Showing posts with label Aiulence. Show all posts
Showing posts with label Aiulence. Show all posts

Tuesday, November 10, 2020

Great, another DMR radio? But, with real 220 MHz?

Alinco was the first main stream amateur radio vendor to offer a DMR radio way back in 2016 with its  DJ-MD40 UHF only radio.  Less than two years later, they came to market with the dual band DJ-MD5TGP which included a GPS and was roughly based on the same reference design as the popular Anytone D878UV. Main stream being defined as Alinco often being included alongside Icom, Kenwood and Yaesu.

With many other radios such as the TYT MD-UV380, Radioddity GD-77, Baofeng DM-1801 and Ailunce HD1 offering dual band spectrum coverage at various price and feature differences, it looks like Alinco is about to offer its second generation version of its 2018 released "MD5" radio for short and it will offer a few things not found elsewhere, including a third band for some markets! 

This now further cements that Alinco is only going to focus on DMR for the amateur market, Kenwood and Icom on D-Star and Yaesu on Fusion for the time being until hopefully the HVDN backed M17 project and its TR-9 open source radio finds a manufacturing partner in China or maybe with one of the main stream vendors to stop fragmentation with so many competing digital modes.

How many MD5 are there?

There has always been some confusion while looking at discussion boards on Facebook as to how many different MD5 radios are there and the answer has always been two.

The DJ-MD5TGP has been the more expensive version and included a GPS.  The slightly lower cost DJ-MD5T is identical, but does not have the GPS and typically sells for $20 less.  Both versions are covered under the FCC ID of PH3DJ-MD5. The earlier DJ-MD40 can be found under FCC ID PH3DJ-MD5. 

The new, but not yet FCC certified Alinco DJ-MD5XT is going to likely require its own FCC ID as early documentation shows that this will be the first true tri-band DMR radio which will cover the 2m, 70cm and 1.25m amateur radio bands, plus extended receive above and below the VHF and UHF bands as usual. 

Looking in the just released computer programming software available on the Remtronix website, it clearly shows an option under MHF for 220 to 225 MHz.













Hackers are already salivating....

When it was discovered that certain band combinations would allow reception and transmission above 480 MHz just like in the Anytone D878UV and BTECH 6X2, Alinco was quick to issue new firmware to prevent this, but was easily bypassed with a 3rd party software tool to enable 480 to 520 MHz coverage. 

These extra frequencies are sought after in countries like Australia where there are UHF CB channels and in the United States where first responders such as New York City Police and Fire user channels above 480 MHz. 

Without spending time attempting to get an Alinco MD-5TGP with or without the patched 1.13c or 1.10 firmware to work with the CPS 1.09a meant for the new Alinco DJ-MD5XT, it would likely appear that the new Alinco DJ-MDXT due to having a band option meant for 1.25m should suggest there is different hardware inside that will offer safe operation of the 220 MHz band.

While many radios mentioned in this article can be "hacked" to give the impression they will work on the 1.25 band, it is not suggested to transmit as it will ruin the RF power amplifier and filtering in the radio since it is not designed for that spectrum.  Hopefully the Alinco DJ-MD5XT will support this great and underutilized band available only in the United States and few other countries globally. 

Related Reading


Thursday, March 8, 2018

Basic Digital Voice Infrastructure Round Up (Q1 2018 Edition)

In October of 2016, Steve K2GOG made a presentation at the Overlook Mountain Amateur Radio Club of Ulster County New York at its monthly membership meeting.

At that point in time according to Repeaterbook.com, there were 45 DMR repeaters across all of New York State.

Fast forward to March of 2018, that count has increased to 61 according to the same website.

What about Fusion, D-Star Repeaters in New York?
  • D-Star had 29 and is now up to 33
  • Fusion had 32 and is now up to 39
What about global growth of digital voice repeaters?
  • 2,204 Fusion repeaters (1,431 in Oct. 2016)
  • 2,315 D-Star repeaters (2,051 in Oct. 2016)
  • 2,326 DMR repeaters (1,493 in Oct. 2016
  • 330 P25 repeaters (213 in Oct. 2016)
  • 107 NXDN repeaters (82 in Oct.2016
How much growth has there been since October 2016?
  • 154% growth for Fusion
  • 112% growth for D-Star
  • 156% growth for DMR
  • 155% growth for P25
  • 130% growth for NXDN
With Icom's D-Star being the oldest digital voice technology at 15 years, its days of accelerated growth are unlikely due to a lack of new radio equipment being introduced. The newest radio supporting D-Star is Kenwood's tri band TH-D74 handheld at $550 USD.  A dual band FT-70DR Yaesu Fusion radio can be had new for as low as $199.99. Icom's only current dual band D-Star hand held radio is the $390 ID-51.

There are multiple dual band hand held options from different vendors however for DMR ranging from $86 for the Radioddity GD-77 at the low end and no less than 4 others from vendors such as alinco, Anyone, Aiulence, Retevis and TYT for between $150 to $200.

There are also commercial radios that can be purchased new or at reduced cost for used options for DMR, P25 and NXDN. DMR is the only mode supported by non-commercial radio vendors though.

What about non-repeater use?

Hot spot devices such as the Shark RF OpenSpot, MMDVM based ZUMSpot, JumboSpot, NanoSpot devices and a few others allow users not near a repeater to talk globally. All of these devices are capable to support most all modes listed above and a few able to cross mode translate. This function allows a user to use a DMR radio to talk on D-Star or Fusion networks as an example.

According to Brandmeister Network, there are 5,498 hot spots currently connected to its network which is interesting given that there are only 7,282 digital voice repeaters accounted for globally. Combined, repeaters and hot spots make a very robust communications network for both local and global communications.


Democratized Modern Radio 

Digital voice infrastructure would not be needed if there were no users looking to access it, so a rough conservative estimate is that there should be between 350,000 and 700,000  hand held digital amateur radios in somewhat frequent use globally based on repeater and hot spot deployment figures. That figure is based on the following criteria:
  • Number of known registered DMR users
  • Number of hot spots currently internet connected 
  • Number of repeaters currently internet connected
  • Number of repeaters not internet connected
  • Number of DMR handheld radio products sold in last 12 months on E-Bay
  • Estimated number of D-Star and Fusion users and equipment currently in use. 

Leave a comment about estimated hand held or combined with other form factors below.