Saturday 10 September 2016

Orange AD200b MkIII (On Hold)

Up next in the tube preamp series, I give you the Orange AD200B MkIII. This is the current production AD200B, which has a few changes compared to the MkI, which is why I figured it would be a good idea to make a layout for this version as well. Similar to the MkI, the MkIII is known for great clean, with a focused midrange, but has great grit with the gain cranked.

Unlike the Sunn Model T, this has not been breadboarded and tested out, I just followed the same concepts Ciaran and I used to convert the Model T preamp to use FETs. This means at this point, there may need to be some tweaking to component values to get it just right.


Edit: Putting this on hold until i can get some time to breadboard it and get it sounding right.

2 comments:

  1. Hi ciaran, why is the passiv Input going to drain? The Bernard d'Uur schematicof the mkiii says something diefferent.b oth Inputs are going to Gate. Could you pls help and explain.
    I also count only 9 holes.

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  2. Love this preamp, looking forward to the final version!

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