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[aprssig] TAPR deviation meter question

Alan P. Biddle APBIDDLE at UNITED.NET
Tue Jan 29 17:53:36 UTC 2008


Hi,

A ham working on an APRS application, so this is tenuously on topic, has an
old TAPR deviation meter, using the RS PRO-59 scanner.  He sent me the
following question:

Question, is the TAPR device really connected to the discriminator or 
after a de-emphasis network.  I cannot find a 
PRO-59 schematic anywhere, at least so far.  The TAPR instructions 
tell where to connect it on the board.  Looks sort of like a discriminator.

My recollection is that he is right, and there is no twist imposed by the
PRO-59 to the tone amplitudes measured.  Anyone remember back that far?

73s,

Alan
WA4SCA









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