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Field Marshall Tracking Receiver (UHF)





The Field Marshall has 1000 or 5000 channels, and can track any specific frequency within several bands.

The Field Marshall offers very high sensitivity, loud sound (with speakers top and bottom), a solid ultra-compact case design featuring a "Quick-Release" handle, improved LED front lighting of the control panel for night tracking, and the latest generation of Marshall's exclusive collapsible yagi antenna now with cable-free operation.

Also, exclusive to Marshall receivers is the addition of polyphase filters, our new noise floor reduction technology that reduces the background noise while increasing the effective range and tracking ease.

FM UHF 1000: Available frequencies: 432, 433, 434, 435, 436 
FM UHF 5000: Available frequencies: 5-band 432-436MHz 


Getting the best range requires having the most "useful sensitivity" in a receiver. The combination of receiver, the matching cable and the antenna designed for specifically for it consitute a complete package that must work in harmony to achieve the most sensitivity possible. The Digital Field Marshall will give the most range, especially in cities or areas of "unwanted radio noise."

Since this receiver doesn't rely on crystals to determine the frequencies it can cover, we've given it more capacity. An all-digital circuit allows the same receiver to pick up any frequency in the 216 through 219 MHz bands allowing every frequency you could possibly want or just the ones you're interested in.

Best of all, if you change your mind down the road, your same receiver can easily be converted to a different band thus protecting your investment.

A broadened, smoothed tuning mechanism means that tuning into the signal is a pleasure and much faster than before.

Tuning with the new tune knob is broad and is protected from accidental contact so it's not easily bumped off your tune setting when getting in and out of the vehicle.

Higher Sensitivity: With the new digital receiver board inside the Field Marshall, we've improved sensitivity by another 3dB, equal to that of the Stealth, currently the best in the market. This means a significant increase in reception distance for the same transmitter.

The actual sound of the receiver has been improved through the elimination of harsh harmonics and distortion, making it easier to track weak signals and far more pleasant to listen to.

Three red LEDs now illuminate the entire control panel for better clarity in the dark without compromising your night vision.

As great as it is to have a handle on long walks or when holding the receiver out the window, there's times when it's better without it. Greater portability and reduced size is achieved without the handle on a third axis.

So, how to have it both ways?

Answer: The new Quick-release handle. Now, you can choose when to use it and when to put it away in another pocket. Even though it's tight and secure with its bracket mount, it takes only seconds to remove it using the thumb wheel screw-on design.

Those who've now used it, love it.

Not only can the handle be quickly removed, it also attaches directly to the antenna. This gives you three different ways to configure your receiver.

So, now you can have it any way you'd like: use everything together in one single piece, hold the smooth and smaller case in your hand without the handle, or wear the box safely around your neck and connect the handle directly to the antenna to hold outside the window in the rain.

Hold the receiver down waist high and you have two speakers facing up at you. Hold it up high for better reception and you still have a speaker facing down at you. By incorporating three speakers, the sound on the 2007 Field Marshall has been increased in volume.

And yet it's also quiet where it needs to be: A new narrow-band filtering system is employed rejects noise better without reducing your signal, so you hear the signal more clearly with less distracting background noise, even for the weakest signals.

More importantly, it has improved the sound's omni-directionality which means the volume doesn't change as you rotate the receiver, a definite problem in other receivers that leads to erroneous perception of the signal strength in certain directions.

Nearby transmitters on other channels sometimes cause interference to your reception, but this receiver has special circuits to minimize the effect.

The improved rejection of noise near power lines means you can hear weak signals better and increase your range.

Better Range Estimation: The range settings (Medium and Near) have been adjusted so that you know it's time to start walking. You can therefore switch between these in most situations to get a better idea of how far from you the bird or dog really is.

Electronics are housed in a robust case machined from a solid block of aircraft aluminum.

Purposely made for heavy use outdoors, this tracking receiver is designed to give you more years of trouble free operation through the widest range of temperatures, travel and weather than any other. Sealed connectors, mylar speakers, overlapping seams all make this receiver the most durable design now on the market.

