> Feel free to prove mathematically...
>
> Enjoy!
> Glenn ON4WIX
>
> - Original Message -
> From: "Joe Subich, W4TV" <[EMAIL PROTECTED]>
> To: "'Lyle Johnson'" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
> Cc: ; <[EMAIL PROTEC
ON4WIX
>
> - Original Message -
> From: "Joe Subich, W4TV" <[EMAIL PROTECTED]>
> To: "'Lyle Johnson'" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
> Cc: ; <[EMAIL PROTECTED]>
> Sent: Wednesday, June 18, 2008 12:58 AM
> S
Minus 40 degrees :-)
73,
Geoff
GM4ESD
- Original Message -
From: "ON4WIX" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>; "'Lyle Johnson'" <[EMAIL PROTECTED]>;
<[EMAIL PROTECTED]>
Cc: ; <[EMAIL PROTECTED]>
Sent: Wednesday
"Joe Subich, W4TV" <[EMAIL PROTECTED]>
To: "'Lyle Johnson'" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
Cc: ; <[EMAIL PROTECTED]>
Sent: Wednesday, June 18, 2008 12:58 AM
Subject: RE: [Elecraft] K3 - REF CAL Question
F to C is much slower,
No
t;[EMAIL PROTECTED]>
To: "'Lyle Johnson'" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
Cc: ; <[EMAIL PROTECTED]>
Sent: Wednesday, June 18, 2008 12:58 AM
Subject: RE: [Elecraft] K3 - REF CAL Question
F to C is much slower,
Not really ... (F - 30)/2 is ge
... Joe, W4TV
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Lyle Johnson
> Sent: Tuesday, June 17, 2008 5:14 PM
> To: [EMAIL PROTECTED]
> Cc: elecraft@mailman.qth.net; [EMAIL PROTECTED]
> Subject: Re: [Elecraft] K3 - REF CAL Question
>
I will still use F = (1.8 * (C+40)) - 40 -- as I said, I have more
trouble remembering whether to add or subtract the 32.
Similarly, C = (F+40)/1.8 -40, so it is not so complicated after all.
Dividing by 1.8 is similarly easy to do in the head - divide by 2 and
then add 10% of the result - it
Subtract 30 then 2 rather than 32.
Add 30 then 2... It was a test...
73,
Lyle KK7P
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Google works great for this:
Fahrenheit to Celsius
90f in c
Celsius to F:
23c in f
On Jun 17, 2008, at 4:38 PM, Don Wilhelm wrote:
Paul,
You have to do that with your calculator :-) .
I never can remember when to add 32 and when to subtract 32, so I
use a slightly different method whi
You have to do that with your calculator :-)
C to F is fast and easy to do in your head.
The "real" formula is:
F = (1.8 * C) + 32
My mental algorithm is:
double the value,
subtract 10% (round it off, who cares if it is a degree or two off),
add 30,
then add 2 (if you feel the need for the e
Paul,
You have to do that with your calculator :-) .
I never can remember when to add 32 and when to subtract 32, so I use a
slightly different method which relies on the fact that both the F and C
scales coincide at -40 deg.
Add 40 first - then multiply by 5/9 (multiply by 5 and divide by 9) i
On Tue, Jun 17, 2008 at 12:12 PM, Tom Childers, N5GE <[EMAIL PROTECTED]> wrote:
> On Tue, 17 Jun 2008 10:42:53 -0400, [EMAIL PROTECTED] wrote:
>>
>>How do you switch the temperatures to Fahrenheit?
>>
>>Paul N4LCD
I think transistors work in Celsius, while vacuum tubes / valves work
in Fahrenheit.
On Tue, 17 Jun 2008 10:42:53 -0400, [EMAIL PROTECTED] wrote:
>
>
>
>>The technical menu needs to be turned on in order to view the PA temp, etc.
>
>How do you switch the temperatures to Fahrenheit?
>
>Paul N4LCD
>
[snip]
You can't. You have to do the calculation shown on page 51 of the owner's
The technical menu needs to be turned on in order to view the PA temp, etc.
How do you switch the temperatures to Fahrenheit?
Paul N4LCD
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S
Dave and Glenn (ON4WIX),
Thanks - the TECH MD worked. The errata sheet that came with my Owner's
Manual referred to an update to the REF CAL procedure in a future firmware
update and I assumed that it was included in the latest. So much for
assuming :) I'll keep my eyes on the reflector...
73
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