Dan:
Thanks for taking a look at this.
Ahha! I didn't notice until you asked about channel #39, but Chrip doesn't display that row in the tabulated data! That's why I didn't see that frequency occuring.
Anyway, the radio is already programmed in memory, with channel #39 at 451.724 MHz, as I received it used from the previous owner.
The radio does display this frequency! This frequency is within the specified range of coverage of the radio (Rx only). However, when I tune the VFO near it, using the knob or up/down arrow keys, I can only reach 451.720 and 451.725 MHz, i.e., 5 kHz steps, consistent with the minimum channel step specification. Also, I cannot tune the VFO to 451.724 by direct keyboard entry. It balks at the '4' and will only take '0' or '5', consistent with the 5kHz steps. P.S. My tuning step size was set to 5 kHz. When I set steps to 'Auto', the entry 451.72 auto completes as 451.725, and the step size at that frequency is 12.5 kHz (shows 12/13 rounded).
I recently had a brief exchange with the previous owner, and he mentioned that he used a G4HFQ program (FTBVX8 I assume) to manage the memories. Perhaps that program allows this frequency setting. I have't tried it. I'm not sure what frequency the radio actually tunes, despite the display value. I doubt I can check that accurately (i.e., is it capable of 'in between step' tuning, at 451.724 MHz?).
I will try to delete this channel setting in memory, and rerun Chirp without the (alleged) bogus value. I don't need it, afaik. I'll get back to you on how that goes.
With sincere respect for your limited development time and need to prioritize; there appear to be some opportunities to tweak Chirp, to be more informative and robust under the circumstances. E.G., Beginner's help warning this sort of mishap could occur (weak), notification of 'bad' frequency value after cloning download (fair), show the data received but flag it 'bad' and ignore it (better), skip a 'bad' value on export and cloning upload and keep on chugging (good with former flag), maybe force a round-off to the nearest 'good' value (could be troublesome ass-u-me-ing right value), etc.
Thanks again for taking a look at this. I will keep watching Chirp with interest and experiment the best I can on my VX-8R.
Steve