Monday, September 9, 2019

A quick repair of a QRP antenna coupler

A short video on a small repair I did to a previously reliable QRP antenna coupler. 

There's a few lessons in this. 

Most notable is that components can sometimes partially fail and become intermittent. Such faults can't necessarily be picked up by simple multimeter tests that would otherwise suffice most of the time. 

Also it's worth rethinking the use of small  RF chokes as inductors even in QRP antenna couplers if you're using them to run continuous duty cycle digital modes as I believe it was them that caused the fault. Possible substitutes include going back to iron powder toroids like the T50-2 or T50-6. 

PS: Want to know more about QRP? You need Minimum QRP. It's a top selling manual on success with low power amateur radio. Available in ebook or paperback formats you can find out more here

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