Dr. Z Air Brake - home made?

[das234]

I've seen a couple posts that mention home made versions of the Dr. Z Air Brake attenuator.  Does someone out there have experience building one of these from a reliable plan? 

[steveperiod]

I built one using this layout:

https://www.dropbox.com/s/3xy018taaexhoe6/attenuator_layout_final_195.pdf


Can't remember where I got it from originally, but I followed it and had good results. I skipped the rheostat portion as the bedroom level option didn't interest me very much. Mine ended up being mounted inside the cabinet of a 2x12 18 watt Marshall clone I built. I used it pretty much all the time to knock a few dBs off the amp.