[R-390] Testing Collins Mechanical filters:

[Frank Donnelly]

I have an EAC R-390A that I am starting to restore. Before I did 
anything, I replaced a few Caps and turned it on.
It worked, so I decided to do an alignment. all worked fine and it 
performed better after alignment.
But the audio is not very loud.
I then removed all the modules and then ordered some parts, Caps, Res, 
10 turn Pot.
My question is  How do I test the Collins filters? 
When I was doing the alignment, I first Aligned the filter trimmers, and 
on the 16 KC filter I could get no response from either Trimmer Cap.
When I turned it on I noticed a clicking sound when in the 16Kz position.

I may have a bad filter or bad caps, don't know.
Anyone have any ideas?
73  Frank Donnelly  KI0RQ