Originally posted by: Madwand1
There's a very long thread on this topic on the DD-WRT forums. Note that the behaviour of different firmware differs in this respect. What's true for native isn't the same as for DD-WRT v23 SP1, which isn't the same as for DD-WRT SP2.
From what I gather, SP1 didn't know about the HP, and so you had to be careful with the output power setting on that one. On SP2, you can bump up the power, and some suggest 84 for a practical max, just as with the non-HP version.
http://www.dd-wrt.com/phpBB2/viewtopic.php?t=11748