[TenTec] Identification of filters in my Corsair

[James Duffer]

I am wanting the Ten-Tec idntification of the crystal filters in my Corsair.

On the PBT 80979 Rev A board the .25 position.  I have a 6 pole filter with 
two banks of three each crystals.  On one crystal on one bank is stamped 
48054.  On the other bank of three, two crystals have the following:  one 
has NSI, another has 84-05.  What is the 3 number Ten-Tec part for this 
filter?

In the 0.5 position of the board another 6 pole filter with the following 
stamped on the crystals 48053, NSI, 84-04.  Similar to the .25 filter.  What 
is this Ten-Tec number:

In the 2.4 position an eight (8) pole crystal filter is marked 48074, NSI, 
84-01.  What is the Ten-Tec filter number for this filter?

On the board 80977 is an 8 pole filter with a crystal stamped 8321 and 
another stamped in black ink 220.  I believe the 220 is the Ten-Tec number 
for this particular filter.  If not please enlighten me.

I just sold a Corsair recently and the filters were plainly marked with 3 
digit numbers.  I am wondering what is the deal with these filters.

Thanks in advance for any information.

73, Jim de wd4air