July 2020: The following is a brief After Action Report on Military Radio training operations at Forward Operating Base COVID, July 2020. Scheduling difficulties required delaying from the June 2020 ARRL Field Day. No worries. No QRM. A few preliminaries:
I operated from a shady clearing up in the Sierra Nevada mountains for 4 days while “social distancing” from nearly everyone else. The weather, chow and comms were great, As Per Usual. The primary radio equipment I used was all “ex” military.
The dirt roads into this box canyon are always pretty scenic. About 40 miles north of Yosemite National Park. Second gear, 1200 RPM, back country Recon. This spot is within 155 mm range from the USMC Mountain Warfare Training Center (MWTC) at Pickel Meadow. Another great place to train.
No Grid, no Cell service, no WiFi, no Interwebs, no InstaGag, no Zoom, no Faceplant, no Smart Phone Zombies, no Twitter Twits (but lots of Tweets..), and no neighbors! A place to re-calibrate.
This FOB is about 8 miles from the nearest pavement, ideal for getting “lost”. I had to deploy the VS-17 Signal Panel so my late-arriving buddies could find me in here.
Clear skies, no rain, temps between 32 and 79, lots of high altitude sun. Stars galore, perfect for “Introduction to Celestial Navigation” training with your M2 Compass and WWV.
Above: The dashboard altimeter reads 7560 feet elevation. Dense conifer and aspen forest in here, alongside a perennial trout creek, er refrigerator. No RFI from anything.
My buddy’s son testing the waters – Wet Suit required! This was snow 3 klicks up the canyon, even in mid July; the Survival Cylinders were chillin’.
The setup was a hasty campsite with a fairly simple equipment deployment this time. An AN/TRC-77 HF CW field set, an AN/GRC-9 and AN/VRC-7 mounted in my old truck, plus an AN/PRC-127ef VHF handy talkie. (Available were mounted commercial HF and VHF radios for “liaison” back to the home HQ. if necessary) The TRC-77 is a great field set for extended Ops like this. http://www.n6cc.com/trc-77-hf-cw-transceiver
Above: I ran the Morse Code TRC-77 from its internal SLA batteries for 4 days without a need to recharge them but the little solar panel was At The Ready. I worked mostly 7050 kc CW and some on 3550 kc in the early evenings with the J-45 Knee Key. The antenna is the ever-reliable horizontal half wave 80/40 meter double-dipoles about 45 feet up in the trees.
The TRC-77 runs about 8 watts output, crystalled for 3550, 3560, 3985R, 7030, 7050, 7055 kc. With freq/time agility, the low “NVIS” dipole it’s reliably good for local and out to a few hundred miles to my other buddies. With the dipole about half wave up (and clear of this canyon) I can work the east coast fairly regularly from The Bush. A great Recon setup!
NVIS (Near Vertical Incidence Skywave) Ops was the intent: It worked well getting signal into/out of this deep canyon considering freqs and the time. 10.7 cm solar flux was barely 70 while here. Verticals/end-fed slant wires need not apply.
I also had the PRC-127ef Handy Talkie set up on our normal Simplex freq to coordinate local ops with my buddies, 3 of whom on this trip are now Hams. This radio is the third iteration (made by E.F. Johnson) of the basic AN/PRC-127.
We also utilized the great K6TUO linked repeater system for convoy ops as well as liaison back home to the HQ QTH where my YL was operating (from 115 miles away from the repeater). Thanks TCARES! https://tcares.net/We had good comms with her on 2 meters and also 75 meters SSB, testing “deep backup” commercial HF Ham gear during the trip.
This setup is an example of communications “PACE” planning for a “camping trip with comms”: The acronym representing Primary, Alternate, Contingency, Emergency communications channels.
In this case the TRC-77, GRC-9, VRC-7 and the PRC-127ef VHF Handy Talkie.
(VHF here would require moving out of this canyon to high ground for direct VHF FM simplex or repeater relay.) VHF as for an emergency helo MEDEVAC on the 156.075 MHz CALCOORD simplex freq in CA for example. The Marines at the MWTC Base Ops could also hear a Medevac call on 40.50 MHz FM if needed. Always have your Lat-Long / UTM-MGRS grid posted near the radio.
