Band decoder / AO-Journal p51

Insulation
plastic
probably
Flashed

90° silver
rotary finger

Apparently
now too short

21-03-2016
Show tag

down

Size 16S

Plug must be femelle

Amphenol Military 7 pins size 16S
Good to know while looking for surplus : Plugs contacts blocs male and femmelle are swapables

Male

Hearley coax switch Gallery

The system is in use
since more than 6 years
and has not yet required
any maintenance operation

The control box  hold a rotary switch
allowing
automatic or manual operations

Multibands  antennas
can be managed
by using diodes  matrix

The sytem is build around
a board made by W9XT
available at Unified Microsystems.

The open collector outputs
are opticaly isolated.

The board is fully compatible
with certain Yaesu radios
incuding FT 1000-mp

The sytem is built in 2 parts
a control box
and a relays box

Band Decoder
&
Remoted
Tx Antenna Switch

The relays box is
an electrical high power
isolated interface box

box and relays are
at DIN standard

20-03-2016

Yesterday after 14 or 15 years of service this second hand part from ebay fail.

Network analyser show unstable attenuation 5 to 25 dB after each move and back.

The mouving coaxial finger reach its end of life.

A swap with a part from a spare unit in stock ( motor burned ) make it back to life.

The top cover require an heavy load to stay in
position during windy periodes.

Two pieces of wood are transfering weight of
the load on edge of the cover
to save it of punch during hot days.

The inside of the cabinet is protected
from water condensation by a top
cover enclosure

A waterproof cabinet
hold the Tx antenna switch
and
a lot of connectors
used for remote controls
and service lines

The coaxial switch is an
HERLEY model No 85506
117v - 47 to 63 cps
6 positions
with N connectors