[Kenwood] wider transmit SSB audio TS 480

Tue May 5 10:03:16 EDT 2009

Amateur is NOT out to 6Kc.  The TOTAL bandwidth is 6Kc.  There is 3Kc in 
EACH sideband.  This is VERY different than SSB which is Single Side 
Band.  AM is Double Side Band with carrier.

AM output has the audio output split into TWO sidebands.

Let's NOT start the AM vs. SSB flames on the list, please!  There is 
enough grief on the air.

Bob - N0DGN

Cyrus Turner wrote:
> Joe ,
>  You might find the answers you are looking for on the Yahoo ESSB group. And for what it's worth, Rob isn't lecturing. He is expressing his opinion like the rest of you are doing.  And if the human ear doesn't hear anything out past 2.7 or 3 KHz. Why is it that all stereo systems manufactured have a range of 20Hz -25 Khz  or greater???  Not to mention Amateur AM broadcast is out to , what 6 KHz. I guess we are only imagining those highs and lows Rob and don't really hear them... hi hi  Just my nickels worth.  
>
>  =============[ Howdy from the lil shack on the prairie W5DXE "DiXiE Radio" ]============   
>                                                                                                                             
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>> Date: Tue, 5 May 2009 06:36:16 -0700
>> From: ppagel at sbcglobal.net
>> To: wf2u at ws19ops.com; k5uj at sbcglobal.net
>> CC: kenwood at mailman.qth.net
>> Subject: Re: [Kenwood] wider transmit SSB audio TS 480
>>
>>
>> Meir's lecturing? 
>>
>> Rob, Meir is giving well-founded information. You're the one who's lecturing. 
>>  
>> 73,
>>  
>> Paul / N1FB
>>
>>
>> --- On Tue, 5/5/09, Rob  wrote:
>>
>> From: Rob 
>> Subject: Re: [Kenwood] wider transmit SSB audio TS 480
>> To: wf2u at ws19ops.com
>> Cc: kenwood at mailman.qth.net
>> Date: Tuesday, May 5, 2009, 7:46 AM
>>
>> Meir,
>>
>> The guy asked if there is a way to open up his 480. If there isn't, 
>> why not tell him that, or do you not know. He didn't ask for a 
>> lecture on tx bandwidth; he asked how to open up his rig.
>>
>> Why not peddle your bandwidth lecture to all these manufacturers 
>> making rigs that tx out of the box 5 KHz or more? The truth is that 
>> wide response sounds good. Excuse me while I enjoy my hobby with 
>> something other than space shuttle quality audio, which if I wanted, 
>> would make me an Icom owner.
>>
>> Joe, if there's no way to open up the 480 on tx you may have to get 
>> another rig. A used TS870 would be a good choice provided it is in 
>> decent shape. Search the ssbaudio yahoo group archive or the mods.dk 
>> website to see if there is anything there.
>>
>> 73
>>
>> rob / k5uj
>>
>>
>>
>>
>> On May 4, 2009, at 3:45 PM, wf2u at ws19ops.com wrote:
>>
>>     
>>> Since human voice carries most of its intelligence (hmmm...) between
>>> 300 and 3000 Hz, it doesn't make much sense to transmit wider than 2.7
>>> kHz for maximum intelligibility and not exceed transmission bandwidth
>>> standards on HF. Widening to 3 KHz will not really add to anything,
>>> your actual voice will be carried with less average power as some of
>>> the power will be wasted transmitting noise and parts of the voice
>>> which are not necessary and (may not be even heard) for the
>>> intelligence carried over the transmission media.
>>> In order to tailor the available bandwidth to your individual voice
>>> characteristics, you can employ an equalizer which will enhance the
>>> spectrum of your voice which may not be strong, reducing
>>> intelligibility, but within the restraints of 2.7 KHz (or rather 2.4
>>> KHz which doesn't take anything away from the intelligibility. Smart
>>> tailoring of the audio response will make your voice sound fuller and
>>> more penetrating, all pluses for radio communications.
>>>
>>> MHO and experience (also profession as EE...) but YMMV.
>>>
>>> 73, Meir WF2U
>>> Landrum, SC
>>>
>>>
>>> Quoting Joe :
>>>
>>>       
>>>> Hi. Is there any way to get more than a 2.4 wide band width from the
>>>> Kenwood 480. Kenwood rigs are known for there good audio and most
>>>> of them go out to 3K on transmit. The narrow transmit band width
>>>> is the only thing I don't like about this rig. If this could be
>>>> done, it would make this the perfect rig in my opinion. The receive
>>>> audio is good.
>>>> Thanks and 73. n3ain.
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>>>>         
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-- 
Bob - NØDGN