]
To: 'Lyle Johnson' [EMAIL PROTECTED]; [EMAIL PROTECTED]
Cc: elecraft@mailman.qth.net; [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 generally within 10% and
(F - 32) * 1.1 / 2 is within
Subich, W4TV [EMAIL PROTECTED]
To: 'Lyle Johnson' [EMAIL PROTECTED]; [EMAIL PROTECTED]
Cc: elecraft@mailman.qth.net; [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 generally within 10
Minus 40 degrees :-)
73,
Geoff
GM4ESD
- Original Message -
From: ON4WIX [EMAIL PROTECTED]
To: [EMAIL PROTECTED]; 'Lyle Johnson' [EMAIL PROTECTED];
[EMAIL PROTECTED]
Cc: elecraft@mailman.qth.net; [EMAIL PROTECTED]
Sent: Wednesday, June 18, 2008 7:50 AM
Subject: Re: [Elecraft] K3 - REF
PROTECTED]
To: 'Lyle Johnson' [EMAIL PROTECTED]; [EMAIL PROTECTED]
Cc: elecraft@mailman.qth.net; [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 generally within 10% and
(F - 32
-
From: Joe Subich, W4TV [EMAIL PROTECTED]
To: 'Lyle Johnson' [EMAIL PROTECTED]; [EMAIL PROTECTED]
Cc: elecraft@mailman.qth.net; [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
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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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
manual in
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. :-)
(As
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)
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
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
Subtract 30 then 2 rather than 32.
Add 30 then 2... It was a test...
73,
Lyle KK7P
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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
-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
You have to do that with your calculator
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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