Dual (multiple) frequency beacon

[Quinta]

Because propagation changing from day to night i try to make dual frequency and simple transmitter for qrp beacon. I try diode commutator and it works.
Beacon powered from 5v 350 ma solar panel and 3V 6A/H lifepo accumulator. Because my controller know voltage on solar panel he will switch frequency on twilight and dawn, it even can be done by primitive voltage comparator, without any programming

[Teotwaki]

Possibly use a half wave end fed that could resonate at a few frequencies. Also try a simple AD9833 DDS board instead of crystals to allow for multiple frequencies to be controlled by the ATtiny chip