Galaxy schematic-959 duel final

[Larry A McClanahan]

For those trying to get more out of a single mos fet final converted to dual final, As in the DX959, replace Q52 with a 2SC1973. Replace R-253 with a 22 Ω. Adjust L40 and power

 

[rabbiporkchop]

This is the holy Grail for the Galaxy 959.

 

[Larry A McClanahan]

Good transistor but can't drop it in to a mosfet circuit. The 2sc1973 Replacement doesn't even have to have the resistor replaced. You can just retune the can and get better performance.

 

[Eldorado828]

I attempted dual finals long ago with a mosfet 959 and if I remember it wasn't anything special when it was finished. Between 35 to 40 pep so it really wasn't worth the work in my case. Later I did a 939 mosfet and it did much better but maybe because there's some capacitance differences being it's am only. For me it turned better results converting the old 3600 boards from single bipolar to dual mosfets once the bipolars got too pricey.

 

[Larry A McClanahan]

I attempted dual finals long ago with a mosfet 959 and if I remember it wasn't anything special when it was finished. Between 35 to 40 pep so it really wasn't worth the work in my case. Later I did a 939 mosfet and it did much better but maybe because there's some capacitance differences being it's am only. For me it turned better results converting the old 3600 boards from single bipolar to dual mosfets once the bipolars got too pricey.

I run something that most would hit with a driver. I don't want to do that. 40+ watts works for me. Switching to the 2SC1973 Will increase the output of each transistor in the RF chain.
I am gathering the components to add a second transistor.