[TenTec] termination Z

[g3ory at lineone.net]

Paul,

If you are really stuck here you might be able to work backwards to 
find out the answer. This only applies to ladder filters but there is 
an excellent design program by G3UUR on the Warrington Radio  Club 
website.  I assume you know the frequency of the crystals used. Guess 
from measurements on similar crystals of the same frequency (or close), 
the crystal parameters such as series C, series L and the parallel C of 
the holder. Run the design program and it comes up with the values of 
the capacitors needed plus the terminating resistance required.  If the 
capacitors used by Ten Tec are close then you are onto a winner.



If the filter is not a ladder filter then all the above is rubbish!!!



Good luck



73 Bob

G3ORY



>----Original Message----

>From: elespe at lisco.com

>Date: 07/11/2014 18:11 

>To: <tentec at contesting.com>

>Subj: [TenTec] termination Z

>

>Does anyone know the proper terminating impedance for the crystal 
filters utilized in OMNI VI?

>

>I have some assorted filters from both if frequencies  I would like to 
evaluate

>Thanks

>

>Paul K0UYA

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