TCO-981B8 TCO-981F-12.288MHZ TCO-981F311.605MHz TCO-981H2-10.24MHZ TCO-981K1-19.2MHZ TCO-981T-14.8500MHZ TCO-981T-14.85MHZ TCO-981W1 TCO-981Y2-14MHZ TCO-981Y2-20MHZ