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It depends on your goals as to what is suggested. First thing I would do, As I am doing now with my 1600, is to independently fuse each pair of transistors. Also upgrade the bias network to keep it stable and in AB. currently they will shift into class C due to poor regulation as the heat increases. Also, not sure on yours, but the incoming negative power lead is daisy chained on my dx1600, I am going to run independent leads to each board from a terminal. If your worried about spectral purity, a bandpass filter on the output wouldnt hurt. Theres alot you can do....Just need to know for what use.

Also, using a keyline is a VERY good mod to do, and get away from RF keying!

[QUOTE="dxhound, post: 200281, member: 2167"] It depends on your goals as to what is suggested. First thing I would do, As I am doing now with my 1600, is to independently fuse each pair of transistors. Also upgrade the bias network to keep it stable and in AB. currently they will shift into class C due to poor regulation as the heat increases. Also, not sure on yours, but the incoming negative power lead is daisy chained on my dx1600, I am going to run independent leads to each board from a terminal. If your worried about spectral purity, a bandpass filter on the output wouldnt hurt. Theres alot you can do....Just need to know for what use. Also, using a keyline is a VERY good mod to do, and get away from RF keying! [/QUOTE]

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