Getting test gear ready for Field Day Antenna ops.  A frequency counter increases the accuracy of and really improves the utility of the MFJ-207.   My MFJ-207 was a ham fest special for $10 but had a bad FET. Freq Counter came from ePay. Black rubber bands (Stealth Bands) are fashioned out of a bicycle inner tube.  BTW the MFJ-207 has an output for a frequency counter so a  mod was not necessary. Plenty of output to drive the counter. Also can be used as a emergency signal generator. Pic attached in case video does not make it.
Z