Hi Paul (Sherwin),
Do you have any trouble with instability?
The only way I can get the thing to stop oscillating (e.g. as evidenced by fairly broadband whistling on the SW bands) is by specially selecting a trannie for
low gain
Other things I've tried:
0.1uF power rail decoupler close up to Tr1
100ohm blocker in series with output
reduce power supply to 3v
change bias resistance to 100k (more negative feedback)
earth tap or bottom of coil (feeding base thru' 0.02uF)
feeding from hot end of tuning coil (thru' 0.02) [don't worry about loading the coil - slightly damped response wd probably be easier anyway!]
output to coax vice hook-up wire
I'm running out of ideas!
dave