- Clips onto 940 portable transceiver to make it a manpack transceiver - operates
with 10 metre long wire supplied or optional 3m collapsible whip (BCA94019).

Includes:

- 10 metre long wire antenna with plug.
- Cable 100mm control 8pin female to 8 pin female.
- Cable 100mm BNC to BNC.

The  Barrett 940 automatic antenna tuner is a fully featured automatic
antenna  tuner  designed  for operation between 1.6 and 30MHz at power
levels  up  to  25  Watts with either a whip or long wire antenna. The
tuner  uses  a  switched  "L"  configuration  with  256 capacitor, 256
inductor   and   Hi/Lo-Z  settings  to  provide  over  131,000  tuning
combinations.  An  input  balun  with  impedance  ratio  of  16  to  1
transforms  the whip impedance to a range that can be handled by the L
and C combinations. Tuning time is between 0.1 and 3.0 seconds with an
average  time  of 1.5 seconds. The tuner will only tune when commanded
to by the 940 transceiver with a low pulse appearing on pin 6 of the 8
pin connector.

Four  LEDs  provide  an  indication  of  SWR and status. The green LED
marked  "<1.5"  indicates  SWR of less than 1.5, the yellow LED marked
"2.0"  indicates theSWRis 1.5-2.0, the red LED marked ">3.0" indicates
the  SWR  is  greater  than  3 and that a bad match has occurred. This
happens  occasionally  with  some  combinations  of antenna length and
frequency.  The  red  LED  marked "TUNING" indicates the tuner is in a
tune cycle.

The  940  antenna  tuner  front panel provides a stud for whip antenna
mounting  via  a  gooseneck.  Next  to  this  are  binding  posts  for
connection  of an earth and a wire antenna. RF input to the tuner from
a 940 transceiver is via a BNC connector. One 8 pin panel mounted plug
provids   connection  to  the  940  transceiver  the  other  connector
providing connection to auxiliary functions and power input etc.

The  unit  is  fixed  to capstans provided on the 940 transceiver with
over-centre clips.

WARNING -Do not feed more than 25 Watts PEP two tone RF power into the
RF input connector.

Man-pack operation with 940 automatic antenna tuner