Hi Nathan,
congrats on your find! An HX-20 for $10??? Unbelievable...
I just got an HX-20 off eBay -- for triple the price!
It's actually relabeled Taylor-Hobson, with a sticker covering the original label. Weird.
There's also an additional ROM in the spare socket containing an "RTH Terminal Emulator" which you can call up from the menu. I have no idea how to work the thing, all it does is show a title screen and plays an irritating (and endless!) glissando over the beeper. I assume RTH is the acronym for Rank-Taylor-Hobson, since they were apparently part of the Rank Corp. at some time. Anybody know anything about this? Is it possibly a customised unit for the company?
Btw, mine still had its original NiCd's, and they are *dead*, lasting just 5 minutes or so. I'm a bit apprehensive about replacing them with NiMH since they'd require a much higher charging current than the 200mA the HX-20 uses, otherwise charging times would be unbearable. If I replace the original 1100mAh NiCd's with 2400mAh ones, does it make sense to roughly double the charging time to ca. 16 hours, or is there a nonlinear relationship?
Thanks for any info!
--Roland