[TenTec] IC part types - was Orion prototype

[jimr.reid@verizon.net (Jim Reid)]

Stuart wrote,  in part:


> Yes,
> The dynamic range is set up in the front end, and these are 
> not RF A/Ds.

In the RX-340, these are the A/D on boaard 81790,  AD7872JN
and,  D/A,  same board,  AD7840JN  .

Evidedntly these part numbers are OEM's just for Ten Tec.
Nothing on the Analog Devices web site about them,  not
even a clue,  hi.  They are in circuitry of the third IF,
that is,  16 2/3 kHz.  I guess this is the frequency into/from
these conversion chips.

73,  Jim  KH7M