Amateur Radio

 

Here you can see some pictures of my "Shack" at my home in the area called Unterland. You can find pictures of my other locations on the respective pages. "Shack", that's how we radio amateurs call our room with the radio equipment such as transceivers for various operations modes like ATV, FAX, SSTV, FM, SSB, satellite communication and Packet Radio. Radio amateurs have the privilege to build their equipment (e.g. receivers, transmitters, amplifiers and antennas) on their own. To test these devices I have acquired over time quite some test equipment.

 

Matthias Bopp DD1US im Shack

 

 

 

 

Amateur Television (ATV) was one of the operating modes I like most. I used to build most of my equipment myself. Shown in the photograph below is my home-brew FM-ATV dual band transmitter (for the 1.2 and 2.4 GHz bands).

During the operation via my local ATV-repeater DB0PE I received the ATV signal at 1.2 GHz using a long Yagi and transmitted my live video ATV signal at 2.4 GHz using a segment dish antenna from Connifer. To allow full-duplex operation the repeater featured an additional 435MHz voice input. I used one of my omni-directional multi-band stacked ground-plane antennas for this input. Unfortunately DB0PE is no more operational in ATV and thus I have presently no more opportunity to operate ATV.

 

In the pictures above you can see my present VHF/UHF/SHF antennas which are mostly omni-directional aerials

Today people can use a simple Internet connection to talk to friends all over the world almost free of charge. However I think that it is still fascinating to use the HF bands with their specific propagation characteristics. On the picture to the right you see a part of my antenna system for the HF bands. The antennas are mounted on a mast which can be rotated 360°. The 3-band dipole is used for 10m, 15m and 20m and on top is a 4 element yagi antenna for the 6m band. I use the 3-band dipole also to receive the russian satellites with HF downlinks. For the 40m and 80m bands I use a W3DZZ wire dipole which can partly be seen on the picture. My transceiver is an ICOM IC-735 with approx. 100 Watts output power. I am not very active on the shortwave bands but if you are interested I will be happy to arrange a sked.

Sometimes I am also using repeaters here in the area. Most of them are for voice but some are also for Packet Radio or ATV. If you want to contact me you can see in the table below, which repeaters I can access from my home and in which of the various operating modes.


10m FM repeater
 

Channel

Output / Input QRG
in MHz

QTH

Call sign

QRA locator

KW4

A29.690/E29.590

Ludwigsburg

DF0LBG

JN48OV

 

2m FM repeater
 

Channel

Output / Input QRG
in MHz

QTH

Call sign

QRA locator

RV49

A145.6125/E145.0125

Stocksberg

DB0STB

JN49QB

RV50

A145.625/E145.025

Heidelberg

DB0ZH

JN49IJ

RV51

A145.6375/E145.0375

Heilbronn
Echolink 469491 

DB0GKN

JN49OD

RV52

A145.650/E145.050

Pforzheim

DB0UP

JN48IV

RV55

A145.6875/E145.0875

Hohe Brach

DB0PE

JN49SB

RV56

A145.700/E145.100

Kalmit

DB0XK

JN49BH

RV57

A145.7125/E145.1125

Ludwigsburg

DB0YY

JN48OV

RV59

A145.7375/E145.1375

Künzelsau

DB0LD

JN49TH

RV60

A145.750/E145.150

Stuttgart

DB0WR

JN48NS

 

70cm FM repeater
 

Channel

Output / Input QRG
in MHz

QTH

Call sign

QRA locator

RU685

A438.5625/E430.9625

Gerlingen

DB0LBG

JN48PX

RU692

A438.650/E431.050

Heilbronn

DB0SS

JN49OD

RU696

A438.700/E431.100

Stuttgart

DB0ST

JN48QS

RU698

A438.725/E431.125

Donnersberg

DB0ND

JN39VP

RU706

A438.825/E431.225

Mosbach

DB0ODE

JN49NH

RU712

A438.900/E431.300

Stocksberg

DB0STB

JN49QB

RU722

A439.025/E431.425

Mannheim

DB0MA

JN49GL

RU730

A439.125/E431.525

Landau

DB0RO

JN49AF

RU732

A439.150/E431.550

Sinsheim
Echolink 271607 via DF4IU-11

DB0NP

JN49KF

RU735

A439.1875/E431.5875

Langenbrand

DB0LAB

JN48HT

RU737

A439.2125/E431.6125

Löwenstein

DB0LBY

JN49QC

RU740

A439.250/E431.650

Heilbronn
Echolink 469491 

DB0GKN

JN49OD

RU742

A439.275/E431.675

Ludwigsburg

DB0LBX

JN48OV

RU744

A439.300/E431.700

Aalen

DB0AA

JN58BS

RU748

A439.350/E431.750

Künzelsau

DB0LD

JN49TH

RU754

A439.425/E431.825

Sachsenheim

DB0GK

JN49MA

 

23cm FM repeater
 

Channel

Output / Input QRG
in MHz

QTH

Call sign

QRA locator

RS11

A1298.275/E1270.275

Michaelsberg

DB0SAQ

JN49MA

RS28

A1298,700/E1270.7000

Löwenstein

DB0LBY

JN49QC

 

ATV repeater
 

Mode

Output / Input QRG
in MHz

QTH

Call sign

QRA locator

FM-ATV

A1278hor/E2342vert

Hohe Brach

DB0PE
(out of operation)

JN49SA

 

Multimode repeater
 

Mode

Output / Input QRG
in MHz

QTH

Call sign

QRA locator

Multimode incl. SSTV

A438.600/E431.000

Kaisersbach/
Mainh. Wald

DB0UHF

JN48TW

 

Packet Radio digipeater
 

Data rate

Output / Input QRG
in MHz

QTH

Call sign

QRA locator

9K6

A430.625/E430.625

Mosbach

DB0RBA

JN49NH

9K6

A438.300/E430.700

Stromberg

DB0EQ

JN49MA

9K6

A1299.000/E1271.000

Mosbach

DB0RBA

JN49NH

The next map shows the location of most of the above listed repeaters with reference to my own location. This map was generated using the excellent Freeware program "Radiomobile". Please note that the full resolution map which you get when clicking on the picture below is 3 MBytes large and the download may take some time.
 

If you are not in my area and thus cannot reach me directly or via one of the repeaters listed above we could also try to get in contact using "Echolink". This is a technology which links amateur radio repeaters via the Internet and thus allows worldwide contacts. In addition it also provides the possibility to access the repeaters from any PC with a Internet connection. Access is only available for radio amateurs holding a valid license. My node numbers are 63949 for my callsign DD1US and 518482 when operating my simplex Echolink gateway.

Usually when I am at home I operate my APRS station which transmits on VHF (144.800 MHz). Thus you can check the status when monitoring the APRS network. If you do not have an APRS station yourself you can also check my status in the internet at www.aprs.fi. You can also simply click on the little map to the left. If I am operating my portable station then I use the callsign DD1US-1. Therefore you might want to check this callsign too.


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