I just received my very heavy P1324 diffuser and all the parts look great. I like the way it's "mostly" assembled with the risers and strips set into the channels. However since there weren't any printed instructions I was somewhat reluctant to just "flip it over" and dump out all the wooden parts onto the floor.
So, I decided to see if I could figure out what the QRD design was "supposed to be" by inspection and using the QRDUDE.EXE V3.0 app to find the P1324 design pattern.
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For all of you that are curious, the P1324 appears to be a "Standard N13+0,0" type panel (from bottom of QRDUDE), but with a full width edge at depth 0 (usual is half width).
To see this design,
select "Number of wells": 13
select "Deepest 1D well in inches": 2.99
set the "Recommended well width": .74
set the phase wheel and offset both to: 0
QRDude Result: Scatter 1049Hz, Diffuse 2098 Hz, HF cutoff 9052 Hz
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One thing bothered me though, if you then set "Auto-optimise phase wheel rotation for shallowest 1D panel in advanced mode" in QRDUDE, you actually get a different and perhaps more interesting panel. It's EXACTLY the same width and depth, but has a lower scatter and diffuse limit.
Advanced N13+4,3 panel: Shifted down 4 depth units and left 3 well units.
QRDude Result: Scatter 694 Hz, Diffuse 1388 Hz, HF cutoff 9052
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Do you find QRDUDE to be useful / reliable? Is this a possible design improvement? Or was it evaluated and rejected for some reason?
=tkb
P.S.> I did eventually find the online instructions at
https://www.decware.com/newsite/diffuser%20instructions.pdf