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- 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
-