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Temperature Sensors

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K5HM

Temperature Sensors

Anyway to get the temperature sensors read out in Fahrenheit?

73,
Ron, K5HM
[hidden email]
www.qrz.com/db/k5hm

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tomb18

Re: Temperature Sensors

Nope
But quick calculation is multply by 2 subtract 10‰ and add 32.
Only way

-------- Original message --------
From: K5HM <[hidden email]>
Date: 21/06/2014 22:29 (GMT-05:00)
To: [hidden email]
Subject: [Elecraft] Temperature Sensors

Anyway to get the temperature sensors read out in Fahrenheit?

73,
Ron, K5HM
[hidden email]
www.qrz.com/db/k5hm

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Don Wilhelm-4

Re: Temperature Sensors

In reply to this post by K5HM

Ron,

Yes, but you have to do a bit of math.
There is a simplified formula that does not require one to remember
whether to add or subtract 32 degrees.
That method has to do with the fact that the two scales coincide at - 40
deg.
So add 40 degrees to the reading (whether that be degF or degC), then if
converting from degF to degC (you want a lower number), multiply by 5
and divide by 9.
If converting from degC to degF (you want a larger number), multiply by
9 and divide by 5.
Lastly subtract 40 and you have the result.

have fun with it.

73,
Don W3FPR

On 6/21/2014 10:29 PM, K5HM wrote:

> Anyway to get the temperature sensors read out in Fahrenheit?
>
> 73,
> Ron, K5HM
> [hidden email]
> www.qrz.com/db/k5hm
>
>
> ______________________________________________________________
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Elecraft mailing list

Re: Temperature Sensors

Don said: “Yes, but you have to do a bit of math.”

…or use one of the most useful pieces of software ever written (for an engineer, anyway), Convert (http://joshmadison.com/). I used it throughout my career which required skills in both metric and imperial systems. Like Morse Code or learning a new language, it gets easy after you do it for a while, but usually conversion isn’t really necessary. All modern electronic components are spec’d in metric. Electronic power and temperatures limits have always been in metric units, even for old tubes, so it makes sense that Elecraft chose to display Deg. C.

Keeping a few key temperatures in mind really helps. Water freezes at 0 deg. C, 20 deg. C is about room temperature, 70 deg. C is uncomfortable to touch, and water boils at 100 deg. C and will definitely hurt to touch. Write this down, keep it in front of you. Get familiar with a few component spec sheets for some of the components in your radio whose temperatures are displayed, and you will soon start thinking in “degrees Celsius”.

Learn, learn, learn. It will keep you young!

Regards,

Mark
ars: KE6BB
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Charlie T, K3ICH

Re: Temperature Sensors

Personally, I can't WAIT until we endorse the metric system. Then we'll
only have ten months so we can completely eliminate those nasty January's
and February's.

Chas

----- Original Message -----
From: "Mark via Elecraft" <[hidden email]>
To: <[hidden email]>
Sent: Saturday, June 21, 2014 11:37 PM
Subject: Re: [Elecraft] Temperature Sensors

> Don said: “Yes, but you have to do a bit of math.”
>
>
>
>
> …or use one of the most useful pieces of software ever written (for an
> engineer, anyway), Convert (http://joshmadison.com/). I used it
> throughout my career which required skills in both metric and imperial
> systems. Like Morse Code or learning a new language, it gets easy after
> you do it for a while, but usually conversion isn’t really necessary. All
> modern electronic components are spec’d in metric. Electronic power and
> temperatures limits have always been in metric units, even for old tubes,
> so it makes sense that Elecraft chose to display Deg. C.
>
>
> Keeping a few key temperatures in mind really helps. Water freezes at 0
> deg. C, 20 deg. C is about room temperature, 70 deg. C is uncomfortable to
> touch, and water boils at 100 deg. C and will definitely hurt to touch.
> Write this down, keep it in front of you. Get familiar with a few
> component spec sheets for some of the components in your radio whose
> temperatures are displayed, and you will soon start thinking in “degrees
> Celsius”.
>
>
> Learn, learn, learn. It will keep you young!
>
>
>
>
>
> Regards,
>
>
> Mark
> ars: KE6BB
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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> This list hosted by: http://www.qsl.net
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Kevin Stover

Re: Temperature Sensors

In reply to this post by Elecraft mailing list

I ditto the use of Convert.
It's not just for engineers.