In addition to all the performance improvements made to the FM1000, Marshall Radio engineers redesigned and shrunk receiver board to about 20% less total area, with everything fitting inside the case much more efficiently leaving and no wasted space. We then asked our external design team to "vacuum pack" the case down to the absolute minimum required, with no wasted airspace on the inside, no needless bulk on the outside. The result is a smaller overall receiver.

With the handle removed, the slimmed down design fits even better in your hand. Designing the outer case to be hand-held required we make additional changes, like a larger radius on all corners, and counter-sinking the earphone and power jacks to make them flush with the surface of the case, all of which just makes it feel more like an over-sized iPod in your hand.

Turns out the case is much more stout and rugged than even the previous generation Marshall receivers.

It's also designed to use six AAA batteries, cheaper to replace, and easier to change.

We kept the same, field proven, collapsible, three-element directional antenna design for maximum directionality. It's a full gain yagi when deployed, but now it collapses to an even smaller size. We reduced the size of the brackets, the sliding booms and eliminated the need for cables, cable savers and big springs found on the previous design. Also rugged solid rods are now used for the elements instead of hollow tubes.

Improving the shielding on the case also means an improvement in how the antenna works for you. It's simple now to track up to within inches of a transmitter lost in the grass with the same pin-point directionality you get at a distance. The full-size three element yagi gives the best range and directionality of any antenna, and reduces the "back lobe" which sometimes fools people into tracking 180 degrees backward, in the wrong direction.

Using newest generation electronic components and creative packaging allows us to fit a lot into a small space.

And, our committment to using aluminum alloys which have the maximum strength to weight ratios makes this receiver as light and strong as technically possible.

A key mechanical design breakthrough of all Marshall receivers is the collapsible yagi antenna. The full-sized three element antenna (shown above right) can be reduced in size by half when fully closed.

When collapsed down into its stowaway position, and put into its hoslter (included with every new receiver), the new Field Marshall makes a small and compact piece of equipment to take with you into the field.

Q & A

Why did Marshall stop selling the TRX 3 and 16 receivers?
For several years, Marshall Radio was an authorized "reseller" of the receivers manufactured here in the U.S. by Wildlife Materials, Inc. (WMI). And for a number of years, they were a good solution for our customers when combined with our transmitters.

But, whereas most resellers were happy to just resend the WMI receivers back out to their customers as they came, still mounted to the traditional long and cumbersome yagi (with wing nuts!) and simply collect their margin on them, we saw great potential in these TRX 3, 16 and 48 channel units, the smallest of their receivers, to be repackaged into a neat little one-piece design for falconers. So we took them a step further by adding three additional features to improve their functionality:

  1. Our unique and Patent-Pending collapsible yagi antenna was mounted to the battery cover on top, which required its being replaced with one made of steel and having new holes drilled for the thumbscrews, in place of the slots as they come from WMI.
  2. We added a pistol grip to the bottom with a click-on trigger switch and the necessary electrical wiring up to the receiver board to turn the receiver on and off independent of the switch on front, to extend battery life in the field.
  3. We added a new outside housing of bent sheet metal that was powder-coated black in the exact same manner as the ones from WMI, but with a one-inch cowling that protected the controls and switches on front ( WMI has since changed their case to be identical to ours and incorporate the protective cowling as well, after seeing our modified versions coming back to them for repair).

However, when customers had need for repairs, we could not work on them here in house, but had to ship them back to WMI like every other reseller, and this caused delays. We also learned that the 5-year warranty that sounded so good to us at first had huge disclaimers that made most repairs for our customers non-warranty, such as excluding 'moisture' or even 'humidity!' So, for a receiver that's used outside all the time, this became a big problem as well.

And, since these were old circuit designs that had been developed many years prior, we also suggested other improvements to WMI that might be done internally, including the improvement of sensitivity, better shielding of unwanted noise and lighting the entire control panel for nighttime use. When it became clear after repeated turn-downs that WMI was focused primarily on the Hound market and not going to make any significant improvements that would help our Falconry customers, we launched the development of the Field Marshall receiver in-house, which would then be our own design, and over which we would have full control to improve and make needed changes we saw as necessary.

