I am still not getting much power out of the omni...so far I have disconnected
the input to the PA and measured direct out from the Low Level Driver
(LLD)...almost nothing to measure even on the 5 watt scale...yet, when going
thru the PA and adjusting the final PA bias on the control board, I can get
close to 4 watts which seems to indicate the PA is taking the very very low
input and bringing it up to that level...problem is I am drawing about 8 amps
to get 4 watts!
I tried replacing the mrf476 on the LLD with an equiv 2166 and no diff...I
also replaced the two other transistors on the LLD with a 2n3503 (or
I even went further back to the OT board (the stage before the LLD) and swapped
out those transistors...no change at all.
When I transmit into a dummy load for a few seconds the transistors on the low
level driver do get warm, yet I again, cant measure anything really from the
Any suggestions? I am thinking perhaps switching out the diodes on the LLD next
but I am really taking a shotgun approach here. As always, your collective
wisdom/comments are welcome...If TEN-TEC has time perhaps they can shed some
light as well next week.
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