[600MRG] 630-meter EM-COMM

[Marshall Cross]

And just want to add that some of the 100 mile groundwave daytime cw contacts were made with simple roll-out on-ground antennas fed by Juma 60 Watt xmtrs. 73, Marshall, W1HK

-----Original Message-----
From: 600MRG [mailto:600mrg-bounces at w7ekb.com] On Behalf Of Frederick Raab
Sent: Tuesday, November 07, 2017 9:17 PM
To: 600mrg at w7ekb.com
Subject: [600MRG] 630-meter EM-COMM

November 6, 2017

Gentlemen:

     As Pat W5THT points out, we have hardly had an amateur band long enough to use it for EM-COMM, and we don't want to hope for the opportunity.

     However, it should certainly be possible:

-  W0RPK and KN8AZN(SK) built a transportable station -
   something you could carry in a van or pick-up
   truck to the place for deployment.  It was used
   on the air and made contacts.

-  We ran a number of tests of ground-wave communication
   and demonstrated 24/7 ionoshere-independent comms
   over about 100 mi or moore.


73, Fritz, W1FR,
Coordinator, ARRL 500-kHz Experiment

Frederick H. (Fritz) Raab, Ph.D.
GREEN MOUNTAIN RADIO RESEARCH COMPANY
1183 Jonquil Lane
Boone, Iowa 50036  USA
Tel.  +1 (515) 275-2141
Cell:  (802) 598-9527
E-mail:  f.raab at ieee.org
Alt:  fraab at gmrr.biz
Web:  www.gmrr.biz
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