Andy & Alex: Your PRC-515 and PRC-47 sounded great up here on 75 meters. Solid comms both ways, even with low power.
Above: I checked into the West Coast Military Radio Collectors Group AM phone net on 3985 kc on Saturday evening at 0330Z. The AN/GRC-9 received good signal reports from the (8-9?) net members up and down California and Nevada.
It’s always great to hear the familiar voices/CW fists of friends rolling into a remote spot like this. Thanks for listening for this little peanut whistle. If you worked me during the Net, this was the setup on my end. Chain saw optional….
Tom: Your SCR-284 also sounded great up here. Probably my first GRC-9-to-SCR-284 QSO. Haul it up here next time!
Despite that brief camera flash, the phosphorescent panel markings helped me tune and operate this Korean War vintage set in the total darkness here. No moon. Just imagine: Freezing cold, bugles, Danger Close….
This GRC-9 is always reliable from up here on CW or AM, maybe due to close proximity to the Ionosphere. It is permanently mounted in the ’71 Bronco and powered by a homebrew transistorized HV power supply mounted under the passenger seat – no room in here for a DY-88 dynamotor supply. Using the T-17 carbon mic of course; the dipole coax had been patched in here from the TRC-77.
The Chow was great as usual! Meat & Potatoes. No avocado toast, no Starbucks ….
Well, we call this annual operation “The Pigout” for a reason.
We were well prepared for any UFO’s, EMP, BigFoot visits or stray Nd:YAG laser target designator beams.
Yet another miserable trip to the mountains away from all those viruses.
Red sky at night, Sailor’s delight.
Always great to get outside and exercise all this old military field gear in its natural element. NO SHELF QUEENS!
(After Action Reports from some prior years FTX’s:)
You Da Man! With all this Covid stuff and having to do field opps from the back yard you have set an example for us all. With Dayton, Gilbert and just about everything being canceled its good to see someone getting out and demonstrating that field radios belong in the field.
Hi Ray! Ha! Well we are supposed to be “social distancing” – Challenge Accepted. I just get outta town, and head up.
Might be a long winter of Hunkering Down ahead, so I am getting the Battery charged with some fresh air and field ops this summer and into the fall.
Don’t even need no virus to do that! We do try…
Cheers – Tim
Thanks for posting this Tim, nice to see the old Bronco out in commo mode once again.
Hi Mark – Thanks..Hopefully to encourage more field ops. We know they’re out there….
Thanks for stopping by!
How’s the PRC-74 project going? PM sent
HI Tim, the PRC-74 worked great and never failed, however it was sold and I purchased a PRC-70 to replace it and currently enjoying it.
OK Mark…PM sent…Tim
Nice AAR, Tim! Field Ops could give us all a break from lockdown. I do like the idea of Vintage Field Day also. At the museum in Alameda (closed) we have lots of equipments that could be devoted to the cause. 73 de Bart, K6VK ##
Hi Bart! Been awhile… I always thought VFD was a good idea and fun. Resonated with our age group I guess…but tough on the old backs..haha
I missed you the last time I was over at the CHRS museum, nice setup and LOTS of potential gear for a VFD …Looking forward to seeing the Mil Radio section.
Thanks for the visit – Maybe some 2 meter AM ops while the summer is still with us. I guess Mt Diablo is open now? HiHi
If I had know I would have worked you with my PRC-515
Hi Tom – Well voice contacts were all informal as usual – we just monitor the Net freq on no particular schedule over 4 days. Andy’s PRC-515 sounded good, 20 watts is plenty to make the distance. Seems like good radios..Collins? BTW, Thanks for that AM relay, seems everyone was hearing the GRC-9 except him at one point..hihi. Tim
Love this post. Love the Bronco even more. Both are inspiring. Thank you for sharing.
Hi Jason – Thanks! Was a fun Op, many more to follow…
Thanks for visiting & 73, Tim