[TenTec] Omni VII Temperature Control

[Bob McGraw - K4TAX]

While running PSK 31 last evening I experienced a transmitter shut down 2 or 3 times during transmission for no explained reason.  The Omni VII simply went back to receive.  Yep, the rear heat sink was hot.  Power out in the PSK mode was about 40 to 50 watts.  Power supply shutdown did not occur.  DC voltage stayed at 13.8 V and current was below 14 amps, signal from the computer to the radio was present.  OK so I'm long winded.  Today on SSB normal operation and output was observed.  Haven't been back on PSK.  

Is there a high temperature TX shutdown in the radio?  Didn't find anything about it in the book.  I do know there is a "High Current" shutdown in the radio but this will completely shut the radio down requiring one to turn off the POWER and then back on to reset the internal SCR.  Perhaps I'll call TT on Monday and ask.

73
Bob, K4TAX