Wednesday, January 29, 2020

New talk group found on the Spotsylvania P25 system tonight.  5017 "encrypted"

Tuesday, January 14, 2020

DMR Plus and the ZUMSPOT

Connecting to DMR+ reflectors using a hotspot. 












https://dmr-marc.net/FAQ/dmrplus-america.html


I have not done this yet but I want to try.  I am told that I incorrectly programmed my code plug.  I thought that each reflector needed to be a separate group contact.  This is not the case.   All you need is talk group 9 to be the group contact to pass traffic. 

Add any reflectors that you would like to use in your radio code plug as well. Any reflector you want to add needs to be setup as a private call in your contacts instead of group call. Then create a channel with the reflector contact that you just created, then add the channel to a zone. To link to a reflector you will then have easy access by selecting the zone you just programmed these into. When selected, key your mic and you should get an acknowledgement that you are now connected to that reflector.  If you want to hear the confirmation what you've done you need to include TG9 in the RX group for this channel, because the annunciation goes out on TG9.   

There are also two special id’s on either side of the reflector range that must be sent as private calls:
  • 4000 – Issuing a private call to 4000 will disconnect a reflector 
  • 5000 – Issuing a private call to 5000 will tell you which reflector is connector (or none)

Friday, January 10, 2020

Extra Class - Chapter 2 - Operating

Extra Class - Chapter 1 - Introduction

Virginia DMR repeaters are on the move

According to T-marc the following repeaters are moving:

443.0625  N3QEM - Arlington   - T-Marc has received a request to move this repeater to Tyson's Corner.

442.1125 N8RAT - Stafford -  T-Marc has received a request to move this repeater to Spotsylvania County.

Thursday, January 9, 2020

Understanding Resonance in Series RLC Circuit

https://www.electronics-tutorials.ws/accircuits/series-resonance.html


Hint for Extra Class Test 


Look for words in the questions:  Capacitor (Xc) will be more capacitive and therefor below the horizontal axis on the rectangular coordinate graph and the word Inductor in the question (X sub L) will be more inductive and therefor above the horizontal axis on the rectangular coordinate graph. 

ELI the ICE Man - Extra Class Study









I have found my trick to answering the extra class test answers is look at the X (sub c) figure and if the X (sub c)  figure is larger that the circuit has capacitance.  It is an ICE circuit.  Voltage is lagging the current by 90%.  All of the formulas point to a 14% phase angle.   

If the X (sub l ) number is larger the opposite is true. The circuit has inductance. The Current lags the voltage by 90% with a 14 degree phase angle.  

Thursday, January 2, 2020

Did you know there is a place for Scanner Junkies to discuss radio on DMR?

Introducing the "Scanner Junkies" Talkgroup on the TGIF DMR network. 

http://wiki.tgif.network/index.php?title=The_Scanner_Junkies

A DMR talk group designed for all aspects of the Scanner Radio Hobby. Public Safety Scanning, Race Scanning, Railroad Scanning, Air band Scanning, SDR dongle use, and Shortwave Listening.
It doesn't matter if you use the latest IQ software defined scanners or an old crystal receiver. You have come to the right place. We will focus on the use of scanner radios, fire pagers, Shortwave receivers, air-band radios, and wide band receivers, scanner radio apps, websites, and just about any other technology used today in the hobby.
The talk group number 1033 was chosen as the best representation of the 10 code 10-33 "emergency traffic" that you used to hear used all the time in monitoring public safety radio. Watch this wiki for links to hobby related clubs, newsletters, email groups, discussion boards, etc.

How to I find talkgroup 1033 on the TGIF Network?
Point your hotspot to the TGIF Network. Then keyup and make a QSO and the talkgroup will become dynamic.

Yaesu FT-70D and Zumspot

I have been learning a few real tricks to controlling the Zumspot via my Radio. The Zumspot
runs on the popular P-Star software.


Here are a few instructions: 

To connect to popular FCS reflector rooms such as America Link and America Rag Chew:

1.  First configure your pi-star software to use the YSF mode. 
2.  Set your radio to Wires-x mode to utilize the room linking commands.
     Click on the F (Function Key) and Click on the AMS key (Wires X mode)
3. Twist your top channel selector knob to display "En*"
4. Using the keypad enter the following numbers for the above popular rooms:

    00140 = FCS285 America Rag Chew
    00142 = FSC290 America Link

5. To complete the connection press the AMS key again.

The hotspot should connect to the reflector.

 I will edit this post with more that I find.

You can also connect to wires YSF reflectors by using the codes found on the
left hand column of the chart linked below.

https://www.pistar.uk/ysf_reflectors.php

Some FCS and YSF reflectors are linked together.

Some of the more populear YSF reflectors I have found are:

21636 - Texas Nexus
37099 - Quadnet Array
95984 - SouthEast Link
66497 - Street Corner

Welcome Back to Blogger - KD4IIW (aka Dispatchnerd)

I am going to resurrect my blog.  I have a renewed interest in sharing information and Scanning and Amateur Radio.    I am active on most amateur radio digital modes:  DMR, Dstar, and Fusion.   The hobby is aided with the use of the internet and multi-mode digital hotspots.    I am currently studying for the upgrade to Amateur Extra.

My latest project - DSTAR DVAP on Pi-Star

I was wanting to build a raspberry pi based DSTAR access point using a old DVAP device. I searched online for instructions explaining how...