On Thu, 13 Nov 2008 23:42:37 +, David Woolley (E.L) wrote:
>Audio dB are weighted by frequency, so the same power at different
>frequencies will not produce a 0dB difference.
The use of weighting requires another suffix.
>It's more complex than that. Classical music broadcasters need to
>
Jim Brown wrote:
Lots of questions. See some answers interspersed.
On Tue, 11 Nov 2008 18:22:50 -0800, Dick Dievendorff wrote:
I think I usually get that right (along with kHz), but I get confused when I
see dBi, dBm, seemingly dBx for all X. I presume it's a measure of loudness
relative to
ssage-
<> From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]
<> On Behalf Of David Wilburn
<> Sent: Wednesday, November 12, 2008 8:10 AM
<> To: Elecraft Discussion List
<> Subject: Re: [K3] [Elecraft] FLx GN Adding Db gain
<>
<> Could the built in two tone
Could the built in two tone generator be used as an input for this?
Now to download the latest manual and read about the "audio voltmeter"
I did not realize it had. ;)
David Wilburn
NM4M
Craig D. Smith wrote:
I have the full range of filters, from 13 KHz to 200 Hz and found that there
isn
Lots of questions. See some answers interspersed.
On Tue, 11 Nov 2008 18:22:50 -0800, Dick Dievendorff wrote:
>I think I usually get that right (along with kHz), but I get confused when I
>see dBi, dBm, seemingly dBx for all X. I presume it's a measure of loudness
>relative to X, so a dBi is ga
I have the full range of filters, from 13 KHz to 200 Hz and found that there
isn't enough adjustment range to get them all exactly equalized. That is,
with the 2.7 KHz set to 0 (minimum possible) and the 200 Hz set to +8dB
(maximum possible) the 200 Hz was still 2 dB down from the 2.7KHz. So what
At the risk of being pedantic, the correct unit is the deciBel, one
tenth of a Bel, and the correct abbreviation is dB (not Db). The
Bel is a unit of change in loudness and is named after Alexander
Graham Bell. Because the way humans hear is logarithmic (as is our
perception of light), the Bel
@mailman.qth.net
Subject: RE: [K3] [Elecraft] FLx GN Adding Db gain
>There is a table of starting values for each of the crystal filters in the
>K3 Utility Help for the Filter Configuration page.
>Dick, K6KR
Dick I notice that the table from K3 Utility Help (snippet below) does not
show the stoc
>There is a table of starting values for each of the crystal filters in the
>K3 Utility Help for the Filter Configuration page.
>Dick, K6KR
Dick I notice that the table from K3 Utility Help (snippet below) does not
show the stock 2.7 KHz filter. I would guess 0 dB but strange that it wasn't
includ
>What setting
>are most CW operator using?
Here are my K3 filter gain settings that make for mostly seamless
transitions. I did this by ear and looking at AFV.
13 KHz +1 dB
6 KHz +2 dB
2.7 KHz 0 dB
0.5 KHz +6 dB
So I agree that the narrower filters seem to need more than 2 dB gain
adjustm
ick Dievendorff"; elecraft@mailman.qth.net
Subject: RE: [K3] [Elecraft] FLx GN Adding Db gain
hmmm let me try again
the value in the table for the 400 Hz filter is clearly wrong.
or the spec for the filter has changed since the manunal was written
Ken
Thanks to all who responded to this thread. I have K3 1433 with 2.8K and 400
Hz. filters. I boosted the 400 gain from 2 to 6 and the difference was
amazing.
With the NR the CW is now EASILY cleaned up at VERY narrow bandwidths! I
thought it was good before but now I see why contesters and DXer
K3NA wrote:
"I've looked at three 400 Hz filters to date and values do vary from
filter to filter; one of mine required 6 dB gain. Other 8-pole filter
bandwidths also vary a bit as well.
Just measure all the filters in the radio and true up the gains. Don't
need to worry about what the actual
I've looked at three 400 Hz filters to date and values do vary from
filter to filter; one of mine required 6 dB gain. Other 8-pole filter
bandwidths also vary a bit as well.
Just measure all the filters in the radio and true up the gains. Don't
need to worry about what the actually gain numb
Hi Ken,
The 2 dB number is bogus, in my opinion/experience.
At least for me the 2dB recommendation for the 400Hz hit the nail
right on the head. But on the other hand, I am not much of CW man.
vy 73 de toby
--
DD5FZ (ex 4n6fz, dj7mgq, dg5mgq, dd5fz)
K2 #885, K2/100 #3248, K3 #67
Hmm - a conclusion is based on one data point? A compensation of 2dB
was correct in the case of my 400 Hz filter - but that's just
anecdotal too.
Bob NW8L
On Tue, Nov 11, 2008 at 8:40 AM, <[EMAIL PROTECTED]> wrote:
> hmmm let me try again
>
> the value in the table for the 400 Hz filter is clear
hmmm let me try again
the value in the table for the 400 Hz filter is clearly wrong.
or the spec for the filter has changed since the manunal was written
Ken
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FLx GN
I've bought a 400hz eight pole CW filter. Although the manual recommends
1-2 db for a setting, I see that the adjustment can be higher. What setting
are most CW operator using?
I measured the gain change going from 450 Hz to 400 HZ (where the rig
changes from the 2.8 filter to the 400
@mailman.qth.net
Subject: Re: [K3] [Elecraft] FLx GN Adding Db gain
FLx GN
I've bought a 400hz eight pole CW filter. Although the manual recommends
1-2 db for a setting, I see that the adjustment can be higher. What setting
are most CW operator using?
I measured the gain change going from 4
FLx GN
I've bought a 400hz eight pole CW filter. Although the manual recommends
1-2 db for a setting, I see that the adjustment can be higher. What setting
are most CW operator using?
I measured the gain change going from 450 Hz to 400 HZ (where the rig
changes from the 2.8 filter to the 40
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