On 6/21/2014 10:37 PM, Mark via Elecraft wrote:

> Don said: “Yes, but you have to do a bit of math.”
>
>
>
>
> …or use one of the most useful pieces of software ever written (for an engineer, anyway), Convert (http://joshmadison.com/). I used it throughout my career which required skills in both metric and imperial systems. Like Morse Code or learning a new language, it gets easy after you do it for a while, but usually conversion isn’t really necessary. All modern electronic components are spec’d in metric. Electronic power and temperatures limits have always been in metric units, even for old tubes, so it makes sense that Elecraft chose to display Deg. C.
>
>
> Keeping a few key temperatures in mind really helps. Water freezes at 0 deg. C, 20 deg. C is about room temperature, 70 deg. C is uncomfortable to touch, and water boils at 100 deg. C and will definitely hurt to touch. Write this down, keep it in front of you. Get familiar with a few component spec sheets for some of the components in your radio whose temperatures are displayed, and you will soon start thinking in “degrees Celsius”.
>
>
> Learn, learn, learn. It will keep you young!
>
>
>
>
>
> Regards,
>
>
> Mark
> ars: KE6BB

K5HM

Re: Temperature Sensors

Thanks for all the helpful suggestions. Yes, I learned all the temperature conversion formulas in high school chemistry.

Unfortunately, I don't live in the metric universe, I just visit it.

With all the complicated things the K3 firmware does, it seems that Celsius to Fahrenheit would be an easy and convenient feature to have.

73,
Ron, K5HM
[hidden email]
www.qrz.com/db/k5hm
-----Original Message-----
From: Elecraft [mailto:[hidden email]] On Behalf Of Kevin Stover
Sent: Sunday, June 22, 2014 8:12 AM
To: [hidden email]
Subject: Re: [Elecraft] Temperature Sensors

I ditto the use of Convert.
It's not just for engineers.

On 6/21/2014 10:37 PM, Mark via Elecraft wrote:

--
R. Kevin Stover
AC0H
ARRL
FISTS #11993
SKCC #215
NAQCC #3441

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hf4me

Re: Temperature Sensors

In reply to this post by Charlie T, K3ICH

I understand the metric system. I have to convert everything. My mind has been in OUR system for 70 years and doesn't visualize anything until I convert it. Additional comments withheld .

I don't force you to do anything my way so why do you try to force me to do things your way?

Too old for this xxxx.
73, Jim KG0KP

-----Original Message-----
From: Elecraft [mailto:[hidden email]] On Behalf Of Charlie T, K3ICH
Sent: Sunday, June 22, 2014 6:28 AM
To: [hidden email]
Subject: Re: [Elecraft] Temperature Sensors

Personally, I can't WAIT until we endorse the metric system. Then we'll only have ten months so we can completely eliminate those nasty January's and February's.

Chas

----- Original Message -----
From: "Mark via Elecraft" <[hidden email]>
To: <[hidden email]>
Sent: Saturday, June 21, 2014 11:37 PM
Subject: Re: [Elecraft] Temperature Sensors

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Phil Hystad-3

Re: Temperature Sensors

Knowing the formulas for conversion means that you can do them in your head. The arithmetic is easy.

Actually, the arithmetic is trivial if you allow a slight error in your result. Formula for going from F degrees to C degrees is:

C = 5/9 * (F - 32)

Or, five-ninths of result of subtracting 32 from F degree reading. But, 5/9th is close to 5/10ths for rough, in the head, calculations and 5/10ths is 1/2 or one-half.

So, to convert degrees F to degrees C you do the following: subtract 32 then divide the result by 2.

Easy to do in your head quickly even while carrying on a QSO with someone in Celsius land. Example, your outdoor temperature is 85 degrees F (meaning, you don't live in the Seattle area) so you subtract 32 to get 53 and divide by 2 which is 27.5 degrees. The actual value is 5/9th instead of 1/2 (5/10ths) so the correct C reading of 85 degrees F is: 29.44 (and, not many of us can feel the difference in temp of just 2 degrees).

You can even get used to the idea of adding in a fudge factor due to the error in the calculation that might range from 1 to 3 degrees depending on the range of the F value. The actual error is close 6 percent (that is, result is ~6 percent too small using this trick) so just remember the 6 percent fudge factor).

For C to F just do the opposite: double your C temp value and add 32.

