[TenTec] Ten Tec Model 405 amp

[Curt]

I owned one of these awhile ago, there is an RC circuit incorporating the 
delay potentiometer that determines the hold time.  The capacitor in mine 
had failed, not wanting to foul things up, I just sent it to Ten Tec.  They 
fixed it and checked everything else out for $60.  I used it for awhile 
afterward, but since had lot of QRO and QRP rigs, a 50W amp didn't fill a 
need for me.  My advice, send it back to Ten Tec and let them fix it for 
you.

73, Curt