How to map the key above the Enter key to send ctl-H?

[Charles Smith]

In

https://lists.ubuntu.com/archives/ubuntu-users/2009-May/182902.html

Mr. Vranos says:
 I think you need to change your keyboard model at System|Preferences|Keyboard|Keyboard model.

I tried several - od -tx1 always yields ^? for the backspace key (i.e. above the Enter).  The mostly bet would be pc 105 intl, but that doesn't do it.