[AMRadio] Re: GB> AM vs SSB???


david knepper collinsradio at adelphia.net
Fri Apr 6 19:49:51 EDT 2007


Is 3805 Khz a new AM calling frequency?

I heard an AMer get bounced about operating there.


Dave, W3ST/W3CRA
Publisher of the Collins Journal
Secretary to the Collins Radio Association
www.collinsra.com - the CRA Website
Now with PayPal
CRA Nets: 3.805 Mhz every Monday at 8 PM EDST
and 14.253 Mhz every Saturday at 12 Noon EDST
Collins Chatroom - Daily at 4 PM EDST on 7.208  Mhz
----- Original Message ----- 
From: "Grant Youngman" <nq5t at tx.rr.com>
To: "'Discussion of AM Radio in the Amateur Service'" 
<amradio at mailman.qth.net>
Sent: Friday, April 06, 2007 7:43 PM
Subject: RE: [AMRadio] Re: GB> AM vs SSB???


>> The main reason ssb will sound better on a collins than on some of the
>> cheaper rigs is that their audio chain has 1% distortion instead
>> of the usual 10% distortion, and they also use a decent loudspeaker.
>
> Actually, I've never thought Collins SSB sounded all that terribly good.
> The KWS-1 has a bit wider transmit filter than the other usual suspects, 
> but
> in general, the transmit bandwidth is too narrow.  There are important 
> audio
> queues in both the low end and high end (up to 4Khz or so) speech spectrum
> that are completely missing.  This isn't just a Collins problem -- I'm not
> singling them out to pick on.  And the typical receiver, with it's shiny 
> 2.1
> Khz mechanical filter or equivalent, chops those important queues out even
> if they were being transmitted.
>
> I am not a proponent (nor opponent, either) of high fi SSB, but you don't
> have to go too far beyond what is the politically correct norm to get a
> signal that can actually be well understood (per Bacon's point).
>
> And of course there are other factors -- tuning errors, distortion 
> products,
> a heavy hand on the "processing" control, what-have-you.  AM signals can 
> be
> mushy and hard to understand, too.
>
> Grant/NQ5T
>
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