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Old 12th Jul 2018, 5:23 pm   #61
Viewmaster
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Join Date: Jul 2016
Location: Ashby de la Zouch, Leicestershire, UK.
Posts: 253
Default Re: Bach with sparks!

The first of the two MIDI converters has been tested OK with a 'scope.
It puts out pulses at the note frequencies and can handle 3 notes at a time.
(Converter kits are from, Eastern Voltage Research, in USA. )

On a speaker a chord sounds OK so should modulate sparks. Pulse width is adjustable.

Second one being made so 6 notes can be handled at a time (3 in bass and
3 in treble clef)

Spark size is reduced now as only one GU81 each creates them.

So, will knock up sometime, a trial full wave voltage doubler to increase EHT to each valve. As current availability is reduced doing this I am getting a 3rd MOT to give it all a shot in the arm....not my arm.

Still awaiting IXDD414CI drivers from China, recommended by, Al.

Running now before I can walk ...…..just created a MIDI file with all the notes on the piano running up the scale on alternate bass/clef. This should eventually show if both sets of sparks can handle it all and what range I should set the converters to.
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