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Many owners of transceivers that
have
receive ports are choosing to use the
DXE-RTR-1A
. For these
operators it offers three benefits. First and foremost, the
DXE-RTR-1A
can protect the front end of
the transceiver with automatic disconnection of the receive input during transmit, preserving fast CW
break-in operation (QSK) with a 4 ms response time. Second, the
DXE-RTR-1A
offers a simple and
handy way to toggle between listening to receive and transmit antennas with a front panel switch.
Third, the
DXE-RTR-1A
has a built-in Level Limiter circuit to help protect your receiver from
damage due to strong received signals.
Most high-end transceivers, old and new, offer a receive antenna input that DOES NOT interrupt
RF or switch off during transmit, even though the receiver is muted, very quickly in full break-in
CW operation. This is a design feature which allows an operator to listen to a receive antenna,
located a sufficient distance away from the transmit antenna to prevent receiver front end damage,
allowing very fast QSK operations. However, most Amateurs who own this type of radio do not
have access to the real estate for the required antenna separation to support this type of operation.
Unfortunately, several hams have discovered these facts the hard way, after unintentionally blowing
the front end of their expensive transceiver with transmitted RF riding in on their receive antenna
feedline. Also, on many transceivers, connection of a receive antenna to the RX (antenna) IN port
requires removal of the “RX OUT to RX IN” jumper patch cable, and then the transmit antenna
cannot be heard. Recommendations for external relays and other devices have not addressed the
need for protection as well as switching options. The
DXE-RTR-1A
fills this need with an
attractive and versatile accessory.
For those who want to use a separate receiver or use a second transceiver as a receiver and interrupt
the receive antenna feedline when transmitting, the
DXE-RTR-1A
may be used as a T/R relay.
Also, monitoring the transmitting antenna with a second receiver while operating the main
transceiver with a receive antenna (SO2R application) is possible with the
DXE-RTR-1A
.
The
DXE-RTR-1A
may also be used with an optional
DXE-RSC-2
Two-Port Splitter/Combiner to
share a transmit antenna between two transceivers, with only one used for transmitting, or between
a transceiver and a receiver.
Standard relays and coaxial relays that are used in a typical default receive T/R system are prone to
keying timing problems which can result in damaging receiver front-ends due to pulses or hot
switching. The
DXE-RTR-1A
solves that problem for vintage radio collectors and operators. Used
as a traditional T/R relay, it switches a transmit antenna between a receiver and a transmitter with
an output of up to 200 watts. The
DXE-RTR-1A
offers complete protection and high speed (4 ms)
receive to transmit transfer. The
DXE-RTR-1A
is a superior solution to old, slow T/R relays, and it
allows the safe use of an optional receive preamplifier.
