[RTTY] PACTOR

[Phil Sussman]

I agree and believe there are two separate problems:

1.  Automatic or Semi-Automatic stations keying up or being keyed up
     on top of existing QSOs. I know this happens all the time.

2.  Automatic or Semi-Automatic stations keying up or being keyed up
     out of the prescribed frequency range. I know this also happens
     all the time, usually by outside the US or others who don't care.

73 ES TNX - de Phil - N8PS




Quoting "Joe Subich, W4TV" <lists at subich.com>:

>
> On 4/25/2014 9:39 AM, Phil Sussman wrote:
>> I am a member of the "Amateur Radio Pactor and Packet Group" on
>> Yahoo and check their 'conversations' vis PACTOR-4 and RM-11708.
>> These operators confine themselves to 14107-14112 range and do
>> not venture lower. Outside of the US they do use PACTOR-4.
>
> One needs to understand there is a major difference between an
> individual user leaving his radio/modem set up to accept messages
> on 14.107-14.125 and the commercial scale systems that scan 14.060
> to 14.125 looking for callers and responding with no "channel busy"
> detection.  There is also a major difference between an individual
> "mail drop" than the commercial scale autoforwarding systems that
> fire up on their self-assigned "channels" at their pre-programmed
> times without any regard for other activity (other than other
> PACTOR systems) already on the frequency.
>
> From the very beginning, PACTOR has been very intolerant of other users
> on "their" frequencies.  As the maximum bandwidth expands by a factor
> of five from 500 Hz for PACTOR 2 to 2.8 KHz for PACTOR 4 that
> intolerance will continue grows exponentially as PACTOR systems not
> constrained to the sub-bands defined in 97.221 for automatic control
> will spread out rather than coordinate frequency sharing and re-use
> arrangements.
>
> 73,
>
>    ... Joe, W4TV
>
>
> On 4/25/2014 9:39 AM, Phil Sussman wrote:
>> I am a member of the "Amateur Radio Pactor and Packet Group" on
>> Yahoo and check their 'conversations' vis PACTOR-4 and RM-11708.
>> These operators confine themselves to 14107-14112 range and do
>> not venture lower. Outside of the US they do use PACTOR-4.
>>
>> In 'reading' the conversations, they don't understand the problems
>> presented by RM-11708 since they only have individual MBX stations
>> that do not 'pass' traffic. They just leave messages for each other.
>> I'm sure they 'hear' all the automailboxes but (judging because they
>> use PACTOR) claim it doesn't create any problems for them.
>>
>> 73 de Phil - N8PS
>>
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