Welcome to the repeater site of



This site I made to give some information about the 3 FM repeaters in the city of Venlo.

Venlo is in the South East part of The Netherlands, close to the German border.


Go to : Repeater pictures


The repeaters are made by two radio amateurs :

PE1MDG : He helped with 19"inch racks, making of PCB's, front panels, 220V AC power supply, helping with tests, etc.

PE1RAH : I did do the electronics part, designing circuits, making PCB's, programming, adjustments, made the two 3-band antennas, etc.


The total station :

2 mtr Pi3RNL TX : 145.6125 MHz. RX : 145.0125 MHz. (-600kHz. Shift).

70cm Pi2RNL TX : 430.3500 MHz. RX : 431.9500 MHz. (+1.6 MHz. Shift).

23cm Pi6RNL TX : 1298.425 MHz. RX : 1270.425 MHz. (-28 MHz. Shift).


Location :

The station is located on an 30 meter high flat building.

This flat building is lokated on the highest location in the area of Venlo.

The TRX are standing in an little room, just below the elevator machine room.

Gridsquare : JO31BH


Callsigns :

All three the repeaters have the same suffix : RNL.

RNL is standing for : Regio Noord Limburg. (Region North Limburg)

PS: Limburg is the South-Eastern province of The Netherlands.

All the callsigns are connected to my license ( PE1RAH ), and can now operate unmanned.


2 Meter (Pi3RNL)

The 2 meter part is based on two Teletron T813 (old bus TRX) devices.

Both are modified to the repeaters amateur frequentie.

The output power is 10 Watt.


70cm (Pi2RNL)

The 70cm part is based on two old ATF2 parts that are used in an ATF2 base station.

Both are modified to the repeaters amateur frequentie.

The output power is 10 Watt.


23cm (Pi6RNL)

The 23cm part is an copy of the 2m repeater with behind it an 2m/23cm convertor.

The output power is 2 Watt.



The total station (2m/70cm/23cm) is working via two "3 band GP" antenna's.

The RX antenna is standing exactly above the TX antenna, and because they have both high gain,

interference is very low and we don't need cavaties.

To make it possible to use three repeaters via two antenna's at the same time, we use two

"3 band" antenna filters. (One for RX the other for TX)

To reduce cable losses, we use low loss H100 coax cable with high quality N-connectors.

The total coax cable length is about 15 meter what gives us little cable losses..


Control unit :

Every repeater is controlled by its own uProcessor system.

All repeaters have the same system so we can exchange them when necessary !!

Because of this, all repeaters are working exactly the same.

The only differences are the callsigns that are programmed into the EEPROM audio system.

The control units are based on an self designed, tested, and made 8049 uProcessor system.

The system is able to detect : Carier, 1750 Hz., CTCSS, and DTMF codes.

Because an repeater is primairly made for mobile and portable stations to get longer range distance

it can be activated without any tone code, just push PTT and talk !!!

After every transmision the repeater gives an rogerbeep, it is very usefull for mobile and portable

stations with lot of noise surround them.

The callsign is given by an female voice in standby mode, and when an qso is going on it switches

to the CW mode for minimal interference of the qso.

To protect the repeater against long times of transmision, and prevent it against endless speakers,

it has got an "strengler". It switches of the transmitter after more than 3 minutes of continues TX.

The timer of this "strengler" is reseted when the rogerbeep is given.

This gives mobile and portable stations also the chance to log in, instead of waiting an long time before

an endless speaker is finished with his/her talking.

Lokal amateur now say "I release my PTT to pay" or "I must put in another coint" .

This all helps them to remember not to talk longer than 3 minutes.


3 Band Crossband Mode :

What is crossband ? Crossband mode is like an normal repeater, only TX and RX frequenties are both

at different amateur bands.

Most modern dual band portable radio have such option too.

I wanted to test something new. 3 band crossband & repeater mode at the same time !!!!!!!!

We had already 3 stand-alone repeaters, the only thing is connecting them with some inteligent logic.

Lot of amateurs told me it is not possible, but it really works !!!!!


It is very usefull for testing your self made TX or RX, (also an reason why the repeaters can be activated

without an tone code!)

Or for two mobile stations who both have different TRX bands, they can still QSO via crossband mode.

Unfortunatly only few people have discovered these usefull features.

PI3RNL,PI3RNL,PI6RNL are the first dutch repeaters that can operate in :

Normal repeater mode & 3 band crossband at the same time !!!!


Some words from myself (PE1RAH)

For me it was very interesting to design and make this station.

The most interesting thing for me is the technical part, I learned a lot of things by doing this project,

and I hope lot of amateurs will enjoy my HAM tests.

73 de William PE1RAH 


This page is designed and created by PE1RAH. (William Leijenaar).