Michael Black wrote:
On Thu, 24 Jul 2014, Barry OGrady wrote:

I recently obtained a Yaesu FTDX-400. I have operation and
service manuals but I can't find how to add bands.

Well there are no diodes to clip on that baby, if that's what
you're asking.

You'll have to take out the bandswitch, put in a new one with more
positions, then add any needed coils and crystals for the new bands.

Look at the manual. The bandswitch, crystal holders and probably most
of the needed coils are already in place. It's mostly a matter of crystals
and either coils or adding jumpers to the existing coil networks.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."