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It is pretty funny picturing those kilowatt capable match boxes on a picnic table beside a diminutive QRP xcvr.? But food for thought:? The QRO guys build those big clunky (but low loss) boxes and run ladder line because 1% loss when running legal limit is still 10's of watts burned up in heat somewhere and things will literally melt, otherwise those QRO types probably wouldn't care about losing 1% of their power or maybe even 10% if it didn't hurt anything, but something I've always considered is when you are starting out with a few precious watts you should be as concerned about loss as the QRO crowd, but how many examples do we see of equipment used for QRP that doesn't give much consideration to loss.? Tuners using those plastic "polyvaricon" AM tuning capacitors (with a Q factor of about 30! according to W7ZOI's tests) small transformer cores or cores of unsuitable permeability (the cores don't noticably heat up because the power is low) long lossy feedlines to save weight like RG-174, etc etc.? Maybe it's just my OCD but I think as QRP operators we should consider these anciliary parts of our station with the same care and concern for loss as the QRO folks.? So yeah get those Johnson matchboxes out and run some open wire line! Unless you are climbing a mountain, why not? Joe ve3vxo On Sat, Apr 6, 2019 at 12:26 PM Bill Cromwell <wrcromwell@...> wrote: Hi R. Tyson, |