The Field Marshall now takes the place of the TRX models in our product line and is just a great improvement in many key ways. We still support as best we can those customers who purchased TRX receivers from us years ago, although regardless of the reason, it always seems to be $100 to $150 charge each time for WMI to work on them.

What are the differences between the TRX receivers and the Field Marshall?

In a word: Features. . .
And Directionality, and Sensitivity, and Reliability, and Ruggedness. (I guess that's more than one word).

Advantages of the Field Marshall Receiver:

  • Marshall's receivers utilize SMT (Surface Mount Technology), the latest and best manufacturing process in electronics assembly technology. Originally developed for extreme military applications, all Marshall receiver boards are built using this method. The key advantages include: Enhanced reliability due to the fact that parts are machine placed and soldering is done in an IR (Infra-Red) oven (no chance of an operator overheating the part while soldering by hand), Smaller size of components = less mass of for each part i.e. lighter weight and less damage caused by physical shock (receiver being dropped). If you open up a TRX receiver, it will remind you of a 1960's transistor radio with its through hole circuit board and hand placed parts. Look inside the Field Marshall and it's like a cell phone or computer board.
  • Machined Aluminum Case: Much stronger and more robust that the stamped bodies of the TRX3/16. Also, the Field Marshall utilizes overlapping seams where the two case halves come together (no gaps in the side of the case) to virtually eliminate stray RF (Radio Frequency) noise from entering the receiver, as well as maintain extreme directionality when searching for a powerful transmitter up close. The signal does not "leak" through the seams and other unprotected parts of the receiver body. This also allows the Field Marshall to be one of the most water resistant receivers on the market, with it's Mylar speaker, for outside use.
  • Better Audio: our precision sound chamber produces more audio, and it faces backward towards the operator, not up at a 90-degree angle, away from the operator as on the TRX3's and 16's.
  • 3-Position Range Switch showing Near, Medium or Far, instead of simply 'On' or 'Off': You can know even more precisely where your lost bird is. No gaps in directional coverage, from miles away, down to the last few feet of the search. The Field Marshall remains deadly accurate.
  • Lighted Control Panel - All controls on the front panel are lit up with a red night light (not just the meter) for night tracking. We used red, which does not hinder your night vision when you look away.
  • Easier battery changes, and elimination of broken battery wires, a common problem we experienced with the TRX's.
  • Filter Switch for quieter reception.
  • Better Channel Selection. The Field Marshall is much less vulnerable to other RF sources, i.e. a dog collar that is running right next to you.
  • Much better sensitivity, our Field Marshall has 5db more sensitivity than a a TRX3/16. 6 db which translates into twice the range when looking for a weak signal (always make sure your antenna cable is secure and tightly plugged in). For the Stealth, all the same advantages plus, even more sensitive, Auto Tune Memory, and the ability to track 100 channels in up to 4 bands.

And finally, they are just so much cooler in appearance. Why would I want a Field Marshall and not a Stealth?
For the majority of falconers, the Field Marshall is the ideal answer since it is competitively priced and can be ordered with 10 channels to cover the very same range of their friends' old RB4 or MN10, for example, who they may need to help on a search. Yet this receiver will regularly outperform other receivers (see Brad Townsend under 'customers say'). Most falconers would use 2 transmitters per bird, one tracking collar on the dog, and possibly now a Homing Beacon back in the vehicle. So having ten, and now up to fifteen channels is more than adequate.

We have a problem in our area in that people think you're carrying a gun. Can I order my Field Marshall without the pistol grip?
Certainly. We have several customers who have requested their receiver to be shipped without the handle and they simply hold it by the case (see Doug Pineo under 'customers say'). With the on/off switch on the panel, this is not a problem.

Customers Say

alberto"The new Field Marshall is a remarkable receiver with features that translate into tangible advantages in the field. It is so well shielded and filtered that, not only is range vastly improved, but localizing a signal is so fast you can literally run right to it. This difference is not lost on those of us that have arrived moments before a stalking coyote or eagle!

"In recent years, I have flown well-hacked gyrfalcons that share a rather cosmopolitan view of the sky. This past season, a talented young female, “Sonde” took it upon herself to ring long-billed curlews up to the space station. Fortuitously, I had the new Field Marshall to find her quickly when she drifted back to earth miles downwind.

