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leolaw
08-02-2003, 12:44 AM
I have some problems to understand this question see if there anyone who can help me:

The question is T7A16 on the Element 2 test:

If you increase your transmitter output power from 5 watts to 10 watts, what
decibel (dB) increase does that represent?


A) 2 dB

B) 3 dB

C) 5 dB

D) 10 dB
jii_m
08-02-2003, 01:03 AM
B. 3 dB
leolaw
08-02-2003, 01:49 AM
Originally posted by jii_m@2 August 2003 - 01:03
B. 3 dB
How can you get 3?

Don't tell me that you went to ARRL.org to look for the answer lolz

Can you tell me how can you get 3?
3rd gen noob
08-02-2003, 02:30 AM
i remember i did this in physics last year...

if i can be bothered to look out my notes, i might scan them in

truth be told though, it's a bugger of an equation from memory
balamm
08-02-2003, 03:01 AM
http://www-personal.engin.umich.edu/~nzosc...ke/tech2003.txt (http://www-personal.engin.umich.edu/~nzoschke/tech2003.txt)
leolaw
08-02-2003, 03:40 AM
Originally posted by balamm@2 August 2003 - 03:01
http://www-personal.engin.umich.edu/~nzosc...ke/tech2003.txt (http://www-personal.engin.umich.edu/~nzoschke/tech2003.txt)
dude i get the same thing

But i dont wanna just get the answer

I really wanna know why....
balamm
08-02-2003, 06:09 AM
Can't recall, we don't use watts at all except for power consumption. All carried signal is measured in dB in cable.
jii_m
08-02-2003, 01:23 PM
How can you get 3?

Don't tell me that you went to ARRL.org to look for the answer lolz

Can you tell me how can you get 3?

10 log 2 = 3 ?
leolaw
08-02-2003, 08:45 PM
Originally posted by jii_m@2 August 2003 - 13:23

10 log 2 = 3 ?


Why do u use log?
3rd gen noob
08-02-2003, 09:30 PM
Originally posted by leolaw@2 August 2003 - 21:45
Why do u use log?
my handwriting is a little messy...so here's a few scans that might help

they're pretty big though, might take some time to load

1 (http://mysite.freeserve.com/MSchumiFTP/1.JPG)

2 (http://mysite.freeserve.com/MSchumiFTP/2.JPG)

edit: links now inactive, due to space issues...
leolaw
08-02-2003, 09:47 PM
Originally posted by 3rd gen noob+2 August 2003 - 21:30--></div><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (3rd gen noob @ 2 August 2003 - 21:30)</td></tr><tr><td id='QUOTE'> <!--QuoteBegin-leolaw@2 August 2003 - 21:45
Why do u use log?
my handwriting is a little messy...so here&#39;s a few scans that might help

they&#39;re pretty big though, might take some time to load

1 (http://mysite.freeserve.com/MSchumiFTP/1.JPG)

2 (http://mysite.freeserve.com/MSchumiFTP/2.JPG) [/b][/quote]
Thx