Back in Sept. 2021, I decided to connect with HamWAN's Puget Sound Data Ring (PSDR) in order to have Winlink capability in an emergency.  Based on HamWAN's PDF comparing various devices that shows the QRT 5 ac along with many others        http://hamwan.org/Standards/Component%20Engineering/Client%20Hardware/antenas_mantbox.pdf <http://hamwan.org/Standards/Component%20Engineering/Client%20Hardware/antenas_mantbox.pdf I decided to investigate if the QRT 5ac would work on the PSDR.  Flytec Computers had it in stock and the salesperson assured me it would work or they would take it back and refund my money.

So I purchased a MikroTik QRT 5ac flat panel antenna and had it operational on HamWAN's Puget Sound Data Ring (PSDR)  using the guidance on http://hamwan.org/Standards/Network%20Engineering/Client%20Node%20Configuration.html and Dan K7MM Ransom's Feb. 2016 video http://hamwan.org/Standards/Network%20Engineering/Client%20Node%20Configuration/Configure%20Radio%20Modem_1080%20dlr%20.mp4 demonstrating how to use the guidance.

When I first turned it on, I found that within about 48 degrees of bearing the antenna was picking up three HamWAN sites: Gold (19 miles); Buck (30 miles) and Blyn (42 miles).  Cloud cover on the Buck Mt. site Line of Sight (LOS) frequently reduces the signal strength to such a degree that it is dropped from the "scan" list.  Depending on the weather and clouds, the QRT 5ac picks the best signal at any particular moment which was generally Gold.  So Gold was the site which I kept  the QRT 5ac pointed at.  After Gold and Blyn were decommissioned, I pointed the QRT 5ac at Buck and Winlink messages would transmit within a few seconds even in bad weather.  I did not keep the QRT 5ac on continuously as my primary interest was having emergency communications. 

Be sure to order the "International" version and not the "US" version.

73
Alan WX7L

P.S.  Below is an email to Nigel K7NVH on my Sept. 26, 2021 PSDR experience.  My thanks to Nigel for generously volunteering to Elmer me.   The email contains information from the QRT 5ac via the WinBox operating software utilizing the "/interface wireless scan 0" and  "/interface wireless monitor 0" commands.
---------- Forwarded message ---------
From: <WX7L@winlink.org>
Date: Sun, Sep 26, 2021 at 1:05 PM
Subject: QRT 5ac Signal Reports for radio-name: S2.Blyn/K7WAN; Buck-S2/K7WAN; and, Gold-
To: <nigel@nigelvh.com>
Cc: <wx7l@westseattlearc.org>

Nigel,
The clouds rolled in over Gold Mt., so I thought I would see what sort of connection I could get with Buck.  While swinging the QRT 5ac further north I found another signal and locked onto it.  I then checked the signal in WinBox and found I was connected to S2.Blyn/K7WAN and getting a much better tx/rx rate than with Gold.  Below is the information for  Blyn, Buck, and Gold.  These were taken within the past half hour.  If you have the location and radio information for the Blyn site I would appreciate it.
73
Alan



admin@WX7L-Gold] > /interface wireless scan 0
Flags: A - active, P - privacy, R - routeros-network, N - nstreme, T - tdma, W - wds, B - bridge
       ADDRESS           SSID                            CHANNEL                       SIG   NF SNR  RADIO-NAME                          ROUTEROS-VERSION                         
A RT B E4:8D:8C:F1:6D:22 HamWAN            5900/5/an                        -82  -109  27   Gold-S2/K7WAN                     
A RT B C4:AD:34:D3:8D:8C HamWAN           5900/10/an                      -80  -111  31   S2.Blyn/K7WAN                     
A RT B 64:D1:54:98:2F:21 HamWAN              5900/10/an                     -86   -111  25   Buck-S2/K7WAN                     

[admin@WX7L-Gold] > /interface wireless monitor 0                                                      radio-name: S2.Blyn/K7WAN
                  status: connected-to-ess
                 channel: 5900/10/an
       wireless-protocol: nv2
                 tx-rate: 21.6Mbps-10MHz/2S/SGI
                 rx-rate: 13Mbps-10MHz/2S
                    ssid: HamWAN
                   bssid: C4:AD:34:D3:8D:8C
              radio-name: S2.Blyn/K7WAN
         signal-strength: -81dBm
     signal-strength-ch0: -83dBm
     signal-strength-ch1: -84dBm
      tx-signal-strength: -78dBm
  tx-signal-strength-ch0: -82dBm
  tx-signal-strength-ch1: -80dBm
             noise-floor: -111dBm
         signal-to-noise: 30dB
                  tx-ccq: 48%
                  rx-ccq: 32%
   authenticated-clients: 1
        current-distance: 68
                wds-link: no
                  bridge: no
        routeros-version: 6.47
                 last-ip: 44.24.245.1
     notify-external-fdb: no                                                                                                      radio-name: S2.Blyn/K7WAN

[admin@WX7L-Gold] >

[admin@WX7L-Gold] > /interface wireless scan 0   
Flags: A - active, P - privacy, R - routeros-network, N - nstreme, T - tdma, W - wds, B - bridge
       ADDRESS           SSID                            CHANNEL                       SIG   NF SNR  RADIO-NAME                          ROUTEROS-VERSION                         
A RT B E4:8D:8C:F1:6D:22 HamWAN            5900/5/an                        -86 -107  21    Gold-S2/K7WAN                     
A RT B 64:D1:54:98:2F:21 HamWAN              5900/10/an                     -76 -112  36     Buck-S2/K7WAN                     
  RT B C4:AD:34:D3:8D:8C HamWAN            5900/10/an                      -90 -112  22    S2.Blyn/K7WAN                     

