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From: "Dave G3WCB." <ganymede444@btopenworld.com>
To: <rsgb_lf_group@blacksheep.org>
Date: Sat, 19 Oct 2013 20:47:36 +0100
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Subject: LF: JT9 QSO on 475kHz?
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Ah!

That explains the signals I saw on my WSPR screen this afternoon, about1700
utc. They must have been JT9 transmissions, on 475.58 kHz approximately.

73, Dave G3WCB IO91RM

-----Original Message-----
From: owner-rsgb_lf_group@blacksheep.org
[mailto:owner-rsgb_lf_group@blacksheep.org]On Behalf Of Tobias DG3LV
Sent: 19 October 2013 20:36
To: rsgb_lf_group@blacksheep.org
Subject: Re: LF: JT9 QSO on 475kHz?


Hi Rik !

Sven and me had been working on 1380 Hertz Audio and the standard
474.200 kHz Dial. The Idea behind was, that there might be some Hams
around seeing a signal just below the WSPR passband and beeing curious
enough to explore whats going on there. Just to raise some more stations
to join in.

73 de dg3lv Tobias

Am 19.10.2013 21:07, schrieb Rik Strobbe:
> Hello Tobias,
>
>   what frequency do you use for JT9?
>
> 73, Rik  ON7YD - OR7T
> ________________________________________
> Van: owner-rsgb_lf_group@blacksheep.org
[owner-rsgb_lf_group@blacksheep.org] namens Tobias DG3LV [DG3LV@gmx.net]
> Verzonden: zaterdag 19 oktober 2013 20:28
> Aan: rsgb_lf_group@blacksheep.org
> Onderwerp: Re: LF: JT9 QSO on 475kHz?
>
> Hi Rik !
>
> A second station will be Sven DF2FF, we have just done some tests with
> the new version of WSJT-X and had some QSOs. He is using a Softrock
> RxTx6.2 as I do.
> After 20:00h UTC conditions might be good enough to try some QSOs?
>
> 73 de dg3lv Tobias
>
> Am 19.10.2013 19:05, schrieb Rik Strobbe:
>> Hi Tobias,
>>
>> I don't have a specific day/hour in mind. Let's see if there is some more
response.
>> About "linear operation": I assume that you refer to frequency
conversion. The amplifiers do not have to be linear for JT2 (and WSPR). In
fact I do use a class D push-pull PA.
>>
>> 73, Rik  ON7YD - OR7T
>>
>> ________________________________________
>> Van: owner-rsgb_lf_group@blacksheep.org
[owner-rsgb_lf_group@blacksheep.org] namens Tobias DG3LV [DG3LV@gmx.net]
>> Verzonden: zaterdag 19 oktober 2013 18:13
>> Aan: rsgb_lf_group@blacksheep.org
>> Onderwerp: Re: LF: JT9 QSO on 475kHz?
>>
>> Hi Rik !
>>
>> Yes, would be nice to have some QSOs again. At what time did you intend
>> to begin trying a QSO?
>>
>> There should be a couple of stations around, which are capable of linear
>> operation.
>>
>> Just updated my WSJT-X installation with
>> latest version of WSJT-X (dated 4.October 2013):
>> http://physics.princeton.edu/pulsar/K1JT/WSJTX_121r3590.exe
>>
>> latest Manual rev 1.2, (dated 16.August 2013)
>> http://physics.princeton.edu/pulsar/K1JT/WSJT-X_Users_Guide_v1.2.pdf
>>
>> 73 de dg3lv Tobias
>>
>> Am 19.10.2013 11:28, schrieb Rik Strobbe:
>>> Dear all,
>>>
>>> there is a lot of WSPR activity on 475kHz recently.
>>>
>>> Checking wsprnet.org I noticed that I copied 34 stations and was copied
>>> by 67 stations. 25 of these were copied by me and copied me, so
>>> potential QSO partners in JT9-2 mode.
>>>
>>> Anyone interested in some JT9 tests ?
>>>
>>> It would be nice to make some QSO's in this mode.
>>>
>>> 73, Rik  ON7YD - OR7T
>>>
>>
>