I have never heard of this but you have certainly peaked my interest! I have a 1946 resonator that I would love to put a pickup in without too much alteration...I'll look into it. Have you heard much about the Fishman pickups for resonators...I haven't but they do have a great reputation and aren't too intrusive looking. Edward
Just found this thread where people are talking about the hot plate plus there is one shot with a pickup attached to the plate in an interesting way...I am not too fond of the jack placement though! These all look like electric pickups and not the acoustic kind I am researching. I did note that some of these in the pioctures are single coil and some are humbuckers, which makes a big difference inthe sound! Here is the link:
I sent my National Radio Bendaway, and tricone to National and had them install a Hylander PU. They are very true to sound and just boom. Contact Jason Workman at National.
I ordered a hot plate from Mike Dowling a year ago and installed it on my brown National Delphi (named Brownie Mcgee). I love the sound of it and the plug and play ability. It sounds very true to sound if you run it thru a good acoustic amp like my acoustasonic sfx. It is a passive magnetic, so you have to spin up the volume a little bit. My other 3 Nationals have Hylanders, so they require a committed channel and the active box, but are great sounding and big volume. Hope this helps.
There are some resonator demo tracks on my solo web site:
Hope this helps.