Quote:
Originally Posted by Dave Moll
Surely, a purple glow requires argon. Neon gives an orangy pink.
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Dig out a decently-powerul VHF transmitter, hook up a dummy-load, dangle your neon glowbottle into its PA and hit transmit.
You'll get purpleness.
Trust me on this.
In times-past the colour-of-glow from your neon-dipstick was a reliable indication of whether the parasitic-oscillations in the amplifier-you-were-debugging were VHF or LF.