Is it forbidden to speak between putting on the arm tefillin and the head tefillin?

Synopsis

The Mechaber forbids speaking between arm and head tefillin; if one spoke, he recites an additional blessing on the head tefillin. The Rema states that Ashkenazim, who already recite two blessings, must recite both blessings again on the head tefillin if they interrupted.

Early Acharonim
Late Acharonim
Lenient
Strict
Lesser cited
Major authority

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