i got a pdc-1 kit a while back just to see how it worked,
seems to work like any active sample/hold pep reading board including birds own pep reading board and this one,
http://www.lnatechnology.com/lnatech_044.htm
the bird unit may be less prone to rf interference when the line section is removed from the case, it also uses dual rail power supply that eats batteries for fun,
i know people have had problems with the inatech board that the bird man sells as an aftermarket option to the expensive bird unit if you remote the line section,
i told a friend to try .001,.01,.1 caps in parallel across the line section connections to the board after he already tried ferrites on the line section cable to no avail,
he did and says it works fine now,
if you buy the pdc-1 it comes with components for a 30ua meter movement as in the bird 43,
i have seen on eham that the resistors shipped with the board are not correct for the 30ua movement due to a wrong calculation by the manufacturer but maybe they sorted that out by now,
the instructions say it will work reasonably with other movements as supplied but if you want the stated accuracy you must know the fullscale ua of your movement and do a calculation to figure out what value is needed for 2 resistors in the circuit,
then calibrate the presets as per instructions,
once done you have something much better than any mickeymouse none active pep meter imho but dont expect super accurate readings, they are only as accurate as the meters basic accuracy and peak board accuracy or inaccuracy combined,
how accurate can an analogue meter really be.