"Having used or tested most other receivers, even in places as sketchy as the tropics, I think there is nothing that touches this one. The beautiful little unit is also rugged, so it is a no-brainer to always have it along. It is simply an awesome unit."
- Alberto Palleroni

steve"I began using the new FM 1000 in September of 2007 at first I had a little trouble adjusting to the different settings being so familiar to using the Stealth. After giving it a little time I became familiar with the new FM 1000 and found it a very sensitive and much improved receiver. I hawk Sage Grouse and unfortunately some flights result in long tail chases that sometimes end with a kill. Finding your bird quickly is important to protect it from predators. The new FM 1000 is very directional and has a much cleaner signal, filtering out most disturbances. It has three settings far, medium and near. I have found that I only use two of these setting the far and the medium. As far as I can tell the near setting would be useful for locating a lost transmitter that may have fallen off the bird. I have a secure method of attaching transmitters so I never need this setting. When the bird is on the ground over 300 yards away you will not get a reading with the medium setting this tells you your bird is down so I switch to the far it is very directional leading me to the kill. ( I use the medium setting when getting close) If the bird has missed and is still flying I will get a signal on medium, which tells me to stand my ground and wait for the bird to return. I am fortunate to have very nice flying birds although my eyesight is not as good as it used to be and finding my bird when it at a nice pitch is becoming more difficult.

"The new FM 100 is a dream, better than bells for locating a falcon in the sky. I use the medium setting and the unit is so directional that I can point it skyward and it will tell me where my bird is and then I can spot it. In the past when a falcon was high and over head you would be drowned out with a signal but the FM 100 is so directional that it will point right at the waiting on falcon using the medium setting. If you are hunting and are watching the dog it is hard to keep an eye on the falcon waiting on high above when doing this I have my FM 1000 folded up in my vest pocket with the unit on, as long as I can hear the signal I know my bird is above. If the signal gets weaker I know the bird is out of position. When this happens I stop and pull out the receiver and flip to the medium setting, which tells me exactly the position of the waiting on falcon.

"I have a hard time giving up old equipment that has worked well for me in the past I used a Marshall Stealth with another Stealth for a back up. Now after a season with the new FM 1000 I intend to find homes for my old receivers and get another FM 1000 for my back up receiver. When you hawk in wild places you know the importance of extra tires, shovels, batteries, water and a back up for anything you want to keep! (your life, bird etc.)!"
- Steve Chindgren, UT

daver"I was thinking about writing you to say how much I love my new receiver! The FM 1000 really is an amazing piece of technology and a real quality unit...You should be charging more!

"There are a number of features I like such as the smaller size, quick release handle and improved antenna. But, what I really like is that it's just easier to track a bird. The combination of a very directional unit plus almost no background noise makes this by far the best system I have used and I find that I can track a bird much faster than before. I am happy to say that I haven't had to track my new hybrid much this season but I use it to find him quickly on a duck in the bushes which is important because the red-tails seemed to be more aggressive than ever before. I have also used it to track the birds of my friends and we used it in Wyoming when I was at Steve's in the fall.

"I am very glad I changed my two transmitter frequencies so they each have the same last three numbers. I just switch from 216 to 218 without having to punch in the numbers each time. Thanks very much for helping me with that when Marci and I came by for a visit!"
- Dave Rimlinger, CA

tonyjames"We all know that to get the full benefit of our telemetry system we need to thoroughly test it, to become well acquainted with it, so that we understand the full meaning of that reassuring bleep. And yet, if I'm honest, I've never really done so.

"Whenever I've needed telemetry, which thankfully hasn't been too often, it's generally worked well enough to find a missing hawk --- although the reunion would have been swifter and more certain had I taken the time to practice my tracking skills, and had I possessed the new Marshall FM4000 receiver.

"In November 2007 I had the misfortune to lose my falcon to a tragic accident when out hawking. Nothing could have influenced what happened that day, but because I tend to fly just one falcon, the loss was devastating. My season was over, but I needed to look to the future.

