08-02-2012, 11:37 PM
Thanks for the suggestions guys,
I ruled out the trimmer by opening it to min. capacitance and bypassing it with a modern trimmer which gave the same instability.
I removed the IF coils, tested them, and used a hot air gun to melt out old wax ( and hopefully moisture ) then melted in some new wax.
Will look at bypassing next.
Tried another ' 36' and '44' - much the same.
I ruled out the trimmer by opening it to min. capacitance and bypassing it with a modern trimmer which gave the same instability.
I removed the IF coils, tested them, and used a hot air gun to melt out old wax ( and hopefully moisture ) then melted in some new wax.
Will look at bypassing next.
Tried another ' 36' and '44' - much the same.
