QRM at 14109.5
- Hi guys.
I'm writing about the situation at 14109.5.
There, from my QTH, I heard a strong "digital" packet stream. It is
quite continuous and for me it's practically impossible to work there.
Maybe someone could suggest me to move up but I think all you know how
much is important this "fixed" frequency. MT63 is not so widely used as
I would... so I think it is important to have a point where to meet
other om calling/listening for in MT63 mode.
I read some times ago another European om (I apologize I miss his call
and name) talking in this group about this matter, he were asking to
move the net frequency. Other OM reply to him it isn't good (I think
so, too). But the question is still unresolved...
In there messages they talking about the nature of this "noise": it is
a packet link between 9H and G station. I am not active in this mode so
I can't confirm it. I ask if someone of you have more information about
it, maybe we can ask for moving the link to the packet station...
I hope you can help me.
73 de Silvio, IZ5DIY
P.S. Is there other OM in my condition? Or is it my antenna that
multiply the QRM? HI & 73
- It has been suggested that we use 14109.3, in order to get away from
the packet guys. This, apparently, is particularly important in Europe.
I have been calling CQ on that frequency, but have not been able to wake
- "s.gaggini@..." schrieb:
> Hi guys.Hello Silvio
> I'm writing about the situation at 14109.5.
> There, from my QTH, I heard a strong "digital" packet stream. It is
> quite continuous and for me it's practically impossible to work there.
> Maybe someone could suggest me to move up but I think all you know how
> much is important this "fixed" frequency. MT63 is not so widely used as
> I would... so I think it is important to have a point where to meet
> other om calling/listening for in MT63 mode.
> I read some times ago another European om (I apologize I miss his call
> and name) talking in this group about this matter, he were asking to
> move the net frequency. Other OM reply to him it isn't good (I think
> so, too). But the question is still unresolved...
> In there messages they talking about the nature of this "noise": it is
> a packet link between 9H and G station. I am not active in this mode so
> I can't confirm it. I ask if someone of you have more information about
> it, maybe we can ask for moving the link to the packet station...
> I hope you can help me.
> 73 de Silvio, IZ5DIY
> P.S. Is there other OM in my condition? Or is it my antenna that
> multiply the QRM? HI & 73
well we are using this frequency for more then 3 years now, and it has proven
to be the best calling frequency
around that part of the band. If you move up or down 500 Hz you are getting
even more in conflict with packet and
also pactor stations, because then they are right in the middle of the MT63
I am also using a vertical antenna but am using passband filters to adjust
the shape, and so i have no problem to
work dx to VK ZL or some other parts of the world. Because MT63 is very
robust on qrm. So try it out.
Regards Chris HB9BDM
- w8isg@... schrieb:
> It has been suggested that we use 14109.3, in order to get away fromHello Bo
> the packet guys. This, apparently, is particularly important in Europe.
> I have been calling CQ on that frequency, but have not been able to wake
> anybody up.
> Bo, W8ISG
well we use actually 14105.45 when we go to 14109.30 we are getting here in
strong pactor qrm but miss the packet - so on the above mentiond frequncy we
have problems. But one should call once in a while and not just listen. I
copy here very
weak signals without any problems, but sometimes hardly getting a answer when
MT63 needs to get used too in order to get good qso's more then any other
Cheers see You on the channel Chris HB9BDM
- Hi all,
Here is a run-down on the most consistant Packet MBO and
forwarding station signals heard on 14100-14112 kHz down here in
the South Pacific for the past 6 months or more:
N.B. These are real frequencies, so add 500-1500 kHz for MT63
frequency use! In addition it seems to me that the Packet emissions
which were all 300 baud at 200 Hz shift, so had an effective
bandwidth of of around 375-400 Hz. (TX station > RX station).
14100.8 - 101.2 EA8DW > EA2HB & RW6AT, CT1FMS > EA8DW
14101.9 - 102.3 unknown
14103.2 - 103.6 LZ2QA > OZ3BBS
14105.2 - 105.6 ADHBBS >CU6GRP, CU6GRP > CT1FMS
14106.2 - 106.6 IK0MIL > TA2BBS
14106.6 - 107.0 VK5HB > VK8DA, UA0SED > RU9AZ
14107.1 - 107.5 CU1CB > IK0MIL, IK0MIL > TA4BBS
14107.5 - 107.9 VK6BBS > VK5LZ, JH8ZKR > UA0JGB & UA0SED
14108.2 - 108.6 RW3SB > RA9XF
14108.8 - 109.2 IC5BCU > RZ6HW
14109.0 - 109.4 RA9XF > RZ6HW, IK5BCU > RZ6HW
14110.8 - 111.2 IK2HDG > 9H1BBS & GB7HFG
14111.1 - 111.5 IK2HDG > RW6AT, KJ6EOD > VE4GQ,
14112.4 - 112.8 (Pactor and SSB at times)
W9QYQ > KE7YX, WA8WNI > VE4GQ & KB0UAC
So, best Packet-free parts of the spectrum appear to be:
14101.3 - 101.9 = 600 Hz
14102.3 - 103.2 = 900 Hz
14103.6 - 105.2 = 600 Hz
14105.6 - 106.2 = 600 Hz
14109.5 - 110.8 = 1300 Hz
14111.5 - 112.4 = 900 Hz
Of course the frequency occupancy that I have observed, may seem
different in say JA, Europe or US East coast, but I think it will be very
Standard MT63 is 1kHz wide, but it is a very robust, qrm resistant
mode, so any of the above 'best Packet-free parts of the spectrum'
frequency blocks should be still be usuable, even though there may
be Packet signals above and below and overlaping the MT63
To conclude, let us please keep 14109.8 to 110.0 (dial frequency
14109.3 to 14109.5) as the common calling freq, and use other
frequencies as required, to avoid qrm to/and from other MT63
stations or from Packet signals.
BUT HEY! does 14 MHz really matter - conditions on 21 and 28 MHz
have been much better than 14 MHz recently. Been monitoring
21130 and 28130 this evening, lots of Asian and EU signals, but no
MT63 or Packet even !!! Anyone want a sked? Vic? Christian?
73, Frank ZL2BR
- Hi Frank and all MT'ers
It would be nice to read you again on 28 Frank as we have in the past. I am
free for any suggestion on skeds both 28 and 14 mHz.
I concentrate on 14Mhz 0800-1000UTC where I have over the past week worked
both VK and ZL stations. Later in the day my attention turns to 14109.5 at
2200UTC where I find the Japanese stations coming through both in MFSK and
MT63. Nice half hour chat with Tom JK1SCL at 2142UTC onwards. Contact
earlier was very scrappy.
During our daytime here both Peter G3PEJ and myself both keep watch on 28130
and 28080 for any activity. I see from my log here those 28 mhz contacts
with you was 1046 and 1050UTC.
We observe the beacons up on 28200 and though they are there in good
strength it seems to have no indication on activity one will find lower down
73 de Vic.
G 3 G K I