Showing posts with label Real MMDVM_HS_Hat Genuine. Show all posts
Showing posts with label Real MMDVM_HS_Hat Genuine. Show all posts

MMDVM_HS_Hat boards in the mail

#MMDVM_HS_Hat boards for @DM9KS, @do2bn and @dh6kq successfully baked and tested.

Now in the mail to the recipients.

Onboard ceramic antenna(RainSun)

SMA socket external antenna

MMDVM_HS_HAT dual band (VHF/UHF) operation

MMDVM_HS_HAT dual band (VHF/UHF) operation

Just discover you can VHF (144-148 MHz) support for ZUMSpot by an external 18 nH inductor between L1 and L2 pins of ADF7021. This will enable dual band (VHF/UHF) operation.

How to Identify a Genuine MMDVM_HS_Hat:

How to Identify a Genuine MMDVM HS Hat by florian Wolters.

To help distinguish between an orginal #MMDVM_HS_Hat and a clone have a look at the two pics below. The first one is an original board revision 1.2 manufactured by us.  It has the name “MMDVM_HS_Hat” on it in the upper right part. The silkscreen is properly placed and our callsigns are clearly readable. In addition to that there is the Open Source Hardware (OSHW) logo on the lower left.

Real MMDVM_HS_Hat Genuine
Real MMDVM_HS_Hat Genuine

The next picture shows the clone. It is only revision 1.1 and has misplaced silkscreen in the area of our callsings. The OSHW logo was removed as well as the “_HS” suffix on the name. Secondly it seems as if the RF parts are of poor quality. The picture is courtesy of Lindsay, VK2AMV.

Fake MMDVM_HS_Hat False and copy
Fake MMDVM_HS_Hat False and copy
 Warning - FAKE - CLONE - pirates of the MMDVM_HS_Hat board

SMA-M Antenna Dual Band VHF/UHF 144MHz/430MHz

SMA-M Soft Walkie Talkie Antenna Dual Band VHF/UHF 144MHz/430MHz




  • Connector type SMA-M; before you order it please confirm the radio model on the listing
  • Dual Frequency 144/430MHz; Apply to lots of 2 way radio
  • Gain 2.15dBi; Max Power 10Watts and it can extend the range of your communication
  • Antenna Length 6.5cm allow it convenient to carry and you can put it in your pocket
  • Simple and Convenient return process; 60 days warranty provide by us and 30 days no reason to return

MMDVM_HS_HAT Antenna Build

MMDVM_HS_HAT Antenna Build

Case was the recommended for the #MMDVM_HS_HAT. Antenna is a Retevis soft antenna, selected because it was short and weight was at the bottom for stability.

SMA-M Soft Walkie Talkie Antenna Dual Band VHF/UHF 144MHz/430MHz
(Retevis RT20)

  • Connector type SMA-M; before you order it please confirm the radio model on the listing
  • Dual Frequency 144/430MHz; Apply to lots of 2 way radio
  • Gain 2.15dBi; Max Power 10Watts and it can extend the range of your communication
  • Antenna Length 6.5cm allow it convenient to carry and you can put it in your pocket
  • Simple and Convenient return process; 60 days warranty provide by us and 30 days no reason to return

MMDVM_HS ZUMspot v1.0.2

MMDVM_HS ZUMspot v1.0.2

Seems like latest version of firmware enables full power output of ADF7021 chip. You may want to update your boards

MMDVM Pi Hat HS

Most definitely the MMDVM Pi Hat HS

SMA socket external antenna


#MMDVM_HS_Hat

#MMDVM_HS_Hat += 2

Top : SMA socket external antenna
Bottom : Onboard ceramic antenna(RainSun)

MMDVM_HS Hat Accessoires - OLED display

MMDVM_HS Hat Accessoires - OLED display

An OLED display also to be found at amazon: Display

Für größere Ansicht Maus über das Bild ziehen
MaxDirectX 0.96" Inch I2c IIC Serial 128x64 Oled LCD Oled LED Module for Arduino Display 51 Msp420 Stim32 SSD1306 Module for Arduino Raspberry Pi Display

MMDVM_HS hotspot code

Beeeeeepppp #15 and #16
Will be shipped tomorrow.


MMDVM_HS_Hat project


The #MMDVM_HS_Hat hardware works fine. Was a fun project to build. Now to setup the radio properly. Thanks to the builders


Testimonial MMDVM_HS_Hat

My works perfectly in the whole house!    The hat is in the basement and i have good reception in the shack under the roof.

MMDVM_HS_Hat board

Flo (DF2ET) @flo_0_ Oct 26
Next two #MMDVM_HS_Hat boards populated and now in the oven. #hamradio #nevernotbuilding


The top 3D printers and printing services in Toronto Canada

3D printers and printing services in Toronto Canada have grown over the years as much as the technology has. There was most definitely an explosive amount of interest a few years ago, and while the buzz has subsided a bit, the industry continues to evolve and become more accessible to everyone.

Here are my picks for the top 3D printing services in Toronto.