

73,
Jack, W6FB

> On May 29, 2019, at 10:17 AM, Richard Zalewski <[hidden email]> wrote:
>
> Is fan speed band dependent as well as temp?  My fan was 0 but when I
> switched to 6m it ramped up to 2 immediately.  Usually anything under 45C
> no fan but on 6m the fan stayed on until it got to 35C.
>
> Richard
> *W7ZR* ex:5C5Z, CN2ZR, K2JSP, W6SBZ, W7KXR, K9ZIJ, W9KNF, W0KDF, W0MQU,
> J68ZR, KC6ZR, PJ4/W7ZR, KH2,W7ZR, KH6/W7ZR, V31ZR, VK4AAZ, XE2DV
>
>
> *Be joyful in hope, patient in affliction, faithful in prayer*
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

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[Richard Zalewski]

Sorry for that...talking about my KPA1500.

Richard
*W7ZR* ex:5C5Z, CN2ZR, K2JSP, W6SBZ, W7KXR, K9ZIJ, W9KNF, W0KDF, W0MQU,
J68ZR, KC6ZR, PJ4/W7ZR, KH2,W7ZR, KH6/W7ZR, V31ZR, VK4AAZ, XE2DV


*Be joyful in hope, patient in affliction, faithful in prayer*


On Wed, May 29, 2019 at 12:38 PM Jack Brindle <[hidden email]> wrote:

> What device is involved? There are many with fans.
>
> 73,
> Jack, W6FB
>
> > On May 29, 2019, at 10:17 AM, Richard Zalewski <[hidden email]>
> wrote:
> >
> > Is fan speed band dependent as well as temp?  My fan was 0 but when I
> > switched to 6m it ramped up to 2 immediately.  Usually anything under 45C
> > no fan but on 6m the fan stayed on until it got to 35C.
> >
> > Richard
> > *W7ZR* ex:5C5Z, CN2ZR, K2JSP, W6SBZ, W7KXR, K9ZIJ, W9KNF, W0KDF, W0MQU,
> > J68ZR, KC6ZR, PJ4/W7ZR, KH2,W7ZR, KH6/W7ZR, V31ZR, VK4AAZ, XE2DV
> >
> >
> > *Be joyful in hope, patient in affliction, faithful in prayer*
> > ______________________________________________________________
> > Elecraft mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:[hidden email]
> >
> > This list hosted by: http://www.qsl.net
> > Please help support this email list: http://www.qsl.net/donate.html
>
>

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[Eric Swartz - WA6HHQ]

The KPA1500 uses a more aggressive fan speed table for 6M, versus the lower HF
bands. In general there is more immediate component heating on 6M for a given
power (especially in the LPF and other areas outside of the PA transistors), so
we start the fans at a lower heatsink temp.

Also, when using very high dissipation modes like FT8 and JT65 on 6M at
1000-1500 W, we strongly recommend setting the minimum fan speed to at least 1
or 2.

73,
Eric
/elecraft.com/
====

On 5/29/2019 1:08 PM, Richard Zalewski wrote:
> Sorry for that...talking about my KPA1500.
>>> On May 29, 2019, at 10:17 AM, Richard Zalewski <[hidden email]>
>> wrote:
>>
>> Is fan speed band dependent as well as temp?  My fan was 0 but when I
>> switched to 6m it ramped up to 2 immediately.  Usually anything under 45C
>> no fan but on 6m the fan stayed on until it got to 35C.
>>
>>

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