VFO230.1 th proper diodes to cut for 6-1/4 khz per dial rev. are d19. d20, d22, d23, d24, and d26. i presume cutting diodes d19, d21, d22, d23, d25, and d26 would also work but i will leave that for someone else to try. in other words, of the eight diodes, cut all but d21 and d25 or d20 and d24 fpr 6/14 khz per dial revolution. that7s the end of the story. my vfo-230 now works perfectly at 6-1/4 khz per dial revolution. this jpermits me to use the excellent ts-830s receiver on 160m cw with very extreme if (250 hz) and external audio (50 hz) seletivity. incidentally, i wonder how many repair facilities (including yours) are equipped to motor drive the vfo-230 dial shaft at 300 rpm while observing the optical encoder waveform? this alignment procedure is necessary, and is prescribed in the service manual, before you should expect the encoder to work at slower than the "stock" rate. (i think this was part of the problem). by: dave.......relayed by..n0kgx...gene