Tiny radio refuses to oscillate

413

04:54:16

Minimal Fm radio circuit one can find easily on the internet. The ac supply replaces an electret microphone. It won't oscillate for the life of it tho

published 5 years ago

lmccoig

5 years ago

Need 180 phase shift between collector and base of transistor. Might check for different drawings of circuit.

abobaker

5 years ago

your ac source is shorting the base to ground, no current is flowing through the transistor ... also the simulator accuracy is not enough you need another dummy ac source of about 30MHz not connected to anything

abobaker

5 years ago

https://everycircuit.com/circuit/6528490906845184

schernya

5 years ago

@edmeme you've missed a bit with tank central frequency and transitor's base is grounded via signal source. Here's alternative: http://everycircuit.com/circuit/6244242656329728

edmeme

5 years ago

@abobaker ooh, so tge simulator limis the time-stepping according to the frequency of the ac? Thanks for the tip :)

BillyT

5 years ago

http://everycircuit.com/circuit/6528490906845184

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