Zelfbouw Links

Sluiten VLF Projekten

Sluiten 136 kHz Projekten

Sluiten 472 kHz Projekten

Sluiten 500 kHz Projekten

Sluiten Multiband HF Projekten

Sluiten 160m Projekten

Sluiten 80m Projekten

Sluiten 60m Projekten

Sluiten 40m Projekten

Sluiten 30m Projekten

Sluiten 20m Projekten

Sluiten 17m Projekten

Sluiten 15m Projekten

Sluiten 12m Projekten

Sluiten 10m Projekten

Sluiten 6m Projekten

Sluiten 4m Projekten

Sluiten VHF Luchtvaart

Sluiten 2m Projekten

Sluiten 70cm Projekten

Sluiten 23cm Projekten

Sluiten 13cm Projekten

Sluiten 9cm Projekten

Sluiten 6cm Projekten

Sluiten 3cm Projekten

Sluiten 1,25cm Projekten

Sluiten EHF Projekten

Sluiten Antenne-aanpassingen

Sluiten Shack Accessoires

Sluiten Voedingen

Sluiten Meetinstrumenten

Sluiten µController Arduino

Junk Box Circuits

Sluiten Buizen

Sluiten Transistors 2N-Serie

Sluiten Transistors BC-Serie

Sluiten Transistors BD-Serie

Sluiten Transistors BF-Serie

Sluiten IC 74XX-Serie

Sluiten IC 74LSXX-Serie

Sluiten IC 74SXX-Serie

Sluiten IC LM-Serie

Sluiten IC TDA-Serie

HF Propagatie
RSS lezer
Bezoekers

   Bezoekers

   Bezoekers online

Zoeken




40m Projekten - Diverse Antenne's

Klik voor vergroting"ZIPPIRO" the zipped antenna by IZ7DJR
Very compact and high efficiency antenna ,very low radiation angle even at low height. Surprisingly good signal reports.
https://www.qsl.net/iz7djr/ehc.htm

40m Receiver EH Antenna by G8ODE
The two aluminium 50 mm tubes form a capacitor, and together with the variable capacitor are wired in parallel with the 16 turns coil. The antenna is coupled with the second coil of 3.5 turns coil. that connects the SO239 socket directly feeding the radio.
https://rsars.files.wordpress.com/2013/01/40m-eh-receiver-antenna-g8ode-iss-1-31.pdf

Klik voor vergrotingActive Ferrite Rod Antenna for HF by OH7SV
The red connector is for an optional external antenna wire and the black connector is for a ground wire. The red is wired to secondary winding and the black is connected to the circuit ground plane.
http://www.saunalahti.fi/hohtola/ham/active-ferrite-rod-antenna/active-ferrite-rod-antenna.html

Klik voor vergrotingActive Ferrite Rod Antenna by OH2NLT
Matti OH7SV did some tests to find out if Active Ferrite Rod antenna can be build for 80 / 40 Meter ham band reception.
I did boxed version of this antenna for practical tests. Antenna construction presented with few pictures.
http://www.kolumbus.fi/juha.niinikoski/Ferrite_antenna/Ferrite_antenna.htm

EH Antenna for 7MHz by F5SWN
An 50 cm (19.68 in.) 7MHz antenna suitable for indoor or a small outdoor cleared area?
http://www.f5swn.fr/en/?Downtown-ham/EH-for-40-meters

Klik voor vergrotingFerrite Rod TX Antennas by G3XBM
As a quick experiment today (Jan 31st 2013) I tried using my small ferrite rod as a TX antenna. The rod has about 80 turns of 0.5mm diameter wire wound on it for when it is used as a loading coil on 472kHz.
https://sites.google.com/site/g3xbmqrp3/antennas/ferrite_tx

Creatie datum : 08/03/2019 @ 13:55
Laatste wijziging : 26/03/2020 @ 23:18
Categorie : 40m Projekten
Pagina gelezen 8320 keren

Print deze pagina Print deze pagina

Google Ads
^ Boven ^