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VTTC first sound :-)
Original poster: "Herwig Roscher by way of Terry Fritz <twftesla-at-uswest-dot-net>" <herwig.roscher-at-gmx.de>
Hi fellow VTTC builders,
Today I audiomodulated of my system for the first time. I used a 20
W car amplifier/equalizer driven by a signal generator. A 12/230 V
mains transformer was connected between grid coil and grid leak
combination. No other modifications were necessary.
Connecting the scope across a 4-turn-pickup coil wound 3.5" below
the primary, I easily could adjust the amplitude of the signal
generator to a point, where the amplitude modulation was just 100
%. Deafening noise forced me to use ear protection. Sweeping the
modulation frequency I had to state, that the frequency response of
the mains xformer (like suspected) was dissapointing. So I'm
looking for an output tranny of a tube amplifier now.
Still a lot of work to do, but a lot of fun as well.