Radar DFR7 Fail, Constant Owned by Park Ranger with 35.5

ARkaband

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Have any pics from the front looking through the glass?
Can’t really get a good look of it in the dark.
With no flash, you can’t see. With flash, it just reflects off the windshield. I’ll try to take some better ones tomorrow in the light.
 

GTO_04

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That could have been C/O but with the way the alert strength was changing it is hard to tell. IME, the LRD/DFR are very poor on 35.5 Ka. You will be better off with an R7 or R3/R1.

GTO_04
 

Godowsky17

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Have any pics from the front looking through the glass?
How much is a couple degrees difference in mounting angle really going to affect performance? (Not a rhetorical question, I actually have wondered about this.) Vortex tested it and found a substantial difference in detection range, but he was mounting his detector at some ridiculous angle like 45 degrees.
 

Tallyho

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How much is a couple degrees difference in mounting angle really going to affect performance? (Not a rhetorical question, I actually have wondered about this.) Vortex tested it and found a substantial difference in detection range, but he was mounting his detector at some ridiculous angle like 45 degrees.
Just depends on the circumstances. If that's all it is then likely not going to matter as much here but could change the outcome more significantly for I/O or other circumstances where sensitivity matters.
 

fishing66

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Looks like IO to me.
 

Brainstorm69

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LRD950/DFR7 can be average to poor on detecting 35.5 depending on your detector and the fw you are running. See this old (but relevant here) TXCTG compilation of results from various testing events (TXCTG – Compilation/Averaging of Testing Results Feb 2016 to Nov 2016). Off-axis around a curve, lots of vegetation (35.5 is particularly affected by vegetation in my testing experience). It's possible it was C/O.
 

NorEaster18

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He’s got a damn quick finger then, because on the very first alert you can’t even see him from the dashcam.
This is what I noticed as well. It wasn't quite LOS when the first alert happens. That's usually the indicator that it's C/O.

It's always weird when you live in a world where it's exclusively C/O. It's hard to explain. Yeah, I/O can help explain some incredibly poor circumstances. And we may never know. But it just feels uncertain when 100% of the encounters with the exact same town/unit/LEO have always been C/O, what made them choose I/O this time if that's what it was?
 

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Dave G

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Sure seems to have been I/O or he just turn his equipment on. Should have a better detection distance even with that terrain... JMO. @Vortex's 35.5 test results for the DFR7 even shows it beating out some of THE BIG DOG detectors. Quite a few other scenarios could have played out. He could of had it on his rear antenna and then switched it to the front facing. Let's face it,! Sometimes ya never figure it out. Good thing you were at or close to the PSL.

Screenshot_2019-09-08-10-23-07-1.png
 

knight_man

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I get detections like this with all my units (even the big boys).

Some of the conditions that would excuse this event in my fragile little mind:
Terrain, vegetation, 35.5, you were the only thing on the road except for him, and he was in a straight looking right at you pop out around the turn. He had plenty of time to release the hold. and maybe I am not seeing clearly, but he was barely moving until you came around the bend. He was looking for action.

As you said, lucky you were doing PSL. I would have been double on a beautiful road like that. All those turns and no pot holes. Woof.
 

DrHow

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My vote: C/O.

Device not good enough to gather and report quickly tiny shreds of RF that could have come off the small road signs. Or possible the power lines if the LEO was running straight down road at that time. Total guess on my part.

However, with more than 40 years of RD use, looking at the video slowly, as soon as the radar hits the off axis angle the horn can deal with, it alerts. Off axis performance is the key here.

Staying in Uniden brand, the R3 and R7 continue to have reports and tests of excellent off axis detection. You might have gained a few seconds with that capability.

Also, the R3 and R7 have excellent reputation for gathering tiny slivers of RF bouncing off anything that has minimal reflectivity. Or pick up the most suppressed signals through foliage. Even on 35.5.

I have a question.... Does your device ever have a constant tone at detection range, or does it always beep? The cadence was strange. Like it was having issues picking it up full strength so close. As you got closer the cadence declined slightly as your off axis angle increased as you got close. Once past it froze cadence and then went off as it should. Not sure how well your unit does on 35.5 at anything but the smallest angles to head on.

As mentioned above, your off axis angle to his radar as you came around the corner would have bought you a couple of seconds to correct. Off axis works in Target favor most the time. He would have had you shown at reduced speed until angle leveled off.
 

ARkaband

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I get detections like this with all my units (even the big boys).

