Ny 10m-repeater i Berlin

Berlin 10-metre Relay DBØBLO goes into normal Operation

After extensive testing, the DBØBLO 10-metre relay goes into normal

operation. The initiative and realisation of this relay radio station

comes from DARC local club Berlin-Hohenschönhausen (D20).

The relay transmitter operates on the assigned frequency of 29,640 kHz

and the receiver according to the band plan 100 kHz lower on 29,540 kHz.

The modulation type is narrowband FM (NBFM).

In order to realise the isolation between transmitter and receiver,

remote receiver sites were developed in Lichtenberg and Rummelsburg.

The connection between RX and TX is realised via the Hamnet or the

Internet. A total of three Rasperry Pi control the process with the help

of the SVXLink software. The strongest signal is sent to the

transmitter. The relay is carrier-controlled.

In order to prevent the transmitter from being triggered by short peaks

(e.g. due to OTH radar interference), the carrier must be stationary for

about one second before the relay is opened. A roger beep signals the

carrier drop at the receiver.

A K is sent for Lichtenberg and an R for Rummelsburg.

You can find more information about the location at


(Från IARU Region 1 HF-managers list, tnks DF5JL),


Author: SM1TDE

Radioamatör sedan 1989. Dagligen aktiv på telegrafi. Medlem i FOC och SSA. Sektionsledare HF sedan januari 2021. Född 1972.