[admin@WX7L-Gold] > /interface wireless monitor 0                                                             radio-name: Buck-S2/K7WAN
                  status: connected-to-ess
                 channel: 5900/10/an
       wireless-protocol: nv2
                 tx-rate: 21.6Mbps-10MHz/2S/SGI
                 rx-rate: 14.4Mbps-10MHz/2S/SGI
                    ssid: HamWAN
                   bssid: 64:D1:54:98:2F:21
              radio-name: Buck-S2/K7WAN
         signal-strength: -78dBm
     signal-strength-ch0: -81dBm
     signal-strength-ch1: -81dBm
      tx-signal-strength: -78dBm
  tx-signal-strength-ch0: -80dBm
  tx-signal-strength-ch1: -82dBm
             noise-floor: -111dBm
         signal-to-noise: 33dB
                  tx-ccq: 38%
                  rx-ccq: 38%
   authenticated-clients: 1
        current-distance: 48
                wds-link: no
                  bridge: no
        routeros-version: 6.42.6
                 last-ip: 142.250.69.202                                                             
     notify-external-fdb: no                                                                                                         radio-name: Buck-S2/K7WAN

[admin@WX7L-Gold] >
[admin@WX7L-Gold] > /interface wireless scan 0   
Flags: A - active, P - privacy, R - routeros-network, N - nstreme, T - tdma, W - wds, B - bridge
       ADDRESS           SSID                            CHANNEL                       SIG   NF SNR   RADIO-NAME                          ROUTEROS-VERSION                         
A RT B E4:8D:8C:F1:6D:22 HamWAN            5900/5/an                        -70 -109  39     Gold-S2/K7WAN                     
A RT B 64:D1:54:98:2F:21 HamWAN             5900/10/an                       -80 -112  32     Buck-S2/K7WAN                     

[admin@WX7L-Gold] > /interface wireless monitor 0                                                    radio-name: Gold-S2/K7WAN
                  status: connected-to-ess
                 channel: 5900/5/an
       wireless-protocol: nv2
                 tx-rate: 7.2Mbps-5MHz/2S/SGI
                 rx-rate: 3.6Mbps-5MHz/1S/SGI
                    ssid: HamWAN
                   bssid: E4:8D:8C:F1:6D:22
              radio-name: Gold-S2/K7WAN
         signal-strength: -71dBm
     signal-strength-ch0: -73dBm
     signal-strength-ch1: -75dBm
      tx-signal-strength: -71dBm
  tx-signal-strength-ch0: -74dBm
  tx-signal-strength-ch1: -74dBm
             noise-floor: -108dBm
         signal-to-noise: 37dB
                  tx-ccq: 38%
                  rx-ccq: 21%
   authenticated-clients: 1
        current-distance: 31
                wds-link: no
                  bridge: no
        routeros-version: 6.43.4
                 last-ip: 172.217.14.206
     notify-external-fdb: no                                                                                                   radio-name: Gold-S2/K7WAN

[admin@WX7L-Gold] >

=========================================================================================

P.P.S.  Here is some additional information on the radio sites and from where I purchased my QRT 5ac:

Google Maps for Blyn Radio Site: https://www.google.com/maps/place/Blyn+Radio+Site/@48.006345,-122.972436,231m/data=!3m1!1e3!4m5!3m4!1s0x0:0xdc9d4176b55add1a!8m2!3d48.0062919!4d-122.9729022?hl=en-US

WX7L QTH to Blyn Radio Site  
Latitude: 48.00625  Longitude: -122.972917
Locator: CN88MA31GM  (map, sat, terrain, hybrid)
Distance from CN87TM38HV - 68.087 km (42.31 mi)                    
Bearing ~ 320.32° (reverse bearing ~ 140.32°)
Midpoint - lat: 47.772071 lon: -122.679586

 WX7L QTH to Gold Mt.
Latitude: 47.547743  Longitude: -122.804514                
Locator: CN87ON31  (map, sat, terrain, hybrid)
Distance from CN87TM38HV - 31.217 km (19.4 mi)
Bearing ~ 272.37° (reverse bearing ~ 92.37°)
Midpoint - lat: 47.542679 lon: -122.596593

Bearing Degrees from WX7L QTH to Gold Mt Less WX7L QTH to Blyn Radio Site   
                         320.3 - 272.4  = 47.9 
Note:  I became interested in the flat panel antennas because Ian KE7MAP Gallagher and Kevin KI7HRC Gow had brought in their HamWAN nodes to club breakfasts several years ago, which were smaller than mine and very portable.  I also read the test results of WA7ONY using the predecessor QRT model from various locations (see http://www.stargazing.net/david/sdr/HamWAN.html) in Oregon and southern Washington.  It seemed like the newer model would be a good choice for both portable operations and also for linking to Gold Mt. which is 19 miles from my QTH.  I was amazed when I linked 42 miles to Blyn.

Mikrotik QRT 5 ac dual chain 5GHz outdoor flat panel 24dBi antenna with built in routerboard International Version  https://mikrotik.com/product/RB911G-5HPacD-QRT

 https://flyteccomputers.com/mikrotik-rb911g-5hpacd-qrt    currently out of stock

                        I purchsed from FlyTec for $167.99 + $25.04 tax = $193.03 and received it in about a week