[600MRG] HF-MF band planning

[Carl]

It is my understanding that JT-65 is transmitted in the USB mode of the 
typical SSB exciter and that is where the IMD is generated. If that is going 
into a Class C amp it can only get worse.

There wasnt a turf battle on 160 until more JT-65 users arrived and wouldnt 
listen to reason on how to adjust their rigs, its not much different than 
trying to use a SS rig and linear amp on AM...... set up correctly and they 
sound fine.

Even K1JT himself has stated that JT-65 should only be used on the higher HF 
bands and up as it was developed for EME and MS and to use JT9 elsewhere.

Listen on 1838 when the band is active.

Carl
KM1H


----- Original Message ----- 
From: "Edward R Cole" <kl7uw at acsalaska.net>
To: "Carl" <km1h at jeremy.mv.com>; "Michael Mussler" <mmussler at wispertel.net>; 
"Rudy Severns" <n6lf at epud.net>
Cc: "600MRG" <600mrg at w7ekb.com>
Sent: Monday, March 03, 2014 9:40 PM
Subject: Re: [600MRG] HF-MF band planning


> Carl,
>
> What are you talking about?  JT-65 is the same as CW, a single tone that 
> changes audio frequency in steps.  No IMD.  In fact one can run a class-C 
> amp with it, just like CW.  It does take up wider bandwidth but that is a 
> separate issue from IMD.  If they are overdriving the amplifiers into 
> clipping that would be bad.  You can do that with CW.
>
> I have no idea how JT65 is being utilized on 160m, so there may be some 
> turf battles going on.  On 630m JT-65 probably takes up too much spectrum 
> and a NB mode like JT-9 may be more appropriate.
>
> I would like to see a version or variant of psk-31 allowed for plain old 
> "rag chew" texting.  RTTY may take too much bw.  Packet is certainly out.
>
> CW should be included.  Is their enough room for WSPR?  Or should we 
> develop a variant of WSJT that can do both communicating and propagation 
> beaconing?  We need for Joe Taylor to be informed of this discussion.
>
> 73, Ed-KL7UW
>
> At 11:55 AM 3/3/2014, Carl wrote:
>>Id also suggest that JT-9 be used for all MF and lower HF bands as it is 
>>far superior and the occupied bandwidth is much narrower than JT-65 plus 
>>its attendent poor IMD from poorly adjusted equipment. It has already 
>>ruined part of the 160M DX window on 1838.
>>
>>Carl
>>KM1H
>>
>>
>>----- Original Message ----- From: "Michael Mussler" 
>><mmussler at wispertel.net>
>>To: "Rudy Severns" <n6lf at epud.net>
>>Cc: "600MRG" <600mrg at w7ekb.com>
>>Sent: Monday, March 03, 2014 2:27 PM
>>Subject: Re: [600MRG] HF-MF band planning
>>
>>
>>>I made a similar response; including MF for their consideration.
>>>
>>>-Mike/12
>>>
>>>
>>>
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>
> 73, Ed - KL7UW
> http://www.kl7uw.com
>     "Kits made by KL7UW"
> Dubus Mag business:
>     dubususa at gmail.com
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>
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