[Milsurplus] ARC-5 Dynamotor

[roy wildermuth]

Hello

I recently acquired the MD-7 Plate modulator unit. Up to now, I have been
using the screen modulator unit.  Are these interchangeable ?  I currently
use the 274N units, the unpainted aluminium ones. Should I use my ARC-5 ,
the black crinkle ones instead with the Md-7 or does it make a difference ?

 I am  afraid I have been guilty of assuming that all of these units were
Arc-5.

Roy W