Head to Head Testing - AR1690 v AR1733


Paul Blundell
 

 
Recently I have purchased a small A/B audio switch box, this is being used for direct audio / signal testing of various radios.


 
 
I have mounted this in a small case and have run two 3.5mm audio cables out the back to connect to my radios.
 
My testing process with the below was to tune both the AR1690 and AR1733 to the same strong local FM station and then adjust the volume levels of each to be as close as possible to identical. I then search the band with each radio and tuned them to the same stations at the same time, using the A/B audio switch box, I then compared the signal levels and audio quality between each.
 
 

 
The results are below.

FREQUENCY - STATION
DIGITECH AR1690
DIGITECH AR1733
95.3MHz - TAMAR FM
 
T
96.9MHz - MEANDER VALLEY FM
T
 
98.9MHz - 7AD
T
 
100.5MHz - ABC DEVONPORT
T
 
100.9MHz - 7BU
T
 
101.7MHz - SEA FM BURNIE
T
 
106.9MHz - RPH RADIO
 
T
107.7MHz - SEA FM DEVONPORT
T
 
     
     
As you can see from these test frequencies, the AR1690 worked the best, with the best audio and strongest signals on 6 of the 8 test frequencies.

Next I tuned across the whole FM band and focused on strong local stations. Out of the 14 stations I checked, the results for each are below.

AR1690 = Overall 10/14
AR1733 = Overall 4/14
 
As a first test to develop and refine my process this worked well and produced some interesting results, once our COVID19 bans and restrictions are lifted, I will undertaking more of these tests from various locations.

--
Paul - Moderator
UltralightDX


Richard Allen <dx747j@...>
 

Paul:

Thanks for posting the article.

I’ve been FM DXing since 2010 using barefoot Tecsun ULR, primarily a PL-606.  To date I’ve logged 876 stations from across North America.  I have tried using the Crane Skywave but it isn’t as good as the PL-606.  

Good luck in your research.

Richard Allen,
near Perry OK USA.

,_._,_


Paul Blundell
 

Thanks Richard. It is something that I am really interested in and enjoying.


On Sun, 5 Apr 2020, 12:58 a.m. Richard Allen via groups.io, <dx747j=me.com@groups.io> wrote:
Paul:

Thanks for posting the article.

I’ve been FM DXing since 2010 using barefoot Tecsun ULR, primarily a PL-606.  To date I’ve logged 876 stations from across North America.  I have tried using the Crane Skywave but it isn’t as good as the PL-606.  

Good luck in your research.

Richard Allen,
near Perry OK USA.

,_._,_


--
Paul - Moderator
UltralightDX