"The need for good telemetry is at its most obvious for the falconer who puts all his eggs in one basket, and having found myself without a hawk, I resolved to develop some level of competence with telemetry in preparation for the new season.

"A month after that loss, I had the pleasure of getting to know Robert Bagley during the week of the IAF/ANFA AGM in Sezanne, France. Of course we discussed telemetry experiences, both good and bad, and I learned a lot about the development and evolution of Marshall telemetry equipment. Robert's obvious pride at Marshall's development of the most advanced and reliable telemetry system available convinced me that I should invest in some of Marshall's latest equipment. As it transpired, the investment turned out to be much less than expected, as for the price of a handful of raffle tickets I became the proud owner of the FM4000 receiver and a PowerMax transmitter, donated at that meeting by Marshall Radio. Oh the irony --- the best telemetry in the world, and no falcon!

"Still, determined to look for the positive, I set about comparing my new prize with the setup that had served me well enough over the preceding years. No doubt unfairly, I set about the comparative tests in the naive belief that my existing equipment fulfilled my requirements admirably, and could not be bettered. I expected there to be little discernible difference between the two outfits.

"But, quite simply, there was no comparison. The new Marshall equipment outperformed my old set in every department. In signal detection, both in range and clarity, in directionality, and functionality. The design and build quality are testament to a commitment to improve, in an age when the global trend is to 'dumb down.' I don't imagine the word 'compromise' figured in its development.

"Next season, as I again go through the process of making a game hawk, I hope not to call on my telemetry to save the day --- but if I need to, I'm now more confident than ever that I have the best equipment available to ensure a safe return."
- Tony James, UK

"I wanted to email you to let you know that I am very happy with my FM 4000. I have been playing "hide and seek" with Powermax transmitters and my new receiver, and I find it to be very directional and quiet. I will send in some of my transmitters this summer to have their frequencies changed so that I can have, for example, 216.005 and 219.005 on my gyrkin, 216.085 and 219.085 on my hybrid, etc. This would enable me to recruit friends to help find a lost bird, if needed. The overall quality of the unit seems improved (although I really had no complaints before) and the smaller size is nice too."
- Tim Sullivan DVM, MO
Tim in a Veterinarian who lived in the UAE for several years working at the Falcon Hospital in Abu Dhabi. He now lives in Missouri and is an active falconer there.

michaelgarcia"I have been using the Field Marshall 4000 this season. During the last four months I have been on the road through sixteen states covering over fifteen thousand miles attending meets and hunting all over the western United States. I have to say that the FM 4000 helped me out on more than one occasion when looking for that very, very weak signal.

"With the new polyphase filters I was able to push up the volume and still keep the background noise down (static). This allowed me to pick up a beep when other units were only able to receive static.

"The new Field Marshall 4000 is just one of the many reasons I think Marshall Radio is number one."
- Michael Garcia


steves"I am quite happy with the new Field Marshall. My old Field Marshall is still in great condition but it now collects dust as my trusty emergency spare.

"The new FM's improved directional sensitivity is a real asset. Much of my daily tracking is at close range. My old hybrid likes to lay down and hide on hun kills, and with just a little ground cover it becomes a pure telemetry game to find him at times...and to avoid stepping on him. I've spent some time practicing with transmitters dropped in snow or grass, and it's real handy to be able to hold the unit (with the antenna closed) by the machined handle's lower loop, and simply skim it (upside down) a few inches above the ground. The receiver seems to be very sensitive to proximity when used in this way, and errant transmitters that find themselves off of the bird are quickly found. (I'll tell you the story of crawling around in the dark in skunk sprayed stubble looking for my micro another time.)

"I am very pleased with the new FM's ability to filter out interfering noise. My old receiver, by contrast, was quite "noisy" when switched to "far", and I regularly had troubles tracking birds while standing close to powerlines. No such problems with the new unit, and not just a minor improvement, but a great one.

"The housing and new antenna are a great package, and the removable handle is nice, but I don't find it necessary. I realize I speak only for myself on this one and I suspect some day I'll realize this advantage as others have. Perhaps pistol-grips are better received up here in Canada. The battery housing is also nicely improved.

