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The RAS-8x2 is a highly flexible receive
antenna switching system. With this unit, you
can select among Beverages, K9AY Loops,
Pennants, Flags or other RX antennas with
complete flexibility. The RAS-8x2 is ideal for
SO2R and most M/S and M/2 stations. It's
also perfect for dual-receive on a single
band.
Features and Specifications:
System components:
• Master antenna switching unit, in a 2-1/2"
x 15" x 8" (H x W x D) aluminum case
• Two (2) pushbutton antenna selector
consoles; each one is 1.5" x 2.75" x 5-1/4"
(H x W x D) in a rugged extruded aluminum
case
Connection between the antenna selector
keypads and the main switching unit is with
easy-to-find DB-25 cables (not supplied).
It's not a digital interface, just a convenient
way to take advantage of inexpensive
standard computer cables.
Switch operation:
• Up to eight antennas can be routed to two
separate outputs — any antenna to either
output with no interaction.
• Simple pushbutton antenna selection —
instant antenna change.
• Independent control of each radio's
external antenna input.
• If you have fewer than 8 receive antennas
and your radio has an 'Antenna Out' jack,
simply connect it to an unused input — the
selector console will then control the
MAIN/AUX antenna switching, as well.
• Two or more antennas can be selected in
parallel for each radio (if spacing and
phasing of feedlines allow them to operate in
parallel).
• 13 dB preamplifier/filter — two preamps
per unit; one for each radio output —
switched on and off at the remote keypad.
Isolation:
• When the same antenna is selected for
both outputs, isolation between the two
output ports is optimized for 40 dB or more
on 160 and 80 meters. Isolation is at least 20
dB over the entire HF range through 10M.
• On/Off isolation is typically 60 dB or
better from 160 through 40M.
Additional Specifications and Notes:
• Insertion loss: 3 dB signal split + 0.25 dB
typ.
• Level change when both receivers select
the same antenna: 0.25 dB max.
• VSWR at antenna inputs: Approaches 1:1
for unselected antenna ports; typically 1.3:1
or better for selected antennas, but may vary,
depending on the accuracy of your receiver
input impedance.
• DC Power: +12V @ approx. 500 mA max.,
(provided by user — be sure power source is
fused at 1/2 amp.)
• Requires (2) DB-25 cables of the length
you need (provided by user — be sure to get
a cable with all 25 conductors. Some cables
with DB-25 connectors are for serial data
and do not have all 25 conductors.)
• This unit is is not weatherproof and is
intended for installation indoors or in a
protected area.
Purchased from Array Solutions and never
actually put into service. Condition like new.
Will sell for $399.00 plus shipping &
insurance. PayPal or personal check OK. Ship
UPS or you pick it up in Nashville TN area.
73,
Bill AA4XT (ex-NT1Y)
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