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Mithheru

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Just got some info on a couple of DFR7s. These had recent serial numbers, which were more recent than my DFR9.

Definitely looks as though Uniden has recommenced production of the DFR7. Perhaps with my firmware, they've realised its still a damn good little detector. If its still selling well, why stop making it!
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Haha! Just got the first ever mobile redflex detection in NZ on a DFR9. So I found the way to retune the DFR9 to get low frequency K band detection. This gave an equivalent detection of 24.03 against the redflex van.

Now I've got a grip on this, I think I can tweek the sensitivity up a bit to extend the detection range. Work in progress, but it's definitely looking promising. In particular, I think I can get optimal quietness on the K band DFR9 excluding almost all false alerts.
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Okay, after another tweek, I think I've probably got the DFR9 performance about right. But needs now a thorough set of testing.

Here is what I have done....

Basically I noted the K narrow option on the firmware should scan from 24.080 – 24.200. This is really quite narrow indeed. So I have taken advantage of this and tuned the DFR9 up such that 23.96 is tuned up to about 24.08. That means when set to K narrow, the DFR9 should now scan the equivalent of about 23.96 - 24.08. Nothing more and nothing less.

Ka band has to be run wide, as 34.74GHz now comes out around 35.08GHz. However, the effect of running K narrow, means I get super quiet on K band meaning I can also turn K filter OFF, with no gps lockouts so far needed, and overall improvement in range and sensitivity. My first testing gave a confirmed good range detection on real Ka police car in the renowned speed trap at the bottom of the road. Against pole mount redflex, we're just out of range on K narrow, but however this should be perfect for mobile redflex. Just need to find another mobile redflex over the next few weeks and capture the video footage.
 
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Zakk

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Basically I noted the K narrow option on the firmware should scan from 24.080 – 24.200. This is really quite narrow indeed. So I have taken advantage of this and tuned the DFR9 up such that 23.96 is tuned up to about 24.08. That means when set to K narrow, the DFR9 should now scan the equivalent of about 23.96 - 24.08. Nothing more and nothing less.

Ka band has to be run wide, as 34.74GHz now comes out around 35.08GHz. However, the effect of running K narrow, means I get super quiet on K band meaning I can also turn K filter OFF, with no gps lockouts so far needed, and overall improvement in range and sensitivity. My first testing gave a confirmed good range detection on real Ka police car in the renowned speed trap at the bottom of the road. Against pole mount redflex, we're just out of range on K narrow, but however this should be perfect for mobile redflex. Just need to find another mobile redflex over the next few weeks and capture the video footage.
Brilliant - so a question for you. If the same narrow band retune was performed on a US DFR7 could this just cover the essential K Redflex and KA 34.7 freqs? If it largely just beeps on those two this is a great low-cost reliable low false detection solution (along with still detecting KA 34.7 Stalker and Fixed Camera via GPS)
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And another - you've also got me thinking that as I use my NZR7 as a vertical Redflex Camera detector + GPS for fixed cameras (i.e. no 34.7 as that is on another detector) I am only really interested in narrow low K band frequency. Does a R7 have a similar retune capability? Thanks
 
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Mithheru

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Here is proof of concept work on the DFR9.

First video is after initial retune and testing (horizontal mount) (K wide, Ka wide, filter ON)...


Now made a further retune, to optimise redflex into K narrow range, and then setting K narrow and K filter Off (still have to run Ka wide) (also running vertical mount this time).



@Zakk Good questions...

Same thing could be done on the DFR7, lets not jump the gun just yet as I want to see the test against mobile redflex with the DFR9 running the K narrow. Also let's test this against the DFR7 NZ. However, in principle if people don't care too much about the frequency being displayed, and care more for detection, it may be possible to make this work converting back to the US DFR7 firmware. Does anyone know the K narrow range on the US DFR7 firmware? If its the same as the DFR9 then should give same performance as this DFR9 (unless the redesign of the DFR9 does give better performance side by side).

As for the R7, with that having a DSP, I think it's unlikely it's going to let you dial it up like the DFR9 does.
 