73, phil

On Jun 22, 2014, at 7:30 AM, Jim Miller <[hidden email]> wrote:

> I understand the metric system. I have to convert everything. My mind has been in OUR system for 70 years and doesn't visualize anything until I convert it. Additional comments withheld .
>
> I don't force you to do anything my way so why do you try to force me to do things your way?
>
> Too old for this xxxx.
> 73, Jim KG0KP
>
> -----Original Message-----
> From: Elecraft [mailto:[hidden email]] On Behalf Of Charlie T, K3ICH
> Sent: Sunday, June 22, 2014 6:28 AM
> To: [hidden email]
> Subject: Re: [Elecraft] Temperature Sensors
>
> Personally, I can't WAIT until we endorse the metric system. Then we'll only have ten months so we can completely eliminate those nasty January's and February's.
>
> Chas
>
>
> ----- Original Message -----
> From: "Mark via Elecraft" <[hidden email]>
> To: <[hidden email]>
> Sent: Saturday, June 21, 2014 11:37 PM
> Subject: Re: [Elecraft] Temperature Sensors
>
>
>> Don said: “Yes, but you have to do a bit of math.”
>>
>>
>>
>>
>> …or use one of the most useful pieces of software ever written (for an
>> engineer, anyway), Convert (http://joshmadison.com/). I used it
>> throughout my career which required skills in both metric and imperial
>> systems. Like Morse Code or learning a new language, it gets easy after
>> you do it for a while, but usually conversion isn’t really necessary. All
>> modern electronic components are spec’d in metric. Electronic power and
>> temperatures limits have always been in metric units, even for old tubes,
>> so it makes sense that Elecraft chose to display Deg. C.
>>
>>
>> Keeping a few key temperatures in mind really helps. Water freezes at 0
>> deg. C, 20 deg. C is about room temperature, 70 deg. C is uncomfortable to
>> touch, and water boils at 100 deg. C and will definitely hurt to touch.
>> Write this down, keep it in front of you. Get familiar with a few
>> component spec sheets for some of the components in your radio whose
>> temperatures are displayed, and you will soon start thinking in “degrees
>> Celsius”.
>>
>>
>> Learn, learn, learn. It will keep you young!
>>
>>
>>
>>
>>
>> Regards,
>>
>>
>> Mark
>> ars: KE6BB
>> ______________________________________________________________
>> 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
>> Message delivered to [hidden email]
>
> ______________________________________________________________
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> Post: mailto:[hidden email]
>
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>
>
> ______________________________________________________________
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Brian Hunt

Re: Temperature Sensors

In reply to this post by hf4me

I don't see that it matters. If you learn the normal operating temperatures of your K3 in C then knowing those numbers in F doesn't add any information. If the normal PA temp is 55C during a contest and you see it at 60C then you know you should back off a bit.

The only time you need to convert is when you calibrate the temp sensors.

73,
Brian K0DTJ

> On Jun 22, 2014, at 7:30, "Jim Miller" <[hidden email]> wrote:
>
> I understand the metric system. I have to convert everything. My mind has been in OUR system for 70 years and doesn't visualize anything until I convert it. Additional comments withheld .
>
> I don't force you to do anything my way so why do you try to force me to do things your way?
>
> Too old for this xxxx.
> 73, Jim KG0KP
>
> -----Original Message-----
> From: Elecraft [mailto:[hidden email]] On Behalf Of Charlie T, K3ICH
> Sent: Sunday, June 22, 2014 6:28 AM
> To: [hidden email]
> Subject: Re: [Elecraft] Temperature Sensors
>
> Personally, I can't WAIT until we endorse the metric system. Then we'll only have ten months so we can completely eliminate those nasty January's and February's.
>
> Chas
>
>
> ----- Original Message -----
> From: "Mark via Elecraft" <[hidden email]>
> To: <[hidden email]>
> Sent: Saturday, June 21, 2014 11:37 PM
> Subject: Re: [Elecraft] Temperature Sensors
>
>
>> Don said: “Yes, but you have to do a bit of math.”
>>
>>
>>
>>
>> …or use one of the most useful pieces of software ever written (for an
>> engineer, anyway), Convert (http://joshmadison.com/). I used it
>> throughout my career which required skills in both metric and imperial
>> systems. Like Morse Code or learning a new language, it gets easy after
>> you do it for a while, but usually conversion isn’t really necessary. All
>> modern electronic components are spec’d in metric. Electronic power and
>> temperatures limits have always been in metric units, even for old tubes,
>> so it makes sense that Elecraft chose to display Deg. C.
>>
>>
>> Keeping a few key temperatures in mind really helps. Water freezes at 0
>> deg. C, 20 deg. C is about room temperature, 70 deg. C is uncomfortable to
>> touch, and water boils at 100 deg. C and will definitely hurt to touch.
>> Write this down, keep it in front of you. Get familiar with a few
>> component spec sheets for some of the components in your radio whose
>> temperatures are displayed, and you will soon start thinking in “degrees
>> Celsius”.
>>
>>
>> Learn, learn, learn. It will keep you young!
>>
>>
>>
>>
>>
>> Regards,
>>
>>
>> Mark
>> ars: KE6BB
>> ______________________________________________________________
>> 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
>> Message delivered to [hidden email]
>
> ______________________________________________________________
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>
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>
>
> ______________________________________________________________
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Kevin Stover

