You will want to replace all the electrolytics in the rear apron mounted
audio board.
If you can find the xtal calibrator, it is a nice addition.
One of the flaws in this rig (and the SBE SB-34, and likely many other BA
xcvrs) is they have one adjustment that is to equalize the VFO for RX and
TX. This can only be done on one freq- above and below, there will be an
increasing delta between the two- w/o an RIT, this is problematical.
The 2 planetary drives in series always seem to develop backlash over
time- keep them lubricated and reduce friction along the drive train as
much as possible.
Wonderful looking rigs though.

Dale W4OP


In addition:

Replace any waxed/paper caps (typically used in coupling of stages, cathode
bypass, etc). And check all the carbon composition resistors for tolerance.
They tend to drift higher. If you replace any resistors use a non inductive
resistor (carbon compositions) in circuits above....say...18mhz or less.
Mica and ceramic caps should be OK. They age well over time.

See these pages of my experiences for some possible tips from different
gear.
http://www.ppinyot.com/H/hammarlund.htm transmitter.
http://www.ppinyot.com/N/national/national.htm Rcvr
http://www.ppinyot.com/H/sx_71.htm Rcvr.

Good Luck,

Paul P