So Daniel, as an example. If we produce 5W RF, and 0.56W is reflected (2:1 VSWR), we have 5.56W RF to deal with, in addition to the DC dissipation.
Let's say we DO dissipate 3.3W across all four BS170s, then at 2:1 VSWR, that's 8.86W across all four transistors, or, 2.215W per transistor!
As you said, very little room for reflected power. But that contradicts what you said! HOWEVER, you said LESS than 5W of RF, and reducing RF means reducing Vcc and thus the DC dissipation too, a double whammy in either direction.
So your QDX is perfectly happy at 2:1 under these circumstances.
John
KC1IDN
