]
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
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
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
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
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
I don't seem to be able to get my K3 to go from REF CAL to REF xxC. Tapping
the 1 just changes from A to B. I have the latest firmware and I can't find
anywhere I'm supposed to tell the firmware that I have the 1 ppm oscillator.
Can anyone tell me what I'm missing?
As long as I'm asking, I
Bud, this one crops up from time to time, unfortunately Elecraft haven't
yet implemented the higher stability TCXO calibration routine... So you
can't calibrate it better than 1ppm.
The technical menu needs to be turned on in order to view the PA temp, etc.
73 Dave, G4AON
K3/100 #80
and CU on the bands.
Bud N7CW
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Dave G4AON
Sent: Monday, June 16, 2008 12:08 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] K3 - REF CAL Question
Bud, this one crops up from time to time, unfortunately
17 matches
Mail list logo
