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Introduction and General Information
The
DX Engineering
Receiver Guard 5000HD
is an advanced
electronic receiver RF limiter that was developed over years of
extensive research and testing. The rugged
DXE-RG-5000HD
offers performance superior to other devices on the market,
covering 0.5 to 150 MHz with under 0.15 dB of insertion loss.
(<0.15 dB at 50 MHz and <0.3 up to 150 MHz). These highly
effective and inexpensive receive RF limiters prevent front-end
damage due to high RF levels that can result in costly radio repairs.
The DX Engineering
DXE-RG-5000HD
Receiver Guard should
be used on any radio
receive only antenna input
for low-cost
front-end “insurance” in these common RF situations, among others:
Receive antennas in very close proximity to transmit antennas
Field-day operations with many transmitters in close range
Multi-transmitter contesting sites
Neighboring Amateur and CB operators
Frequent high-power mobile encounters
DX Engineering Receiver Guards provide automatic protection for receive equipment applications:
The
DXE-RG-5000HD
works for all radios and offers the ultimate performance
required
by the upper
tier of transceivers tested to have the best narrow-spaced third-order dynamic range or published RMDR
(Reciprocal Mixing Dynamic Range).
It has been confirmed with extensive testing and real world use that these inexpensive Receiver Guards offer the
best available protection for your transceiver or receiver investment. Combined with RF filters, placed on the
antenna side of the Receiver Guard, exceptional signal control and protection is possible. DX Engineering offers
the highest level of protection for your receiver’s front end.
The Receiver Guard was developed specifically to protect the crucial receiver front-ends of expensive high
performance transceivers at contesting super-station, K3LR. At this world class multi-transmitter contest station,
dedicated receive antennas are exposed to high levels of RF radiated from close-by transmit antennas.
DXE-RG-
5000HD
Receiver Guard’s multi-stage receive input protectors employed at K3LR have never failed, as none of
the expensive radios have ever required front-end repairs. And they keep on racking up great scores at K3LR,
even in the harshest of receiving environments. Why? Because, the DX Engineering Receiver Guard produces far
lower harmonic and noise products across the spectrum than any competing RX front-end saving device, allowing
competitive contest operations to continue unfettered!
At the heart of each Receiver Guard is a highly effective electronic RF limiter covering 500 kHz to 150 MHz with
an insertion loss under 0.15 dB at 50 MHz and under 0.3 dB to 150 MHz. The multi-stage design includes a gas
discharge tube for maximum pulse energy protection. The Receiver Guard is a passive electronic limiter,
not a
filter
, so competitive contesting stations must still use separate band filters. For example, the Receiver Guard HD
limiter can reject 10 watts of catastrophic receive antenna feedline RF while passing a signal of about 87 dB over
S-9, which is only 25 mw. That level is well under the point of front end damage.
When there are high levels of RF on your receive antennas, DX Engineering’s Receiver Guards generate far less
harmonic noise than other limiters on the market, which allows your station to continue to operate safely and
competitively. At normal HF signal levels Receiver Guard operates continuously with no effect on the
