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A few years ago the Dutch telecom company disabled and removed their ATF2 and ATF3 mobile telephone systems. The RS9044 and RS901 were used as basestations for this mobile phone systems. The RS9044 became available for amateur use in the Netherlands and Belgium mainly. Later, i heard about RS9042 and RS904D in France and RS9045 in Sweden. On the bottom of this page are two English documents, the modification is based on the RS9044. The new amateur software software has been tested with the RS9044, RS901, RS9042 and the RS9045.
Please see the
modification
page for the EPROM replacement.
For people who are interested in the original configuration, i have retuned the original software to 430-435MHz for
RS9042
,
RS9044 V0/1
,
RS9044 V3/4
,
RS9045
and the VHF version
RS9160
. This software is not perfect for amateur use.
The RS901 is a 900MHz radio and is almost identical to the RS9044.
The RS9042 is about 420MHz. Compared to the RS9044, the RS9042 has no modem, no 7-pole filters and a backuped SRAM.
This seems to be the same for the RS904.
The Swedish version RS9045 has an internal reference oscillator, mounted on a board and placed next to the IF unit. The RS9044 doesn't have an internal reference oscillator at all. An other nice advantage is the second receiver of the RS9045, switching between the receivers is done by an extra
PCB
.
Several amateurs are using this radio as a relais station, at least two of them are using a different modification for the filter part. The first i knew was John PA3HGQ, the sysop of PI2FLD in Almere, indipendent of John a German amateur Kai Siebels was doing almost the same modification. John removed the cap of the filter and created a new inductor, using the same type wire, but only about 1cm longer. Kai made a
The
modification
on this page is very easy and has most possibilities due to the used software. More than 50Watt at 70cm