Cool Irock ! I scraped putting the yagi elements in front of the pdl2 as i couldnt get even near a good match and the antenna wouldnt even near resonate where i wanted it to.I ended up putting a quad director in front of the pdl2 to see what it would do.I was able to get it to match and resonate but i think im going a different route.Im building a 4 element direct feed quad..Im using all fiberglass spreaders from the boom on out so there will be no extra added capacitance and i will be able to cut the wire exactly for the target freq.anyway , let me know how it goes for you and i will do the same , Darryl
sob, you could try tuning the driven elements for the pdl2 first without reflector/directors. When you got that close, then start adding the other quad elements, one at a time, and retuning as necessary.
I had a local buddy in the 80's that made a four element quad (not a quagi) using a PDL2 driven element setup and it worked very well. He tried to build it all at once by himself. He took over a year at the effort, but it would not work until he paid a local communications engineer with the Harris County Sheriff's office to set it up right. As far as I know the driven emement was not modified in any way different than the PDL2. This engineer rebuilt the beam just like I described above, get the driven element to tune, and then add the reflector first to tune, and then add the two directors, one at a time, tuning as he went.