[TenTec] Help Needed to Identify Filter

[John Huffman]

I'm trying to help an older ham get his Corsair I up and running.  His filter in 
the second slot is marked "48075" on one crystal and "8314" on another.

Is this the 1.8 MHz filter?

Does it matter which way the filter is plugged in or is it bi-directional?

Is there an easy way to see if it is defective?

Thanks in advance and please reply direct hjohnc at core dot com.

73 de NA8M
John