[O] buffer-wide tangle filename

[Julian Burgos]

Hello everyone,
This may be a very simple question.  I want to tangle multiple source code
blocks into a single file.  Instead of using the same output filename as a
block header (e.g. :tangle output.el) in each code block, can I I define a
buffer-wide tangle filename?  Something like this (which does not work)?

#+PROPERTY :tangle output.el


Any ideas?

Julian