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HF Propagation


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15m Projects - CW Transceivers

Click to enlarge15m CW Transceiver by PY2OHH
15m was always my preferred band, in spite of propagation going down, we learnt much from this project. I haven't indulged into making QSOs because I have little time to run the radios.

Click to enlargeI5M Himite by 5Z4FT
The Himite is an upper HF band version of the Rockmite, with designed in modifications to improve the original Rockmite efficeincy, it is my current project to evaluate the difference between 15M, and 20M QRP operation, before continuing with the Norcal Sierra project.

Click to enlarge15m Pipit QRP CW Transceiver by G3XBM
The rig is a simple direct conversion transceiver based around the OXO transmitter by GM3OXX with an SBL1 or similar double balanced mixer based direct conversion receiver.

Click to enlarge2N2/15 CW Transceiver Design Page by K8IQY
The design goal of this rig is to provide a 15 meter CW rig that has good performance, while using discrete, readily available components whenever possible, including the venerable 2N2222 transistor, so that the rig can be reproduced in 3rd world countries by ham radio operators of modest means.

Click to enlarge3 transistor 21MHz CW transceiver by JF1OZL
I made CW 1W transceiver with only three transistor. I could make QSO by this machine with Saga, Asahikawa (domestic far distance city),and Indonesia and Taiwan.

Click to enlargeTHE OTAKUCHI / 21MHz QRPp CW Transceiver by JJ1SLW
I checked my QRP note and found interesting note; PIXIE2 modification for the simple small transceiver to fit the case of "TAMAGOCHI", the popular virtual pet. BINGO, that's it!!

Creation date : 13/08/2007 @ 22:26
Last update : 21/09/2020 @ 22:25
Category : 15m Projects
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