[ARC5] SCR274 improved with zener or glow tube?

[J Mcvey]

I have been thinking of how to further iron the chirp out of my CW on the 12V converted system.Getting a better 12 dyno helped somewhat, but there is still more chirp than I want to hear.  In fact I'd call it more of a slur or whoop.The first key down is the worst, but if I keep a steady CW flow going, it averages the supply voltage and it sounds better.
One of the non-standard things here is that I use the leakage radiation into the rx to monitor. I can still do it this way when I get the modulator set up (28v) by simply omitting the sidetone cable for the bc456 that switches the audio. Good idea, or not?

Has anyone tried a zener or glow tube to regulate the the OSC supply? Did it work?I have heard old MOPA rigs that only had a hint of chirp which is fine by me. How do I attain this goal?
Jim, AC2EU
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