+ + + - D L 4 X A V - jo 43 xn - h a m b u r g , g e r m a n y , e u r o p e , e a r t h + + +
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homebrew projects

H F

 all HF projects

longwave ferritantenna

 Langwellen Experiment mit passiver Ferritantenne
longwave experiment with passive ferritantenna
- NEW -

FA SDR KIT für
600 KHz, 21.4 und 45 MHz ZF

german language		 Beim Funkamateur gibt es SDR-Einsteiger-Kit's und SDR-Kit's.
Leider gab es bisher keine Varianten für 600 Khz, 21,4MHz und 45 MHz
- NEW -

PK-232 controls
TS-430

 ! very simple ! - PK-232 starts / stop the TS-430 scanner.
for automatic AMTOR / PACTOR reception or a mailbox setup
and a shell scripts using the pk232 with a linux box.

28 MHz
Tranceiver

 single oscillator single channel SSB tranceiver
theorie

stands like a rock
VFO

 a design by G4JG (ex DL4CB)

PA0FRI
S-match

 for ballanced line antennas, simple handling and works very good

extended
zmatch tuner

 		works 160m - 10m including 30m band

9:1:1
BalUn

 one longwire feeds 2 receivers with a 9:1:1 UnUn

dachrinnen
vertikal

 3-Band vertical - german language

2m + 6m + ein KW Band (14 - 30 MHz)

 3 Band Mobil Antenne
german language

SAILOR / DEBEG 7284 SSB RECEIVER

voltage howto, X-tal mod, 80m mod, LSB mod

J-Antenna howto
Meine Methode beim Bau von J-Antennen
german / english

VHF / UHF

 all VHF / UHF projects with pictures

K&L tunable bandrejectfilter

 125 - 250 MHz -new-

sleeve and bazoka vertical

 cheap antenna experiment -new-

realistic PRO2005 / 2006 mods

 WFM mod and NFM discriminator out -new-

70 cm MOXON for hand helds

 a portabel SAT antenna -new-

90 degree
combiner / devider

for experimental use

2m Lowpass Filter mit 70cm Notch

 Sat Filter zur unerdrückung unrewünschter Aussendungen bei 2m uplink und gleichzeitiger verminderung von Blocking Effekten des 2m Vorverstärkers bei 70cm Uplink.

MIKOM
DC bias tee

 GSM bias tee modification
for HAM radio use

FK-105
crossband repeater

 how to make a VHF/UHF crossband repeater with 2 Grundig FK-105

FK-105
failure fixing

 fixing the squelch and PA wild oscilation

VHF / UHF
LPDA´s

 dualband log periodic antanna
for 2m and 70cm band.
by DL 9 HCG

halfwave
filter

 VHF / UHF / L-Band - low Q halfwave bandpass filter

simple
coax filters

howto make coax notch filters,
and what are they good for.
-update- -

VHF/UHF
antenna

 this is my design for 2m and 70cm band.
on 2m it works as a dipole with reflector.
on the 70cm band its a 8 element array.

1 GHz
low pass filter

 comercial low pass 1 GHz.

DIY 1.2 GHz coax relays

 with SDS relays

Half SDR

 10.7 MHz IF converter 20 KHz bandwith

10.7 MHz IF-SDR

 software defined radio
10.7 MHz FA SDR KIT

inline amp
900 - 2150 MHz

 documentation and modification

home rig qsl info feedback links H F V / UHF disclaimer

dl4xav 2012