[hpsdr] Alex fwd/ref Power Connector

Bruce Beford bruce.beford at myfairpoint.net
Fri Aug 26 22:09:10 PDT 2011


> Just received Alex filter set.  Where does the 3 wire cable from Alex >
terminate?  The cable connector does not fit the 4 pin connector on Mercury
> for fwd/ref power.

> Any help will be appreciated.
> Thanks and 73,
> Ken - W5KQ

Hi, Ken.
The FWD/REV power monitor cable supplied with Alex is not meant to connect
to Alex at all. It goes between Mercury and Penelope/PennyLane.

>From the Alex manual, page 9-10:
"The DC voltages from the RF Power Directional Couplers on the ALEX transmit
board are provided both inside the ten wire ribbon cable, as well as on the
separate four pin connector. These are also connected on the Mercury card to
the four pin Molex connector between the coax connector and the ten pin
ribbon cable connector.
The power sense jumper cable supplied by TAPR can be connected from this
connector on Mercury to the 8 Pin rectangular connector on Pennelope (sic),
between the DB-25 and the mike connector. The 8 pin end should be connected
with the black wire closest to the DB-25 connector, and the Green and Yellow
away from the edge of the board.
As an alternative to the RF Power cable supplied with the transmit board,
the forward and reverse power voltage sense wires are also available on Pin
20 (forward) and Pin 7(reverse) of the DB-25 connector."

Hope this helps clear it up. It's working pretty slick here.
Bruce, N1RX





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