Mithheru

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I’m going to be driving up to Dannevirke this weekend so that will give me a real opportunity to test out the retuned DFR9. I will also run another few tests after work today against a pole mount redflex with GPS OFF, comparaing K narrow and K wide. This should help confirm it is in fact just running 33.96-34.08 KHz on K band.

Assuming, everything is working as it should, my gut feeling is that the DFR9 is now looking like a better alround contender than either the R3 or the DFR7. Without need for any filters, I have only had one false on K band, at a location I know I sometimes see 33.96 on the R7. Therefore significantly quieter than even the DFR7 NZ. So, quiet in fact I really need to make sure it is working and also find a redflex van.

Ka detection in real world situations also looking strong, and likely better than the DFR7. I.e. since I am not needing the K filter, the performance would likely be better. Also the DFR9 is a newer redesigned unit, which may also have improved performance relative to the original DFR7.
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Okay, looks as though I've tuned the DFR9 a bit too too high. Pole mount redflex when set to K wide detected at 24.26-24.28, whereas it should have come in centred at 24.21 if I'd tuned as intended. For comparison, the R7 at the corrected tuning indicated today this redflex was operating at 24.091. Thereby the DFR9 was likely running on K narrow at an actual frequency of between 23.90 (if possible) and 24.02.

I've just now therefore retuned a bit to bring the actual scanning range up a bit more. Tomorrow I will retest against the same redflex, and actually retune off the redflex to be centred on 24.21 if needed. This would then give the redflex just outside K narrow, to give a true scanning frequency range on the DFR9 of between about 23.96 and 24.08.
 
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dudeinnz

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Saw this on Facebook marketplace - wellington area
@Mithheru may be good to add to your arsenal for testing redflex etc. I can see an ESP in the photos.

 

LouG

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Ask for the serial number. Just in case it's stolen.
 

dudeinnz

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Ask for the serial number. Just in case it's stolen.
The serial number is in the "for sale ad" which in itself is very "unusual" for facebook radar detector sales ;)
Also I tagged @Mithheru as he has a Ka radar gun, and could very easily check if it was working/alerting or otherwise.
 

Mithheru

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The serial number is in the "for sale ad" which in itself is very "unusual" for facebook radar detector sales ;)
Also I tagged @Mithheru as he has a Ka radar gun, and could very easily check if it was working/alerting or otherwise.
Thanks for the info, however, I am going to pass on this one.
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Okay, looks as though the new 129 R7 firmware has landed. @Zakk one of the new features is the ability to independently turn down the sensitivity on the rear detector. Perhaps time to remove that aluminium!
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Mithheru

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I drove to Dannevirke and back today relying on the DFR9 vertically mounted. I got a save on Ka band on the way back, so pleased with that. I didn't see any redflex vans. However, I got a total of three K falses going, and four on the way back (no filters and no gps lock outs remember!) (i.e. three falses going and coming back were the same, so only in fact four separate falses on K band for the whole trip!). Three of the falses were confirmed as fixed door openers on low frequency (one just outside Levin, one outside the petrol station in Shannon, and one by the petrol station in the middle of Woodville). On the way back I also seemed to pick up a new holden commodore.

Against the false K signal in Woodville. I stopped and measured the frequency on the R7. So what came in at 24.19 right at the top of K narrow on the retuned DFR9, on the R7 this was captured at the correct frequency of 24.098

The false on SH1 on the approach to Levin heading North, I didn't recheck as I've seen that before on the R7 being very low. The one in Shannon, I have also detected before some time ago on a DFR7 below about 24.09.

So overall, the DFR9 is now so quiet, and stunning. All these false alerts are also confirmed to be within its new scanning frequency range of what should actually be between 23.96-24.08. +/- 0.01.

So looks as though my final retune on Friday against the redflex in Whitby looks good (which set the DFR9 tuned to 24.21 so as to be just outside the K narrow on the DFR9). Slightly surprised the Commodore was within K narrow on the way back, as I intended to put these just outside the top end. However, it came in on the DFR9 reporting at 24.19 which is just within K narrow, and probably was actually at around 24.09 ish in reality i.e. probably just below the fixed pole mount redflex in Whitby, and still potentially within a viable mobile redflex range.

