[VHFcontesting] How to order

Bill Junor junorwider at msn.com
Tue Jan 23 23:07:14 EST 2018


What you say about QRO stations monopolizing the MSK144 call frequency isn’t correct.

First, there is a geographical filtering happening.  There has to be the correct geometry  between the TX and RX stations and the meteor trail.  Admittedly, this isn’t sharp but it’s sufficient for many geographically-dispersed users to use the MSK144 call frequency at one time.  Next, you can use a directional antenna to further “filter” your transmit and receive opportunities.  Thirdly, you can call on the calling frequency and announce on what frequency you will be listening for replies e.g. I can call ”CQ 248 AI5I DM65” on 50.260 and listen for replies on 50.248.  The new QSO will happen entirely on 50.248. Next, you can call on the same or opposite sequence to the QRO station, depending on your intention.

The situation of QRO stations beside less powerful stations happens all the time in contests and in Es season.  This isn’t just something that happens with MSK144.  When that happens I move frequency, or change mode, or point the beam in some other direction,  or some combination of all these. You could also set up a sked on one of the chat pages (PingJockey, ON4KST, for example) and have a MS QSO on a frequency away from the calling frequency. Or just simply announce on the chat pages that you are calling CQ off the normal calling frequency.

You do have options.  If your solution is that QRO stations should switch off for a while to let QRP stations have a contact, then you are missing the point about contesting.  Besides, there’s the practical point of how we would coordinate this.

If your problem is that you have lots of very local QRO stations then your difficulties are going to be more than not being able to have MS contacts on 50.260.  (Move to New Mexico --- we have lots of space and lots of radio silence.)

Bill / AI5I

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From: Joe<mailto:ptvjoe at pa.net>
Sent: Tuesday, January 23, 2018 1:06 PM
To: VHF Contesting<mailto:vhfcontesting at contesting.com>
Subject: Re: [VHFcontesting] How to order

It seemed that not many stations were on 6 and 2 meters voice as most were
on 50.313 digi and a few on 50.260 MS. There were a few calling CQ on 2
meters(voice) and making some contacts.
Being a fixed location Opr this time, I did get on FT8 and FSK144 modes.
Contacts were a bit slow. Saturday, I was having a hard time getting
through the normal sequence with other stations until I found out I was
using an outdated WSJT-X ver 1.8.0 rc1. After I copied and installed the
final version WSJT-X ver 1.8.0 on Sunday, I started making contacts.

As a rover, June through Sept, I dont have the room to operate off tailgate
on PU truck to be able to use a computer. One more item to try and shelter
from the rain.
Wont be worth going out as a rover if most all will be using the Digi modes
Dont get me wrong, I like to operate the digital modes too.
The rovers, who were out, provided a lot of Voice Qso's where they could be
worked from my location.

My PU truck Rover mobile has a low profile camper cap on it, but equipment
takes up a lot of room and no room for an 'under a roof' opr bench unless I
eliminate bands above 1296. Even then it has very limited room in the back.
My PU has standard cab with no rear sliding window to be able to operate
from up front in the cab.

There were a few 6 mtr openings towards South  from South Central Pa. I saw
on the screen a station located in EL87, and another in EM96 using MSK144,
MS mode. I finally did work a station in EM90 later Sunday afternoon early

What makes it tough to work MS, besides depending on random meteor shower
activity, Is that MSK144 uses only one Audio carrier freq of @1500 Hz(
USB). So its designed more for one station at a time to make a contact.
(FT8 allows multiple contacts at a time).

High powered stations that set on the 50.260 Freq calling CQ for more than
20 times in a row on MSK144, Like I saw Sunday, Does not let other lower
powered uses have a chance to make any contacts.
Both stations are usually on the Odd sequence and would be transmitting the
same time, thus the higher power stations could be covering up the lower
power station to a distant station.
One could call CQ on the Even Sequence but may be interfering with another
station in the process of making a contact. Not good!
Limiting the continuos CQ's in a row to say 6 or 7 at a time,  than taking
a break and then go at it again, Might, let a few lower powered stations
have half a chance to make a contact too??

Food for thought.


At 10:20 1/22/2018, Herb Krumich via VHFcontesting wrote:
>Does anyone know of a company that is manufacturing a six meter
>tranceiverthat is rock bound on 50.313Looks like in the future, there is
>no need to tune the six meter band ?ThanksHerb K2LNSat WA2FGK FN21
>VHFcontesting mailing list
>VHFcontesting at contesting.com

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