Is it normal to see some instability while tuning the rf and osc/mult section of the Mastr II? The unit is similar to the front end of the Exec II and I have tuned lots of those with no sign of instability but my first Mastr II does. The tuning of C305 seems to really set it off. The unit is 150.8-174mhz package. On first try I could not get a signal through it. I changed the G8 pre selector with a G7 from a exec II and still no joy. I then modified the osc/mult section according to the article in the Repeater Builder files and it came to life. But, at time Q402 in the osc/mult cct gets very hot. and there is some instability. The Osc/Mult seems to tune the way it should, and so does the first two helical. The unit was originally tuned to a MTS channel in the 150 mhz range and checked out fine before putting the new xtals in...
Does anyone have any comments about this ?? Thanks Doug
