[TCML] Home-made modulation transformer/guitar-driver (VTTC)
chriskarr4 at hotmail.com
Thu Apr 22 22:01:10 MDT 2010
In a MOT-powered VTTC, would it suffice to make a modulation transformer out of, essentially, another MOT (driven by a 100W guitar amplifier)? If so, would using the original secondary winding and a new primary winding - with fewer turns - be the preferred method? This would, of course, be placed with the bias of the guitar amplifier opposing the flow of anode-current.
Assuming this might work, in the first place, how might one 'force' the VTTC to respond only to their amplifier, in order to prevent the 'hiss' of CW 'sparks?' A biasing DC supply saturating the core on the primary side? Or would this even be necessary, since the high-voltage DC energy from the primary circuit of the VTTC would saturate the core? Perhaps the varying current-draw would act to cause flux-collapsion?
Or, perhaps using an IGBT rated at 600V on the grid-circuit is the only reasonable option?
Perhaps a pair of IGBTs (rated at 1200V each) with their collectors and emitters in series and gates in parallel is a possibility for post-tube (high-side?) modulation..
Input and knowledge is very much appreciated, everyone!
- Christopher Karr
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