New Book of Rules
in [Design]
|
From: jasen on 19 Aug 2006 02:33 On 2006-08-16, Eeyore <rabbitsfriendsandrelations(a)REMOVETHIS.hotmail.com> wrote: > > > jasen wrote: > >> > >> > For voltage or current: >> > 1 dB = factor of 1.25 >> > 3 dB = factor of 1.4 >> > 5 dB = factor of root 10 = 3.2 >> > 6 dB = factor of 2 >> > 10 dB = factor of 3 >> >> eh? 5>10 ? > > 1dB's wrong too ! Tssk tssk ! looks fairly close to the value for 2 x 10^(x/20) 1 1.12 2 1.26 3 1.41 4 1.59 5 1.78 6 2.00 7 2.24 8 2.51 9 2.82 10 3.16 Bye. Jasen
From: jasen on 19 Aug 2006 02:06 On 2006-08-16, Eeyore <rabbitsfriendsandrelations(a)REMOVETHIS.hotmail.com> wrote: > John Larkin wrote: > >> On Wed, 16 Aug 2006 05:43:54 +0100, Eeyore >> <rabbitsfriendsandrelations(a)REMOVETHIS.hotmail.com> wrote: >> >> >The concept of free speech was never designed for the yahoo likes of you >> >who find the free speech of others not to your liking. >> >> Spoken like a genuine Liberal! Thank you for this classic line; I just >> love this sort of reasoning. > > Spammers tend to use the same 'free speech' argument too btw. Fair enough, they email me, I (or rather software which I run) send email their ISP, DNS host, etc... It seems to work OK. Bye. Jasen P.S. the the from address if real if anyone wants a demo :)
From: jasen on 19 Aug 2006 02:12 On 2006-08-16, Phat Bytestard <phatbytestard(a)getinmahharddrive.org> wrote: > On 16 Aug 2006 07:50:29 -0700, bill.sloman(a)ieee.org Gave us: > >>"The short answer is that the best available evidence is that whales >>evolved >>from a terrestrial ancestor that resembled a wolf or hyaena > > Earth's terrestrial mammals evolved from sea creatures, and at NO > time did the process reverse and make a mammalian sea creature from a > terrestrial one. so where di the sea mammals come from... -- Bye. Jasen
From: John Woodgate on 19 Aug 2006 05:12 In message <ec6bc4$i9v$4(a)gonzo.homenet>, dated Sat, 19 Aug 2006, jasen <jasen(a)free.net.nz> writes > x 10^(x/20) > > 1 1.12 > 2 1.26 > 3 1.41 > 4 1.59 > 5 1.78 > 6 2.00 > 7 2.24 > 8 2.51 > 9 2.82 > 10 3.16 My point (marred by stupid errors) was that you can do them in your head. Anyone can make a table to two decimal places, but that isn't user-friendly. With the errors fixed (I hope!): 1 dB = factor of 1.12 3 dB = factor of root 2 = 1.4 5 dB = factor of root(root 10) = 1.8 6 dB = factor of 2 10 dB = factor of 3 If you remember those, you can easily convert all the other integer numbers of dB to ratios or vice versa. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk 2006 is YMMVI- Your mileage may vary immensely. John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
From: Eeyore on 19 Aug 2006 08:10
John Woodgate wrote: > In message <ec6bc4$i9v$4(a)gonzo.homenet>, dated Sat, 19 Aug 2006, jasen > <jasen(a)free.net.nz> writes > > x 10^(x/20) > > > > 1 1.12 > > 2 1.26 > > 3 1.41 > > 4 1.59 > > 5 1.78 > > 6 2.00 > > 7 2.24 > > 8 2.51 > > 9 2.82 > > 10 3.16 > > My point (marred by stupid errors) was that you can do them in your > head. Anyone can make a table to two decimal places, but that isn't > user-friendly. > > With the errors fixed (I hope!): > > 1 dB = factor of 1.12 > 3 dB = factor of root 2 = 1.4 > 5 dB = factor of root(root 10) = 1.8 > 6 dB = factor of 2 > 10 dB = factor of 3 > > If you remember those, you can easily convert all the other integer > numbers of dB to ratios or vice versa. This is very true. It seems to vaguely impress ppl too ! Graham |