marcbarker
New Member
what's the purpose of these links? taking ideas on how to improve my FM transmitter?
i got an LM2940-5 i plan to use it so i can see if the power supply gets more steady without any oscillations.
The links were so can see similarities between example designs and to get ideas.
I presume the 'un-regulated supply voltage' transmitter is working better on the freq meter? The 5V reg ones might possibly not have enough RF signal to register, especially if the reg voltage is much lower.
Just a thought about the regulated voltage... AG says on another thread that the circuit can be improved by adding a 1nF across the supply rails at the oscillator. Maybe the regulator is being adversely affected by the RF? It's easy to try out.
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