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dominicbeesley · 20th Mar 2008, 2:27 pm

Hi Kalee,

Sorry if that bit of the circuit isn't very clear!

The feedback currently goes from the cathode follower to the unbypassed cathode bias resistor of the first AF stage. The diodes clamp and rectify the AF signal into a PPM consisting the magic eye valve.

The feedback circuit is very much a temporary measure, so's I can listen to some nice music while I work! In the final circuit it will go from the coax output through a rectifier, low pass filter and back to the grid of V1. The cathode follower through to magic eye with diodes etc will remain for the simple PPM.

Dom

20th Mar 2008, 2:27 pm	#86
dominicbeesley Octode Join Date: Nov 2004 Location: Hebden Bridge, West Yorkshire, UK. Posts: 1,885	Re: AM Micro Transmitter Hi Kalee, Sorry if that bit of the circuit isn't very clear! The feedback currently goes from the cathode follower to the unbypassed cathode bias resistor of the first AF stage. The diodes clamp and rectify the AF signal into a PPM consisting the magic eye valve. The feedback circuit is very much a temporary measure, so's I can listen to some nice music while I work! In the final circuit it will go from the coax output through a rectifier, low pass filter and back to the grid of V1. The cathode follower through to magic eye with diodes etc will remain for the simple PPM. Dom