The PMRC Digital Education Net

PMRC repeater: 147.030 PL 91

A voice and data net to discuss digital modes

Every Tuesday evening at 1900 (7:00 PM)

Ron and I are looking into topics to investigate for the next few weeks on the DEN.

If you have ideas, then please forward them to both Ron and to me.

We've done a dozen topics over the last few years.
We recently have revisited  JS8  (an FT8 chat mode) and in fact, this weekend was a kind of  JS8  contest.  Did you participate?  If so, let's hear from you Tuesday night.

JS8 CALL  contest
I heard nothing on Sunday on 3578, 7078 kHz even tho I called CQ a few times.  I did hear some activity on  14.078  and identified a few JS8 call signs, and then got a few contacts.  However, other than a name or a rig,  JS8 QSO  was not all that different from a  FT8  contact.  It is difficult to carry on a longer QSO  with JS8  at such a slow speed.  So...  I was not impressed.

Yet I did not see (or hear) any RTTY  this weekend, and not a whole lot of  PSK31  either on 80m or  40m.  Some PSK31 on  20m  (DX) during daylight hours (14.070).  I never hear  Olivia, MFSK, or THOR  on 20m.

So .... what next for the DEN topics?

The request for  CW  practice did not meet with much enthusiasm during the DEN, but perhaps PhilMont should look into a new, distinct net entitled  CW  Training  (using MCW)  at a different time from the DEN. That might be useful for the greater Philadelphia region. CW is certainly not disappearing on HF bands, although I wonder about the average age of the ops now.

Some topics of interest to me to explore on the DEN
1)  Calibrating your  HF  VFO  dial accuracy (to the nearest +/- 1 Hz)
      Requiring no extra equipment at all
      (See May QST,  Technical Correspondence) for one idea
2)  Sound card oscilloscopes  -  there are a few "free" ones
        This app can show a lot more than your ears can hear
3)   EME  (bouncing signals off the Moon)  -   Whoa  ...  really?
4)  160 meters  ....  unexplored territory for digital modes but can you get an antenna that will radiate?
5)  SDR's  and digi modes: what's new, how does it work, what's it cost?
      I love the little  SDR play  that I have now... fantastic diagnostic tool.
6)  Antennas  -  what HF  wire antennas work well for a small $ 
          End-feds  vs.  off-center-fed,  vs  center fed  dipoles
         Resistance, Reactance, and Impedance -  what ?
         There is a new ARRL booklet that covers this well

Ideas for the DEN:     Ron and I are looking for feedback.

Field Day  -  preps  for a  HF  DATA  station?  Who is ready for this?
        We need to avoid QRM with other adjacent non-data stations


Allstar is a voice over IP communication mode based on the Asterisk PBX platform.
An analog type transceiver is connected to other Allstar nodes via the Internet.

Doug, WA3DSP, developed the code to run Allstar with an inexpensive Raspberry PI.

For more information see:

Thanks to Doug and the Philmont club for setting this up.


If anyone is interested in HF NBEMS nets there is a group called Pa NBEMS Net

To join the group click here: PA NBEMS

NBEMS stands for Narrow Band Emergency Messaging System.

The Pa NBEMS Net meets every Sunday morning at 0800L using Fldigi at 3.583
Barry, K3EUI, is the net manager.

We would like to see more participation from the DEN members.