[Drake] TR7 filter

[HENRY PFIZENMAYER]

TR7 Gurus ....

I notice that my  300 cycle filter position seems to be getting more lossy
with time
... Is this a known thing with the 300 cycle filter over a long period ????
It is 4 to 5 db more lossy than the 500/1.8/2.3 khz filters now.

Guess it is not inconceivable (maybe even more likely) that one or more of
the MPN3404 switching Pin diodes associated with the 300 cycle filter is not
up to snuff .. Anyone seen this before I rip this thing open again and pull
the filter board to check ?

I have a R7 receiver and the 300 cycle filter in that receiver seems to be
the same as the 4.0, 2.3 and 1.8 khz filters  (The 500 cycle filter in my R7
is about 3 to 4 db less lossy than any of the other filters) .