Replaced T2 with another transistor Blw29
T2 gets hot but does not need a heatsink
getting 1- 1 1/2 watts out of it
I find this difficult to tune.
could the tuning capacitor be replaced with one of a smaller value
perhaps in parallel with another capicitor
I want to run this at 88Mhz. What...
This problem seems to be with the oscillator
power measured at point between osc and amp
T1 has no heatsink!
Can anything else cause this problem?
can tune roughly
Made a heatsink out of a section of thick (3mm) copper tubing lower section fits over T2 6 vertical cuts made from top 20 mm long, pieces bent 90 degrees to tubing.
small fan from cpu wired to top of heatsink
Using rundown 9v battery for power while tuning
Difficult, trimmers small even...
I build this circuit However T2 always seems to burn out
after a few seconds even with heatsink! Is there a nother transister that would be good as replacement?