[R-390] Best way to mount rack rails

[NE7X@aol.com]

I have both a R-390A and SP-600 receivers which
I would like to mount into a 6 ft tall x 19" wide
standard rack cabinet. I have ball-bearing slide rails,
however the rail mounting holes (standard 19" rack
item) do not match up to the screws/holes on either
side of the radios. Matter of fact, the R-390A doesn=92t
even look like there are any threaded holes at all for
mounting rack rails.

How were these receives mounted into racks when used
in the military? I don't believe all the weight of=20
these very heavy receivers was all place entirely on
just the front panel. Was it????
=20
One alternative is to use rack shelving, however this
will cause blockage within the cabinet and not allow
a "flush" front mount to the rack cabinet due to the
front shelving mounting screws which will petard
behind the receivers=92 front panels.=20

Any rack rail mounting suggestions would be appreciated.
Thanks and 73s, Tom NE7X...