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HF Propagatie


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Multiband HF Projekten - SSB Zendontvangers

Klik voor vergroting“Give me FIVE!" – A QRP SSB multiband transceiver by DK7IH
Building a multi band rig is, as you might conceive, much more complicated than setting up a monobander. Seems sensible.

Klik voor vergrotingA QRP SSB Transceiver by WB9IPA
After having been substantially inactive for the last several years, I decided to get back into amateur radio. Having always preferred tinkering with radios over operating them, I decided ... to build a radio ...

An experimental DSB/CW QRP rig for 20 and 40 meter bands by IK3OIL
The building of an HF phone rig today isn't shurely a simple job, however I'd like to propose an easy-tomake project, suited for portable or emergency use.

Klik voor vergrotingDDS HF Transceiver SSB/CW by YO4HFU
This SSB/CW transceiver is designed to cover 160m-10m amateur bands. VU3CNS DDS with AD9850/1 was used with satisfactory performances. Some spurious can be found above 14MHz band. DDS clock signal (150MHz) is an external oscillator to minimize the phase noise.

Klik voor vergrotingDirect Conversion HF Transceiver with DDS LO by OH7SV & OH2NLT
Direct conversion HF radio with DDS frequency synthesizer is very interesting concept. OH7SV and OH2NLT are experimenting with such rig. Full stories will become available when project matures. Here we have some preview pictures and material.

Klik voor vergrotingDirect Conversion QRP Transceiver v1 by YO3BN
I always wanted to have a small QRP transceiver capable of voice and CW communications on any frequency between ELF-HF, powered from batteries, taking it everywhere with me for portable operations.

Klik voor vergrotingHet Wiel, een DSB Transceiver voor 80, 40 of 20 Meter door PA3ANG
De transceiver dankt zijn naam aan het nachtuilen-net. Men vond dat Fred PA0MER opnieuw het wiel had uitgevonden. In dit geval een zend/ontvanger die gebruik maakt van ‘n techniek uit het verleden.

Klik voor vergrotingHF Transceiver by EI9GQ
This page will describe the construction of a multi band SSB transceiver. Because I do 99% of my operating on my four favourite bands, I decided to build a four band rig with provision for adding a fifth band later.

Klik voor vergrotingHigh Performance HF Transceiver by YO3DAC/VA3IUL
High Performance HF Transceiver.

Klik voor vergrotingHome brew HF SSB transceiver by VK3EPW
I responded a CQ call on 14.160MHz today and ended up having an entertaining conversation with Peter, VK3EPW. He's 1,000Km away, was running 15W and using a home made transceiver, so naturally I asked for more information.

Home-Made KW-Transceiver durch DC4KU
Prinzipaufbau eines großsignalfesten KW-Transceivers mit hochliegender 1. ZF.

Klik voor vergrotingJUMA-TRX2 High Performance Transceiver by OH2NLT & OH7SV
JUMA TRX2A is a high dynamic range transceiver for SSB and CW, using the quadrature sampling technique for demodulation and modulation with the low noise phasing method.

Klik voor vergrotingMinima -A general coverage transceiver by VU2ESE
The Minima is a simple and easy to operate transceiver for all the HF bands with a crisp receiver, a clean output and component cost of less than $100.

Klik voor vergrotingMultiband shortwave tranceiver by PE1JPD
During the spring 2013 I decided to build a shortwave transceiver to participate in the vacation round on 40meters. First with 15W only on 40 meters, and with an open dipole on the camping 3 meters above ground I worked a lot of stations in all of Europe.

Klik voor vergrotingSPOTTO - A Direct Conversion High Performance Universal DSB Transceiver by KANG. K.P.S.
When I incepted the design of SPOTTO the focus was mainly on a simple and quieter high performance receiver with excellent sensitivity and dynamic performance combined with a simple DSB transmitter offering cleanest and moderate output for QRP use.

Creatie datum : 23/09/2018 @ 18:15
Laatste wijziging : 06/03/2019 @ 13:46
Categorie : Multiband HF Projekten
Pagina gelezen 2924 keren

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