Tag: DMR

Bluestack and BlueDV: Hotspot in a box

A complete portable D-Star and DMR hotspot

Developments for DMR and D-Star hotspots go fast. I already owned a UHF hotspot from PE1PLM which fits on top of the Raspberry Pi. With custom firmware, this also works with MMDVM software thus DMR. A new toy is the BlueStack, developed by PE1MSZĀ and sold via CombiTronics.nl. Put the DVMEGA (UHF) transmitter on top of …

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Playing with the DV4mini

The last post has been a while now. I was busy preparing the annual Balloonfoxhunt and helping Mischa (PA1OKZ) out with expanding the PI2NOS repeater system. Last week a package arrived from Hamshop, the distributor for the DV4mini USB stick in the Netherlands and Belgium. Time to start playing around… What is the DV4mini The …

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PI1AMS view

The view from PI1AMS, DMR-repeater Amsterdam.

Adjusting Cavity filter

Today I’ve been working on the Cavity duplex filter for the new DMR-repeater. The exact frequency is yet unknown but I assume it will be 438.3125 MHz for the output and 430.7125 MHz for the input, which makes a -7.6 MHz shift. I’m the lucky owner of a Rigol DSA815 Spectrum Analyzer (9 kHz – …

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Preparing DMR-repeater

I’m busy preparing a new DMR-repeater. The exact location is unknown but having a look at white spots in the coverage maps from the current repeaters most-likely it will be somewhere in the Northern part of the Netherlands. The repeater is the Hytera RD985 so it will join the HYT-network. Currently there are 3 options …

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Going digital with DMR

After D-star there is DMR. Not that I’ve used D-star much but just want to give new techniques a try. Yesterday I’ve ordered a Hytera MD785G. This is a mobile UHF-transceiver for both analogue FM and DMR. Ideal as a second set for the local repeaters since the 2nd VFO of my Icom IC-9100 is …

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