Re: Temperature Sensors

In reply to this post by Phil Hystad-3

I think the temp presentation on the K3 is just fine.
The temp limits for the finals are expressed in degrees C in the
Elecraft docs and the device spec sheets.
Why convert?

--
R. Kevin Stover
AC0H
ARRL
FISTS #11993
SKCC #215
NAQCC #3441

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Bob-270

Re: Temperature Sensors

In reply to this post by Kevin Stover

Here is an online converter that has satisfied my needs:

http://www.worldwidemetric.com/Measurements.html

At least I can still do the MHz to MC conversion without looking it up. It
will in my mind always be MC.

73,
Bob
K2TK ex KN2TKR (1956) & K2TKR
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k6dgw

Re: Temperature Sensors

In reply to this post by Elecraft mailing list

Alas, we are still inching our way to metric.

73,

Fred K6DGW
- Northern California Contest Club
- CU in the 2014 Cal QSO Party 4-5 Oct 2014
- www.cqp.org

On 6/21/2014 8:37 PM, Mark via Elecraft wrote:
> Don said: “Yes, but you have to do a bit of math.”

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jeff stai-2

Re: Temperature Sensors

On Sun, Jun 22, 2014 at 10:03 AM, Fred Jensen <[hidden email]> wrote:

> Alas, we are still inching our way to metric.
>

Yeah. If you give them a centimeter they'll take a kilometer.

The easiest way I know if in your head doesn't work for you, go to
google.com and type

55c to f

and enter in the search box. Done. 73 jeff wk6i

--
Jeff Stai ~ [hidden email]
Twisted Oak Winery ~ http://www.twistedoak.com/
Facebook ~ http://www.facebook.com/twistedoak
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Jeff Herr

Re: Temperature Sensors

In reply to this post by K5HM

the temp specs for the chips are all in centigrade.

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Phil Hystad-3

Re: Temperature Sensors

On Jun 22, 2014, at 12:06 PM, Jeff Herr <[hidden email]> wrote:

> the temp specs for the chips are all in centigrade.

In science and engineering, the "most correct" scale to use is Celsius. This was established in the 1950s by a standard naming the Celsius scale as being the Kelvin (absolute temperature) scale minus 273.15. If you compare the old centigrade scale to Celsius they differ in terms of the value of freezing point versus triple point of water.

The original Celsius scale was actually the reverse of the centigrade scale where 100 was freezing point of water and 0 was boiling point of water. But, after the death of Anders Celsius, the end points were reversed to match the centigrade and the two scales were the same until the 1950s when they received slightly different definitions with the meaning of the 0 measure on the scale.

73, phil, K7PEH*

* more of a physicist than an engineer.
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Elecraft mailing list

Re: Temperature Sensors

In reply to this post by jeff stai-2

Actually, I believe the saying goes "Give em 2.54 CM an they'll take 1.609344 Kilometers."

73 de Dennis KD7CAC
Scottsdale, AZ

On Jun 22, 2014, at 11:56 AM, Jeff Stai <[hidden email]> wrote:

> On Sun, Jun 22, 2014 at 10:03 AM, Fred Jensen <[hidden email]> wrote:
>
>> Alas, we are still inching our way to metric.
>>
>
> Yeah. If you give them a centimeter they'll take a kilometer.
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