So looks like we have a new redflex hunter in town. Definitely recommending the DFR9, and overall in my opinion looking a much better all rounder then the R3 for New Zealand after a retune. Final video capture of mobile redflex detection compared to the DFR7 and R7 would be the icing on the cake. So I'll be out hunting over the next few weeks until I find one. However, if anyone does see one around Wellignton, please give me a heads up with the location. :D
 

Zakk

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Okay, looks as though the new 129 R7 firmware has landed. @Zakk one of the new features is the ability to independently turn down the sensitivity on the rear detector. Perhaps time to remove that aluminium!
@Mithheru Anticipate updating to the new firmware when the NZ 129 becomes available and have asked Blulink NZ about getting the newest firmware. Once I have received will use it to minimise the rear detection as have no need for it in my remote R7 redflex + GPS detector. Not in a hurry as unit is working good with current firmware - have lots of video's now, showing I can consistently get 200m+ Redflex detection and really don't want to backwards from that, so will upgrade and compare against these benchmark videos.

Also have also been pulling bits together for a copper-lined and earthed black plastic vertical case with just the front unscreened, to see if I can reduce non-front falses more than the Aluminium does. Once all this is in place and tested will publish the install setup and results as others may wish to run the same.

Will be keen to do some Laser testing soon but it will be at least 2 weeks away for me as helping moving next weekend :)
 
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dudeinnz

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@Mithheru Anticipate updating to the new firmware when the NZ 129 becomes available and have asked Blulink NZ about getting the newest firmware. Once I have received will use it to minimise the rear detection as have no need for it in my remote R7 redflex + GPS detector. Not in a hurry as unit is working good with current firmware - have lots of video's now, showing I can consistently get 200m+ Redflex detection and really don't want to backwards from that, so will upgrade and compare against these benchmark videos.

Also have also been pulling bits together for a copper-lined and earthed black plastic vertical case with just the front unscreened, to see if I can reduce non-front falses more than the Aluminium does. Once all this is in place and tested will publish the install setup and results as others may wish to run the same.

Will be keen to do some Laser testing soon but it will be at least 2 weeks away for me as helping moving next weekend :)
Look forward to the pictures of your install, looks interesting!
 

dudeinnz

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@Mithheru @Rybina01 just mentioned to me he upgraded to 1.29 on his R7 and went past a redflex with no alert.
He was on K-wide, but had a few filters on. He is going to go see if the van is still there and report back. Just something to keep in mind.
 

Rybina01

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@Mithheru @Rybina01 just mentioned to me he upgraded to 1.29 on his R7 and went past a redflex with no alert.
He was on K-wide, but had a few filters on. He is going to go see if the van is still there and report back. Just something to keep in mind.
Im running a R7US on update 1.29


This video shows my first run in with the redflex van on update 1.29. On 1.24 the R7 alerted to the one and only redflex van I saw. This detection was really good about 300 to 500 meters facing away from us.

I did some testing before the reflex van drove off. I determined that the R7 didn't alert once out of 9 times I pasted it, 5 times going away from it and 4 times heading towards it. the first video the R7 was low on the windscreen. this was only 2 of the attempts, I then placed the R7 higher up, like this.
20200126_185918.jpg

I found 0 difference. I decided to try it against the speed camera on the Ngauranga gorge, I usually pass this camera with 20 to 30 meters before I get to the "kill zone" (coming from behind). The 1.29 update, I was on it and about 10 to 20 meters in the "kill zone" K band started to detect the camera, when I turned around facing the camera it picked it up at a normal distance then in the kill zone didn't pick up a signal which it has never done this before.

I haven't found a police officer using Ka band yet on the new update, so I have no idea but K band has defiantly changed for me and it seems less responsive.

