On Sun, 28 Aug 2005 12:59:40 -0700, Ron D'Eau Claire wrote:
>Are you suggesting that those low frequencies are somehow being distorted
>or causing other problems in the audio I.C. in the K2 before they get to
>the filter?
Distorted no. Causing problems -- well, sort of. We don't transmit that L
Hi Ron.
> Are you suggesting that those low frequencies are somehow being distorted or
> causing other problems in the audio I.C. in the K2 before they get to the
> filter?
I would say: YES.
Ideally, the audio frequency response prior to the compressor should
closely match the IF bandwidth of t
John, KD2BD wrote:
There may be more than just two...
http://www.qsl.net/kd2bd/ksb2.html
It looks like many of us have been down the same road.
As I understand the evolution (having followed it since I built S/N 1289 in
2000):
1) Th
Jim wrote:
So when you use a communications mic, like a Shure 444 or the wildly
overpriced
Heil mics, you're simply compensating for that standard that was wrong in
the
first place! All of these mics have some variation of that peaked response
in
the 2-4 kHz region.
--
As f
--- Francis Belliveau <[EMAIL PROTECTED]> wrote:
> I am now confused by the existence of two different mod's with the same
> goal.
There may be more than just two...
http://www.qsl.net/kd2bd/ksb2.html
It looks like many of us have been down the same road.
73, de John, KD2BD
Visit J
Fran,
I will not say that one is better than the other, but Jim's change only
deals with the mic input itself, while Stewart's change also deals with the
internal behavior of the Speech Compressor chip by changing C31 and resricts
the low frequency fed to the Balanced Modulator by the Speech Compr
On Sun, 28 Aug 2005 13:18:35 -0400, Francis Belliveau wrote:
>I am now confused by the existence of two different mod's with the same
>goal.
>It makes perfect sense to me that I should not be wasting Tx energy on audio
>frequencies as low as 20Hz. Beyond that I am somewhat in the dark.
>Jim Bro
I'm also agree with Fran, at least an explanation from Elecraft about
this mod would be really appreciated.
Le 05-08-28 à 13:18, Francis Belliveau a écrit :
I am now confused by the existence of two different mod's with the
same
goal.
It makes perfect sense to me that I should not be wasti
There seems to be two issues here. One is how the frequency response affects
the speech compressor, and the other is the frequency response that gets
transmitted.
The frequencies transmitted are controlled mainly by the SSB (OPT1) filter.
When properly aligned, the SSB filter (OPT1) bandpass is p
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