[Amps] Solid state amps

[Carcia, Francis A HS]

Hi all,
I've collected parts to do 9 push pull MRF150 stages and someday maybe I
will assemble. The boards will
be modified ENI surplus. I found ENI transformers don't work well below 7
MHz. and the typical type 43
sleeve doesn't work well below 3 MHz. I found it takes 2 sleeves in series
to get minimum primary inductance
on 160 meters. These are the .875 inch O.D. sleeves. I wonder if anyone has
also noticed this on 160 M.
I have also seen this with CCI kits. I plan to run DC through the
transformer because I found it forces a better
balance with MRF429 bipolars. Frank, WA1GFZ