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


david knepper collinsradio at adelphia.net
Fri Apr 6 21:30:27 EDT 2007


What frequency, Peter?

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: "Peter Wittenberg" <k2lrc at k2lrc.com>
To: "'Discussion of AM Radio in the Amateur Service'" 
<amradio at mailman.qth.net>
Sent: Friday, April 06, 2007 8:47 PM
Subject: RE: [AMRadio] Re: GB> AM vs SSB???


> Hi Dave, Howard Mills W3HM and I and a few other fellows have set up an AM
> net at 1700 on weekdays. It is totally informal and whoever is there first
> is the person that calls CQ.  Some times there is no one around do to 
> other
> things going on . When I am ho0me I always try to be on.
> Join us!
> -73- Peter K2LRC
>
> -----Original Message-----
> From: amradio-bounces at mailman.qth.net
> [mailto:amradio-bounces at mailman.qth.net] On Behalf Of david knepper
> Sent: Friday, April 06, 2007 7:50 PM
> To: Discussion of AM Radio in the Amateur Service
> Subject: Re: [AMRadio] Re: GB> AM vs SSB???
>
> 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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