Re: Possible QMX/QDX PA Improvement Idea
|
Hi Tony
In my experience, practically there are undesirable effects including loss of bandwidth (meaning reduced power at higher frequencies), lower power output and lower efficiency. It's my opinion that AC coupling would cause more problems than it would solve.?
73 Hans G0UPL
It occurred to me that the Interface between the ACT08 drivers and the BS170 gates could be AC coupled. A quick simulation with 100nf and a 2k to ground on the gates shows no ill effects. The advantage is two-fold. First, a BS170 failure that puts 12V on the gates is less likely to damage the ACT08 outputs. Second, any failure that leaves the ACT08 outputs high for a long time is less likely to fry the BS170s.?
?
Just a thought.
?
Tony
AD0VC
|
