[TenTec] QSK Bug in O2 2.031

[Ron Castro]

It gets curiouser and curiouser!  TT says you shouldn't switch more than 15 V on the Key out, however, the schematic (A0, 81908_5.pdf) shows the switching for Amp 1 is done with Q29, an MJE50 NPN transistor, which is good to switch more than 200 V.  There is a CMR1-10 general purpose diode (D111) across the emitter and collector which is rated at 1,000 volts!  Switching 24 - 28 VDC should be no problem if there is no large current.  Maybe a reed relay or switching transistor is needed to interface.

That still doesn't explain what went wrong in 2.031.

I am loading back 2.031 and going to PTT until I hear back from TT service.

Ron