"I rarely change channels, as both of my falcon transmitters are on 216.035. I don't understand why more don't use this method. My dog collar is on 219.035, and the switch from bird to dog (with no overlap from one to the other) is infinitely simple.

"You guys have done a great job on this new unit."
- Steve Schwartze

dougp"I've consistently used the new Field Marshall receiver this past season as my primary receiver. It's a significant refinement from the original, which was a breakthrough receiver/antenna combination in its own right.

"Even without considering the improvements in gain and noise reduction, the new Field Marshall is a big improvement over the original in three ways:

  1. You finally took my advice and made the pistol grip a modular element attached with a beautifully machined bayonet fitting. Excellent execution of this concept, beautifully machined;
  2. The new receiver housing is significantly more compact than the original, and therefore easier to hold;
  3. The new folding antenna retains all of the positive, instant deployment of the original, but is much simpler and more robust, as well as being narrower in folded mode and therefore more compact. The machining on this antenna, and the mechanical design with the helical springs is just beautiful. Very elegant design. Excellent!

"I've had quite a few opportunities to recommend the new Field Marshall receiver to a number of customers and friends, without reservation. Its stout design and construction, compact size, and sensitive gain make it the compelling choice. I suspect new technology will soon displace current dominant RF technology in falconry and sporting dog telemetry. Until this happens, the new Field Marshall will be the last word and only choice for falconry or hunting with sporting dogs."
- Doug Pineo

stanislav"I have been using the Marshall receivers 8th years now. Started with Dave Jamieson's Stealth in Nevada deserts. Then after three seasons went back to Czech Republic and start use it here in small hillside with many small villages and towns around. So I had to learn new tracking tactics.
I and mine few freinds tested four different receivers from europe and US and one made here in CZ. The Marshall was on top.

"Now I sold mine two years old FM-10 receiver and and start use the FM4000 firs season. In the start it was hard as I was knowing the old receivers sensitivity well. After few chases the receiver start be mine new friend.

"Has very good sensitivity, is more directional, small to carry in mine hawking vest, has nice professional dezine. And it is not like a toy receiver that does not get good direction when you need it because it points to the falcon like no other receiver I have ever tried, straight to the falcon with no mistake.

"I think it is the best in all the world, not just the Czech Republic."
- Stanislav Menclik

richsharpe"When describing and answering questions about falconry, I have, more than once, said that I would have given up on the endeavor if it wasn’t for radio telemetry. Fortunately, I was able to put a transmitter on the first long wing that I flew in 1979. That eyass female merlin would have been lost in her first season if it wasn’t for a leg mounted unit.

"Today, more than ever, I rely on this equipment to pursue my favorite style of falconry. When flying solo, without the aid of another pair of eyes, I often need to locate a high flying, wide ranging falcon or to make fast tracks behind a tail-chasing grouse hawk.

"Thinking back to earlier models of telemetry receivers, I am so glad that there have been a handful of people with the inspiration to push innovation forward to give us the choices that we have today.

"This last season I had the pleasure of using the new Marshall FM 4000. Some things do get better with time! This new version of the Field Marshall receiver has some developments worth noting. The biggest overall improvement is the use of a polyphase filter to lower the background noise level to improve signal recognition. For those times that you are up on a high point frantically sweeping the horizon, you can count on this receiver to locate that distant beep.
Smooth and sturdy are the first words that come to mind when describing its updated physical characteristics. The antenna with its new helical springs deploys with a quick and concise motion. Another neat change is the addition of two keepers to seat the last elements folded, making a unit that only deploys when intentionally engaged.

"There is also improvements you can really put your hands on. With its slightly smaller size and rounded edges, user comfort has been enhanced! And last but not least, the removable handle offers the option to comfortably palm this extraordinary unit.

"More than once I was able to put it to the test at the end of the ’08 hawking season. Often, my late blooming immature Gyr/Perg. Tiercel would mount wide and disappear from site as I moved in for a flush. With this unit’s super directionality and sensitivity, it was possible to quickly relocate my bird and seize the moment."
- Rick Sharpe

Configure Your Product
Frequency Band if you need a specific channel, please specify during checkout Model
Price with discount $1,295.00
Sales price $1,295.00
Sales price without tax $1,295.00