kkonrad

Does the UltraDish Radome fit the previous version of dishes?

Wet snow is greatly reducing the signals lately. Initially a few dBs (like the picture below), but as the snow layer gets thicker I see a loss of 10 dB or more.

EDIT: I've found the answer there:

Quote

Q2: Is the new radome compatible with "old" UltraDish, ULD-TP-550? 
A2: No, the radome is compatible only with the new generation UltraDish 27 TP with product ID: UD-TP-27

https://www.rfelab.com/topic/1102-qa-from-april-2021-new-product-release-event/#comment-3387

Too bad.

On August 12, 2020 I set my new Wi-Fi DX record during very strong tropospheric ducting propagation. I logged a 5 GHz Wi-Fi network from Northern Denmark at Dylewska Góra (Dylewska Mountain), Poland at a distance of 745 km using a UltraDish TP 550 antenna with R11e-5HnD radio.

Some info and photos: https://fmdx.pl/2020/08/5ghz-wifi-dx-record-denmark-logged-in-poland-745-km/

More information about the Wi-Fi DXing: https://fmdx.pl/wifi-dx/

I accidentally damaged one pigtail in the TwistPort Adaptor (TPA-RBC) near the waveguide when I was replacing the board.

Is it possible to order a replacement?

Recently I've got an opportunity to perform some measurements using a professional VNA, so I also took the Ultra Dish with TPA-RBC.

The VSWR exceeds 2.0 below 5.17 GHz as expected. 

I used the following MMCX - SMA adapter:
https://www.cdr.pl/p3606,przejsciowka-beczka-sma-m-mmcx-f-sma-j-mmcx-k.html

I am wondering are there any plans for larger Ultradishes? The TP-550 is indeed a great antenna, but in some cases it may be insufficient. I'm thinking about ~90 cm dish or so.

On the other hand, I have recently bought 32 dBi dish from other vendor, but the order and the antenna was actually a total disaster. I returned it immediately…

On 2/26/2019 at 5:22 PM, Douglas Bradshaw said:

10dbi would be enough but would like to see 15deg beam.

The only way to obtain 10 dBi gain with 15° beamwidth (e.g. -3 dB) is to use a signal attenuator between antenna and radio. You can't break the laws of physics.

Hello! Any update on this? I've recently noticed Twistport with RP-SMA connectors, but it would be also great to have such adaptor with N-f connectors available, especially for Ultradishes…

I own an UltraDish TP 550 antenna, which is good for experiments in the field, due to its low weight. It can be easily carried around thanks to the red handle. Also, it has a nice radiation pattern. There also some disadvantages though, like regulation of the elevation angle.

Few months ago we tested it at Dylewska Góra. This is a well elevated location in north-eastern Poland with LOS reaching over 50-70 km. The morning inversion provided good tropospheric ducting propagation and we successfully logged lots of distant Wi-Fi networks, also including indoor domestic routers (provided by Orange and UPC) at distances of over 120 and 140 km (!).

More photos: https://fmdx.pl/2018/08/early-morning-on-dylewska-gora/

I look forward to seeing bigger dishes from RF Elements in the future.

Same problem here. I installed the antenna on a tripod for testing and was unable to take it down...

After putting the bolt and nut it in a vise I finally managed to unscrew them. It took me over 15 minutes and WD40 was somewhat helpful.

I fixed the thread inside nut by tapping it again. I'm going to replace the bolts with brass ones, so they won't seize.

Hello,

I've just received the latest RouterBoard TwistPort adaptor (TPA-RBC), but I can't fit any RB4xx board together with radio module.The product description says:

Quote

 

TwistPortTM Adaptor for RouterBoardTM is compatible with MikroTikTM RouterBOARDTM 9XX, 7XX and 4XX series, as well as with the recent M11 Series. 

 

Now I see that technical data section clarifies that only RB411L are compatible.

Quote

 

Radio Compatibility MikroTikTM: RouterBOARDTM RBM11G, RB91x, RB71x, RB411L

 

Well, OK. Let's try to put RB411L (actually RB411GL, but the miniPCI slot is in the same place) together with…

- SR71-15

- R52Hn

- R52HnD

Unfortunately, all of them are oversized.

I think that listing the RB4xx boards as compatible with TPA-RBC is inappropriate.
Of course, one can use the board, but it is useless without any 2x2 MIMO radio...

OK, thanks for info.

One more question - are there any plans for bigger UltraDishes?

Thank you Jorge for your ultra-quick reply!

Oh, I've been looking for the radiation pattern data some time ago, but it wasn't available yet.

Regarding the VSWR plots - this is RF Element's antenna design, so I won't find anything on MikroTik website.

I'm interested in ULD-TP-550 antenna together with Shielded Adaptor V2 for RouterBoard.

I'm looking for:
1. Radiation pattern data in any format (ant, msi or raw csv, txt, etc.).
2. VSWR plots for full frequency range of typical RouterBoard radio (i.e. 4.9 - 6.1 GHz).

Thank you in advance for your support.