[SignalOne] CX11A filter questions.

[Ed Tanton]

Passband Side(s) of CF?

At 05:42 PM 2006-01-07, Dr. J. R. Sheller wrote:

>This list is for discussions regarding collecting, repair, use and 
>sale of Signal/One radios and accessories.
>Documentation on Signal/One radios can be found at 
>http://www.hamanuals.com and several other sites on the Web.
>I now again have a CX11A . SN10649701..I am going thru it and 
>installing all of Paul's mods.  At this point I have some 
>questions.  The schematics all show FL1 as the  small almost square 
>unit.. FL2 and FL3 as the units mounted flat on the outside edge of 
>A8, the IF board.  FL4 should be the CW2 filter mounted on the 
>bracket above FL1, and  FL5
>would the CW3 filter mounted on the bracket above FL2.
>
>I assumed that FL2 and FL3..because they were indentical .. would be 
>cascaded.. according to the schematics, they are not.  FL1 and FL2 
>are cascaded in  AM, USB and LSB. while FL1 and FL3 are cascaded in 
>CW1... I must getting dense n my old age, but this does not make sense to me.
>Can somebody explain?
>
>My unit had both a 400hz Blue Tyco and a 300hz Silver color unit 
>made by Crystal D???????.
>The ink is smeared and cannot read the entire name.  The 400hz unit 
>is installed in CW3 and the 300hz unit is in position CW2.  I would 
>think this is backward.  My unit has the IF amp installed..it 
>appears factory, but it is installed on the CW2 filter [300 
>hz]..  Do both filters, the 300 and 400 hz need an amp?..  I have 
>laid out an amp board, but dont really want ot burn it and etch it 
>if I dont need a second one.
>///snip

72/73 Ed Tanton N4XY <n4xy at earthlink.net>
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