03-06-2014, 10:54 PM
(03-06-2014, 07:37 PM)singlepentode69 Wrote: When I touch the glass envelope the signal gets stronger. I do not possess an oscilloscope. Is there another way to test if the oscillator is working?
Regards robin
Assuming that the local oscillator is a triode - which is most usual, although what follows should apply to a pentode - measure the voltage on the control grid with a high impedance d.c. meter: you will see a negative voltage - typically between -2 and -10 v. - if it is oscillating.
Al.