Some of the conditions that would excuse this event in my fragile little mind:
Terrain, vegetation, 35.5, you were the only thing on the road except for him, and he was in a straight looking right at you pop out around the turn. He had plenty of time to release the hold. and maybe I am not seeing clearly, but he was barely moving until you came around the bend. He was looking for action.

As you said, lucky you were doing PSL. I would have been double on a beautiful road like that. All those turns and no pot holes. Woof.
Yeah man for sure. When I first picked up my Si, I used to fly down that road (2ish years ago). I’ve had several friends get stopped back there, and now pretty much everytime I go through there I get a C/O 35.5 hit. Since then, I keep it under 42 unless I have a rare rabbit.
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My vote: C/O.

Device not good enough to gather and report quickly tiny shreds of RF that could have come off the small road signs. Or possible the power lines if the LEO was running straight down road at that time. Total guess on my part.

However, with more than 40 years of RD use, looking at the video slowly, as soon as the radar hits the off axis angle the horn can deal with, it alerts. Off axis performance is the key here.

Staying in Uniden brand, the R3 and R7 continue to have reports and tests of excellent off axis detection. You might have gained a few seconds with that capability.

Also, the R3 and R7 have excellent reputation for gathering tiny slivers of RF bouncing off anything that has minimal reflectivity. Or pick up the most suppressed signals through foliage. Even on 35.5.

I have a question.... Does your device ever have a constant tone at detection range, or does it always beep? The cadence was strange. Like it was having issues picking it up full strength so close. As you got closer the cadence declined slightly as your off axis angle increased as you got close. Once past it froze cadence and then went off as it should. Not sure how well your unit does on 35.5 at anything but the smallest angles to head on.

As mentioned above, your off axis angle to his radar as you came around the corner would have bought you a couple of seconds to correct. Off axis works in Target favor most the time. He would have had you shown at reduced speed until angle leveled off.
The DFR7 has had very odd ramp up ever since I’ve had it, and other users report the same thing. Here’s some other encounters:
 
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NorEaster18

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My vote: C/O.

Device not good enough to gather and report quickly tiny shreds of RF that could have come off the small road signs. Or possible the power lines if the LEO was running straight down road at that time. Total guess on my part.

However, with more than 40 years of RD use, looking at the video slowly, as soon as the radar hits the off axis angle the horn can deal with, it alerts. Off axis performance is the key here.

Staying in Uniden brand, the R3 and R7 continue to have reports and tests of excellent off axis detection. You might have gained a few seconds with that capability.

Also, the R3 and R7 have excellent reputation for gathering tiny slivers of RF bouncing off anything that has minimal reflectivity. Or pick up the most suppressed signals through foliage. Even on 35.5.

I have a question.... Does your device ever have a constant tone at detection range, or does it always beep? The cadence was strange. Like it was having issues picking it up full strength so close. As you got closer the cadence declined slightly as your off axis angle increased as you got close. Once past it froze cadence and then went off as it should. Not sure how well your unit does on 35.5 at anything but the smallest angles to head on.

As mentioned above, your off axis angle to his radar as you came around the corner would have bought you a couple of seconds to correct. Off axis works in Target favor most the time. He would have had you shown at reduced speed until angle leveled off.
@DrHow that ramp up is par for the course with the DFR6 and DFR7. At full strength, the audio alert stutters, almost as if it was slower than 4 on the alert meter.
 

nighthawk

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I would likely go with as he closed in on the corner he flipped the radar on. I think more of a sniff would have been gotten if he was running it always on. That was a line of sight detection.
 

venom690

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A cop would not had fliped it on until the car was heading straight at him unless he was a complete rookie, that looked like a legit C/O
 

dchemist

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We need to track down this Ranger vehicle and verify which unit he's running.
I'll talk to my dad and see if he can gather any information the next time my parents are park hosting.
 

westwind77

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Going through the video a couple times both of you had a clean and clear view of each other for a second before the RD alerted. I have had some really tough 35.5 encounters given I am in similar terrain but I have always had more warning than that with current and past RD's. If this was a 'question of the day' my answer would be I/O.
 

InsipidMonkey

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LeftLaneInPA

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The other thing we haven't considered is that it may have been the deadly new Decatur G3 35.5 unit (EDIT: although it's not advertised on their website yet...so maybe not). That thing has only 1.4 milliwatts of output - which is < 10% power output compared to the Decatur Genesis II I've got
Huh, okay. That may explain why I didn't pick up a Park Ranger in a new vehicle blasting C/O Ka-band at 35.479 until, oh, 4 seconds until he came around the bend.
 

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