[Kenwood] 870 audio through ACC2, and filter width questions...

[Duncan Cameron]

Hi a snowy coast of Maine.
I have two questions.
To send mic audio through the back of the 870 (through the ACC2), what pins 
are used for the mic audio and mic ground, and what pins are used for the 
PTT?
Second Question-what is the width of the filters in the 870? They are listed 
as XF1-(part #L71-0401-05), XF2--(part #L71-0235-05)and XF3-(part 
#L71-0266-05)
The follow-up question.....can these filters be replaced to improve the 870, 
and what would you recommend as replacements? I am assuming the carrier 
points would to be readjusted with a replacement of the filters.
Thanks for any tips, suggestions, or help you can offer.
Regards,
Scott Cameron

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