LF: Re: [rsgb-lf-group] Frequencies for JT9-Slow

[N1BUG <paul@n1bug.com>]

It is for me. When doing mode comparison tests or any time I
particularly want stations to listen for me, I prefer to set up such
that listeners can use the same 'dial' setting as for
WSPR/OPERA/whatever.

There are a few who will forgo monitoring WSPR/OPERA/whatever for a
few nights to participate, but a larger number who opt out unless
they can do both.

Paul



On 1/2/19 7:32 AM, Andy TALBOT wrote:
> OK, so it looks as if the preference is for a "Dial" (or as I prefer to
> call it, 'SSB Carrier' ) Frequency the same as for WSPR then adjust the
> audio tone appropriately.
> Makes sense.
> 
> I really ought to start afresh with a new controller / source module
> hardware that has switch settings to call-up different  pre-stored
> frequency and rate options.
> 'tis just laziness trying to use the existing one that needs reprogramming
> for any change.
> 
> Andy
> www.g4jnt.com
> 
> 
> 
> On Wed, 2 Jan 2019 at 12:00, N1BUG <paul@n1bug.com> wrote:
> 
>> Andy,
>>
>> The present version of SlowJT9 has a limit of 843 Hz audio frequency
>> for JT9-5. JT9-10 when implemented may have a 419 Hz limit.
>>
>> During recent tests, some preferred to transmit around 136.6 to
>> 136.85 to allow receiving stations to leave receivers on 136.000 and
>> still monitor other modes along with JT9-5. Others could not do that
>> and operated JT9-5 around 137.3 to 137.4.
>>
>> If Rik is able to remove the audio frequency limitations I expect
>> this split to disappear with everyone preferring to be in the 137.3
>> to 137.4 area.
>>
>> 73,
>> Paul N1BUG
>>
>>
>>
>> On 1/2/19 6:45 AM, Andy TALBOT wrote:
>>> I've lost track of the emails, and BS has no archive so:
>>>
>>> What frequencies have people been using for the JT9-Slow tests.  And are
>>> these now sort of de-facto fixed?
>>>
>>> I'll be coding up a PIC / GPS / DDS combination for a JT9-Slow modes
>> beacon
>>> test source soon.   Freq shift / baud settings based on an early WSJT-X
>> Ver
>>> 1 document found on Joe's site.
>>> http://physics.princeton.edu/pulsar/K1JT/WSJT-X_Users_Guide.pdf    page
>> 21
>>>  viz. shift / baud rates of :
>>>
>>> -1   12k / 6912
>>> -2   12k / 15360
>>> -5   12k / 40960
>>> -10 12k / 82944
>>>
>>> a -30 version is also shown there  as 12k / 252000
>>>
>>>
>>> Andy
>>> www.g4jnt.com