[R-390] Testing R-390 Mechanical Filters at a swap meet

[Chris Kepus]

What is the "least complicated method"* to test a mechanical filter that is
out of the receiver to determine if it is "good"**.

What is the "absolute simplest and fastest method"** to test a mechanical
filter that is out of the receiver to determine if there is a *high
probability* it is "good"**.

*Assumptions for "least complicated method":
Test equipment available: Signal Generator or variable oscillator capable of
generating a signal at 455 KHz.; VTVM; Frequency counter. Possibly a signal
or dual trace scope. (no spectrum analyzer available) Reference procedure:
http://jlkolb.cts.com/site/MFtest.htm by KK6IL

**Assumptions for "absolute simpliest and fastest method"*: You are at a
swap meet.  You have nothing to test with other than a cigarette lighter, a
cell phone and a Swiss Army knife. (LOL) Keep going >>>> Seriously, what can
you carry with you that will perform a high probability test that will show
the filter is not damaged internally as not to be DOA?  Is there a filter
"continuity" test??  Nothing found on a Google search.

Looking forward to your comments.

Thanks,
Chris
W7JPG