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Reviews Categories | Receive Pre-amps | Advanced Receiver Research (Ar2) MSP432VDG-160 Help

Reviews Summary for Advanced Receiver Research (Ar2) MSP432VDG-160
Advanced Receiver Research (Ar2) MSP432VDG-160 Reviews: 4 Average rating: 4.5/5 MSRP: $229.95
Description: High Performance 160 Watt Mast Mounted Amateur GaAsFET Preamplifier for 420-430 MHz.

This series of preamplifiers are specifically designed for mast mounting. Locating the preamplifier close to the antenna reduces feedline losses ahead of the preamplifier lowering system noise figure. Each preamplifier is housed in a rugged, weatherproof custom aluminum enclosure. An aluminum and stainless steel clamp assembly facilitates mounting of the preamplifier to masts of 1-1/4” through 3-1/4” diameter. This clamp assembly may be removed for in station mounting. Female N coaxial fittings are provided for the input and output rf connections. DC and control functions are made through an MS military type connector. A mating connector for the control line is supplied.

Gallium-arsenide FET (GaAsFET) preamplifiers (part numbers with the suffix VDG) provide the lowest noise figures and highest immunity to overload of any preamplifier types. These preamplifiers would be well suited for very low signal level work, either terrestrial or earth-moon-earth (EME) communications, or in areas where strong signal levels are normally a problem.

This preamplifiers use rf sensing to detect the presence of transmitter power and immediately switch the preamplifier out of line. The relays used in the preamplifier will handle 160 watts of rf power. In systems where higher power amplifiers are used, the preamplifier may be installed between the driver and final power amplifier. MSP series preamplifiers may also be hard keyed with a GND to transmit command.

All preamplifiers are designed to be powered by a 10 - 16 volt dc source with a current consumption of 200 mA. Low power consumption along with the small size make these preamplifiers ideal for installation within existing equipment or systems, or for remote mounting at the antenna. Mounting the preamplifier at the antenna will provide the best system noise figure.
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W5PFG Rating: 5/5 Mar 5, 2014 17:11 Send this review to a friend
Great station upgrade!  Time owned: more than 12 months
I have been very pleased with all my ARR preamps, especially on UHF. I would recommend them to anyone looking for an affordable solution. There are more expensive preamps, but ARR fits the bill very well and at a price I could fit in the shack budget. I predominantly use mine for satellite work.
WA4SCA Rating: 3/5 Dec 21, 2008 15:52 Send this review to a friend
Leaks  Time owned: more than 12 months
I purchased one last year, and found that as a preamp it worked well. It did introduce a modest but easily detectable SWR "bump" when transmitting. More importantly, I ordered the version with a choke to allow for feeding the DC power up the coax for future use. Much to my amazement I found that it lacked steering diodes, so that if you applied power via an external power cable, the DC power was also applied to the coax. Only by chance did I catch this before damage was done.

The final straw came this week when after several days of heavy rain, the unit went deaf, and the SWR bump jumped to 8:1. After taking it down, I opened it up and a couple of teaspoons of water ran out! While the unit seemed tight, it in fact allows water to enter through the 4 screws which secure the cover. Fortunately, the internal "catch basin" only covered the input, output, and DC power connector with water, leaving the actual circuitry and particularly the relays high and dry. After cleaning and drying, it is back to full operation, and with additional waterproofing is now my backup unit.

I have switched to a unit from another source, matching my 2 meter unit. It has steering diodes, no detectable SWR "bump," and a truly waterproof housing, plus adjustable gain. With caution the ARR unit will give years of service, but it is definitely lacking in the "fit and finish" category.
WD4ELG Rating: 5/5 Dec 21, 2008 14:42 Send this review to a friend
Holy smokes!  Time owned: 0 to 3 months
I wanted to get better LEO sat reception with my indoor attic antennas (Elk, Arrow). I tried Mirage in-shack for 2M and 440, but returned them...maybe because I needed mast mount design.

Anyway, did some research and got some outstanding pre-sales support from Ar2. Decided to buy the 440 MHz unit and see how it performed.

Installation was simple in my attic. Once I discovered that my 12V supply was not working and I swapped it out, this little baby fired up nicely. WOW what a difference. I was hearing signals S7 on AO51 (YV5AFE) at 3 degrees elevation that I could not hear without the preamp! Suddenly I realized that I could hear signals that would be challenging to work with my 5 watts! Up until now, I could work what I could hear, but I could not hear very much.

And I was hearing CW beacons like CO55/CUTE-1 that I COULD NOT HEAR without the preamp.

The thing is built like a tank. I am ordering the 144 MHz version on Monday. AWESOME!
KS1I Rating: 5/5 Sep 15, 2006 12:32 Send this review to a friend
Great preamplifier.  Time owned: 0 to 3 months
This preamplifier is nothing short than great! I use it for weak signal satellite communications and this thing operates flawlessly. Since it is used in conjunction with my IC-910H, I ordered mine with the optional “choke” due to the fact that I am feeding the dc power via the output coaxial cable. Build solidly, arrived super protected in perfect condition. I am so pleased with the MSP432VDG-160, that I may be purchasing the MSP144VDG-160 for 2 meters. Joe – KS1I

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