default encrypt to multiple keys

[Olav Seyfarth]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: RIPEMD160

In gpg.conf I have set these two options
default-key 2C8E43DAEBB23B3E668AF459A197DF6B6AE1EF56
default-recipient-self

These worked fine for one key. I now want to use two, in other words: every
message and file I encrypt shall also be encrypted to BOTH my private keys
(one card based, one Smartphone). What would be the best way to achieve this?

Olav
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2
Comment: Dies ist eine elektronische Signatur - http://www.enigmail.net/
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=dtJ3
-----END PGP SIGNATURE-----