Free radio pirates on medium and short wave messageboard of alfa lima

The transmitter is being built and all I need is to get the finals rigged up. I have been doing a lot of SWLing for unused frequencies and plan to choose the obscure freq. of 6666kc exact (is this an okay freq?). VFOs are a Godsend eh? Really who needs crystals in the guts of a tx when if you really...