[Elecraft] Internal tuner with random wire

[Bob McGraw K4TAX]

The comments are good .  But considering all the pluses and minuses, wouldn’t it make more sense to use a OCFD and not worry about ground rods, counterpoise needs, high SWR, high voltage and currents in the tuner?   A well designed OCFD with correct Balun plus a common mode choke at the feed point and another at the radio will cover 80M - 10M with much less than a 10:1 SWR. 

A matched condition exists only between the ATU input and the PA output. The output voltage or current can be all over the place, including inside the ATU circuits.   And the ATU has a 10:1 matching range of 5 ohms to 500 ohms.  Random wires can easily be outside of this range.  Thus the ATU can not effectively match the load.  

Bob, K4TAX


Sent from my iPhone