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HF Propagation


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Multiband HF Projects - CW Transceivers

Click to enlarge"HappyHolidays TRX" - A four band VXO tuned 1 watt QRP CW transceiver by PA2OHH
A simple, solid rig for outdoor use during Holidays. More is possible with this solid QRP rig than you should expect. Just try it and do not give up soon!

Click to enlarge"HIS TRX" for the Barefoot Hiker! by PA2OHH
It is designed for the Barefoot Hiker. His life style is Back to the Basics and that is indeed what Barefoot hiking in nature and working with the HIS transceiver are. HIS is the abbreviation for He Is Simple!

Click to enlarge"MY TRX" All band CW transceiver 5 watt QRP by PA2OHH
"MY TRX" is indeed my transceiver. It is not a perfect transceiver, but good enough for a lot of perfect QSO's. The transceiver has general coverage reception from 1.8 to 30 MHz.

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.

Click to enlargeBIGODE - A RX, TX, TRX QRPp QRP for beginners by PY2OHH
This project is in homage to the colleague SK PY1AFA, GIL (Gilberto Affonso Penna) was director of our main Ham magazine. The name MUSTACHE (BIGODE) is because the Gil exhibited a great mustache.

Click to enlargeBIGODE Multibanda - Um TRX CW 4W para 20, 15 e 10m by PY2OHH
Continuing our assemblies with the BIGODE, we showt here the triband version.
The choice of the bands was in function of the antenna that we have at the moment and had been 3 bands due the amount of keys 2 poles 2 positions to be used.

Click to enlargeThe NorCal Sierra: An 80-15 M CW Transceiver
Most home-built QRP transceivers cover a single band, for good reason: complexity of the circuit and physical layout can increase dramatically when two or more bands are covered.

Click to enlargeThe Wheel is a DSB Transceiver for 80, 40 or 20 Meter by PA3ANG
The transceiver got its name during the Dutch ‘night owls’ net. We all know the expression 're-inventing the wheel'. People thought Fred (PA0MER) was re-invented the wheel. In this case a transceiver using techniques of the past.

Click to enlargeWall Wart Powered "Joneset" Transceiver by K5BCQ
My criteria was: - Basic single tube (dual triode) Frank Jones "One Tuber" design point from 1935 for the receiver, but add an RF amp for isolation to prevent uneccessary radiation.

Creation date : 09/08/2007 @ 20:22
Last update : 23/09/2018 @ 18:15
Category : Multiband HF Projects
Page read 38495 times

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