Prescaller devide by 10 with IC CMOS 74HCT390

By using IC CMOS 74HCT390 we can make the cheap prescaller.
Datasheet IC can download here.

Figure above is 74HCT390 logic symbol

This Prescaller I have tried and use the Frequency counters that measure the ability for HF Frequency counter (0-30MHz) can also be used to measure the frequency VHF (30-300MHz).
To measure the small signal circuit will be added buffer / pre-amp before the signal is inserted into prescaller.
Design construction can use PCB assembly or perforated with ugly style that all these prescaller circuit can be added to the box Freq counter and switches can be added to the measurement of the input frequency HF or VHF.
Need to be careful in the construction, make sure the connection is especially true in the provision of the CMOS voltage must be stable 5V. I've ruined this IC because there is over-voltage.