Quoted: He can copy me *fine* by tuning off my op freq 5kHz either direction. If I'm on 146.550, he copies me better on .545 and .555. |
first off, kudos to you for including a lot of equipment info in your post, and also detailing what experiments you ran and their results.
although the VX6R will RX in AM, FM, and WFM mode, unless you are in an FM mode you won't hear the local repeater at all.
this issue sounds suspiciously like one of two things:
(a) overdeviation at the TX end, or
(b) the VX6R inadvertently got set to NBFM ("HALF DEVIATION") while in VFO mode.
i somehow doubt that overdeviation at the TX end is the issue, since it appears with both the FT8800 and the FT857 doing the talking. it's very unlikely that both radios would be hot. it's also unlikely that the same mic is used with both radios, so that rules out an issue with the mic element as well.
so let's go with this theory for a moment...
your friend is probably tuning to the repeater via the VX6R's memory mode.
however, for simplex, he is using VFO mode.
it may be the case that since each memory location sets a lot of the radio's parameters, TX from the VX6R to/from the repeater has the correct deviation. however, switching to VFO mode, you may find that the radio is set for "HALF DEVIATION". see the bottom of page 83 of the VX6R user manual for details on how to check/change this. half deviation is used for MURS and FRS/GMRS, for example, as allocated channels within those bands are quite close together.
losdos.dyndns.org:8080/public/ham/yaesu-vx6r/VX-6R_UserManual.pdfhope all that leads to a solution.
ar-jedi