Wednesday, July 10, 2019

Frame antennas for transmitting (multi turn loops) by Peter Parker VK3YE

Don't have much space but want to get on HF? A magnetic loop can be effective. 

A problem in some cases is they need lots of thick heavy metal to be efficient. 

Another approach is to use a longer but thinner conductor wrapped around or supported by a timber frame.  

Efficiency is not necessarily very good but you may still be able to get a signal out, especially if using efficient digital modes like WSPR.  And frame antennas can work very well on receive. 

Here are a couple of 3.5 MHz frame antenna ideas to think about: 

SM0VPO frame antenna for 80m

DL1GSJ 80m frame antenna

You would no doubt be able to redimension them for other bands.

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