[MRCA] Todays M&S Net

Sun Jan 12 12:41:48 EST 2020

Just for fun I tried to do every part of the GRC-106 installation exactly as prescribed. Including locating the correct antenna mounts, feed thru and power cables including the conduit that runs across the mutt’s deck. But one place that I deviated was to install a MX-7777 surge suppressor assembly in the tool compartment located next to the battery compartment. That’s connected to two studs in the battery compartment, one that connected to a 60A fuse and the two batteries and the second stud feeds the two cables to the GRC-106, the VRC-12 system on the passenger side of the mutt and an accessory feed that runs things like the URC-110 that comes along for VHF work.
The two batteries are also connected to a slave connector on the front of the mutt and most times I can connect a MEP-025 1.5 kW 28 volt generator via a fifty foot cable or like yesterday can also use the slave connector to connect a AC power supply that feeds the mutts electrical system. The mutt has an onboard 60A alternator but try to avoid running the engine whenever possible due to the fact that the engine leaks oil a lot.
The MX-7777 is a great box. First it gives you a concealed place in the tool compartment where you can disconnect all the DC to the radios via the front power switch the second and best thing is that they have some form of huge diode / MOV in it that can limit power below 30 volt regardless of what happens to the input. I played around with one on the bench and saw it conduct massive amounts of current to ground but not damage itself.
And if it did ever fail it has a “Battle Override” switch that can bypass its function.

Ray F/KA3EKH

________________________________
From: Mkdorney <mkdorney at aol.com>
Sent: Saturday, January 11, 2020 10:40 PM
To: J Mcvey
Cc: mrca at mailman.qth.net; MMRCG at groups.io; MICHAEL ST ANGELO; Ray Fantini
Subject: Re: [MRCA] Todays M&S Net

We had a GRC-106 on my M151A2 in Greece if the Jeep wasn’t running, we were supposed to shut down completely before starting the Jeep,then we could turn it back on. There was no restriction as far as transmitting if the 1/4 ton was running or we shut it down. We only had to shut down the GRC106 when the 1/4 ton was off and we were going to start it.

Mark D.
WW2RDO

“In matters of style, float with the current. In matters of Principle, stand like a rock. “.   -   Thomas Jefferson

Sent from my iPhone

On Jan 11, 2020, at 6:04 PM, J Mcvey via MRCA <mrca at mailman.qth.net<mailto:mrca at mailman.qth.net>> wrote:

Can you start  the jeep after transmitting or do you leave it running?
On Saturday, January 11, 2020, 3:38:43 PM EST, Ray Fantini <rafantini at salisbury.edu<mailto:rafantini at salisbury.edu>> wrote:

thought I had a recent picture of the mutt in the yard but just checked the phone and no joy! did not take one this afternoon but do have plenty pictures of the mutt in field operations on my web page at:

http://staff.salisbury.edu/~rafantini/

recent pictures from Gilbert MRCA and York MVPA about half the way down the page.

Ray F/KA3EKH

________________________________
From: MICHAEL ST ANGELO <mstangelo at comcast.net<mailto:mstangelo at comcast.net>>
Sent: Saturday, January 11, 2020 2:28 PM
To: Ray Fantini; mrca at mailman.qth.net<mailto:mrca at mailman.qth.net>; MMRCG at groups.io<mailto:MMRCG at groups.io>
Subject: Re: [MRCA] Todays M&S Net

Ray,

Glad to hear you. I am normally the southernmost station in Leonardo NJ but  your Salisbury signal was coming in loud.

Would you have a picture of your setup? The wife was in the shack at the time and would like to see it.

73 Mike N2MS
On January 11, 2020 at 2:16 PM Ray Fantini <RAFANTINI at salisbury.edu<mailto:RAFANTINI at salisbury.edu>> wrote:

was great to drag out the mutt (M-151) and fire up the GRC-106 and make the net this afternoon. Its seventy degrees and sunny, nothing like you would expect for January!Was on the MMRCG net at ten this morning after getting out of bed ten of ten. Had I known the weather would have been like this would have attempted to get up early  and run the radio in the mutt for that net too.

Field radios are happy in the field! Not on the shelf or basement.

Ray F/KA3EKH

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