I would like to add that some of the distances that @Mithheru has posted on Ka band I haven't experienced, this could be due to police not using C/O or possibly my R7 was damaged in posting, but the K band has had a big change due to this update.
 

dudeinnz

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Those are some worrying reports.

@Rybina01 if you still in Wellington, perhaps tee up a time with @Mithheru if he has time to do a test on your R7. I did some fires of my 34.7 ATR after updating to 1.29 and got alerts.
 

Mithheru

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@Mithheru @Rybina01 just mentioned to me he upgraded to 1.29 on his R7 and went past a redflex with no alert.
He was on K-wide, but had a few filters on. He is going to go see if the van is still there and report back. Just something to keep in mind.
Interesting findings.

I took both the R7 and the DFR9 with me this weekend. I didn't see a redflex on my travels. However, I confirmed detection of low frequency K band below 24.09 on both the DFR9 and also the new R7 1.29 firmware. Therefore its not a frequency thing, but perhaps the DSP version is now less sensitive to redflex. That would be a bit of a setback then.

Perhaps I will keep my laptop so I can run both firmware versions of the R7 past a mobile redflex as well as the DFR9.

@winterbrew Let me know how you get on with the new R7 firmware also.
 

Zakk

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...the K band has had a big change due to this update.
The US Beta-testers probably don't have ready access to low band low power Redflex like we have here. An attempt to reduce and balance BSM falsing in 129 might have included tampering with the front maximum low power K sensitivity that we depend on for Redflex. @Rybina01, what were your %, K Filter, TSR etc. settings?
 
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Mithheru

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@Rybina01 The detection against redflex on horizontal mount is also much harder. It is possible in that location, the angle of the radar signal is just too short to get picked up. If you put the R7 on its side at least for one of the runs, that should have picked it up. In testing both R7 and DFR9 against redflex, I always test on their side.

When retuning the DFR9 against redflex, even when parked in line of sight of the camera, the sensitivity bar more than doubled just by turning the detector sideways.
 

Rybina01

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The US Beta-testers probably don't have ready access to low band low power Redflex like we have here. An attempt to reduce and balance BSM falsing in 129 might have included tampering with the front maximum low power K sensitivity that we depend on for Redflex. @Rybina01, what were your %, K Filter, TSR etc. settings?
Yes I forgot to mention it

My first to 4th attempt was with K wide, K block on and K filter on.
My 5th and 6th was with K wide, with K block and K filter off.
My 7th to 9th attempt, I factory reset the R7 in the settings, this turned on K wide, K block and K filter on, but made Ka narrow which didn't effect the results.

I ran past the Speed camera with 7th to 9th settings and those were the results. I would like to test the 1.24 and 1.29 K band with the speed camera, to get a better look at the K band on both.
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@Rybina01 The detection against redflex on horizontal mount is also much harder. It is possible in that location, the angle of the radar signal is just too short to get picked up. If you put the R7 on its side at least for one of the runs, that should have picked it up. In testing both R7 and DFR9 against redflex, I always test on their side.

When retuning the DFR9 against redflex, even when parked in line of sight of the camera, the sensitivity bar more than doubled just by turning the detector sideways.
I will have to test that next time, I did think about it when I was halfway through testing, but I just shoot out of the house not thinking until I was doing the test. I know those vans don't sit around for to long.
 
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LouG

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@Mithheru Anticipate updating to the new firmware when the NZ 129 becomes available and have asked Blulink NZ about getting the newest firmware. Once I have received will use it to minimise the rear detection as have no need for it in my remote R7 redflex + GPS detector.
Can you minimise rear K alone? I certainly wouldn't sacrifice rear Ka. I've had too many rear alerts that were cops behind in traffic.
 

Zakk

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Can you minimise rear K alone? I certainly wouldn't sacrifice rear Ka. I've had too many rear alerts that were cops behind in traffic.
No, but have no need as I use a old dedicated 9500ci antenna setup purely for 34.7 rear detection and another 9500ci for front 34.7 detection. All into an audio mixer and single speaker. Allows individual tuning. It’s a bit enthusiast for sure however like running seperate stereo components each part does what it’s good at.
 
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