Q3 is a ZVP3306 - https://www.adafruit.com/partfinder/transistors#mosfet
A couple of our more advanced Ice-Tube hacker/customers have been experimenting with some other options for Q3. Some of these appear quite promising, if you want to try. viewtopic.php?f=41&t=51283
very low brightness (ICE Tube)
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- adafruit_support_bill
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- russell 27
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Re: very low brightness (ICE Tube)
If you have a PNP laying around you might want to try this, in lieu of or waiting on a different Field effect. I had good result with this. I recommend you look at a BS250 or ZVP2110A as an alternative.
- adafruit_support_bill
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Re: very low brightness (ICE Tube)
Thanks Russell27. I was hoping you or Jarchie would chime in :)
Please be positive and constructive with your questions and comments.