Interesting. I am also having the same bypass issue, but only when I am using fldigi to send some message. 80m is the worst example, and is totally useless. In addition I am using the HF-AUTO tuner, which is always showing an SWR in the range 1.05 to 1.1, and the amp is showing SWR in the range of 1.2 to 1.3 when things are working correctly, but it does jump up to 1.8 and then instantly goes into bypass mode. Major PITA. Discussions with Mark did not elicit any comments about this being a known problem, basically stated it had something to do with my antenna, but I could always send the units in to be checked out. Also I tried adding a Palomar (?) choke balun to see if that helped (I already have a loop of coax at the antenna and many beads at both ends) and that made no difference other than to increase my normal SWR about .02 or so. Tried skipping the HF-AUTO and my antenna is natively about 1.6, and it still kicks out.
Sadly I have stopped recommending this equipment to others because of this issue. They are good units, and as this group has shown they are not the only ones that do this, but denying the problem will not help get things solved. SSB works fine here with no issues of this nature. Also my local HRO has sold the identical equipment (2 set-ups!) to another ham, and he has no problems, but I am not sure if he is doing any digital modes.
Al? KD2PNR
