[MRCA] MRCA Digest, Vol 155, Issue 13

Charles Agosti cagosti at statesystems.com
Mon Mar 27 10:05:13 EDT 2017 

A lot of GRC106 equipped M151 had a small trailer with a 24vdc3 kw
Gen set and extra gas and a long slave cable to the jeep they also carried
Dipoles, lots of coax, mast kits, ground rods,tools  Ect in the trailer

On My M151A2 Grc 106 install I am using Milspec 6TL I think 
Original equipment batteries and I have to run at above idle 
Anytime I transmit 

CHARLES AGOSTI
STATE SYSTEMS RADIO INC.
269-349-1935
cell 217-4188

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Subject: MRCA Digest, Vol 155, Issue 13

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Today's Topics:

   1. Re: Todays M&S Net AAR (Ray Fantini)
   2. Re: Todays M&S Net AAR (JEFF CICCONE)
   3. Re: Todays M&S Net AAR (Radio Station KW1I)


----------------------------------------------------------------------

Message: 1
Date: Sun, 26 Mar 2017 18:13:28 +0000
From: Ray Fantini <RAFANTINI at salisbury.edu>
To: Peter Gottlieb <kb2vtl at gmail.com>, "mrca at mailman.qth.net"
	<mrca at mailman.qth.net>
Subject: Re: [MRCA] Todays M&S Net AAR
Message-ID: <1490552033144.77840 at salisbury.edu>
Content-Type: text/plain; charset="Windows-1252"

The mutt has two 550 CCA batteries that are a little over two years old
wired in series. There is also a 60 ampere alternator driven by the engine
that replaced the stock 25 ampere generator.  The generator sucked because
it did not put out full current until the engine was running well above
idle, the alternator always pumps out lots of current regardless of engine
speed. 
With all the radios on in receive only the branch that feeds them is only
drawing a little over two and a half amps, with the VRC-12 in transmit that
draws maybe five amps more. With the GRC-106 in standby total current drain
is only around eight amps or so and in transmit or tune will be drawing
between twenty six to thirty two amps on the DC feed.
The two car batteries are rather small so they can fit into the battery
compartment and may be undersize but you don?t need much in the way of
batteries to turn over the little four cylinder engine in the mutt. 
The issue is do you need to keep the engine running for the entire time that
you plan on transmitting? Or with good batteries are they well within the
capacity of the batteries so you only need to run the engine only once every
couple hours? Yesterday I was able to have everything running for over two
hours just using the batteries but after that started to have issues. Anyone
have any idea what the original military spec was for operating the 106 in a
vehicle? If you were intended to keep the engine running the entire time you
were planning on transmitting or not?

Ray F/KA3EKH
________________________________________
From: MRCA <mrca-bounces at mailman.qth.net> on behalf of Peter Gottlieb
<kb2vtl at gmail.com>
Sent: Saturday, March 25, 2017 7:40 PM
To: mrca at mailman.qth.net
Subject: Re: [MRCA] Todays M&S Net AAR

Do you use the vehicle battery or a separate one?


On 3/25/2017 4:43 PM, Ray Fantini wrote:
>
> The goal was to take the M151A1 out of the garage, set up everything 
> and participates in the M&S Net at noon along with attempting other 
> QSO on different bands, also want to have everything ready for the 
> Aberdeen event in May.
>
> Resources:
>
> Used the M151 just recently put back together after removing the 
> engine and transmission to install all new seals and stop the never ending
oil leaks.
>
> The AN/GRC-106 HF Transceiver, VRC-12 FM transceiver with vehicle 
> mounted antennas were used in addition used the twenty four foot push 
> up mast with an inverted V antenna cut for 5357 The on board antenna 
> would be used for all other bands.
>
> Operation:
>
> Got everything set up just before noon. M&S Net went with out issue. 
> No problems hearing or being heard by any participating stations. Did 
> announcement about QSY to 18.125 after net and did. Did hear traffic 
> at 18.14 and 18.132 or so, did try calling CQ couple times on 18.125 
> but discovered that after a short period of time I was not 
> transmitting. I discovered that when supply voltage drops too low the
transmitter will not work properly.
>
> Things learned:
>
> Wanted to see how long I was able to operate without running engine. 
> Did run the engine for fifteen minutes prior to beginning of M&S Net 
> but not after that. By the time I started trying to work on seventeen 
> meters battery voltage indicator was in yellow and now know that 
> voltage indicator needs to be in green for proper transmission. The 
> receiver works fine but the transmitter will not tune in low voltage 
> condition. Next time need to run the engine more often or add external 
> generator to mutt. Had the VRC-12 in operation entire time and was
occasionally keying to see what effect that had on battery life.
> Where GRC-106 wont tune but still receive the VRC-12 still worked but 
> at reduced power.
>
> May look into MEP-015 28 Volt Generator being I know where I can 
> locate one that I can swap for my MEP-015 AC generatorand run all the 
> DC stuff on the mutt from that located away from the mutt.
>
> Also noticed that there is lots of activity up on seventeen meters, 
> perhaps a additional cut V can be prepared for that band. Also need to 
> investigate getting RT-834 to replace my RT-662 being looks like if 
> going to do anything on seventeen you need the pack R/T channel that?s 
> at 18.157.5
>
>
> Ray F/KA3EKH
>
>
>
>
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------------------------------

Message: 2
Date: Sun, 26 Mar 2017 22:01:45 -0400 (EDT)
From: JEFF CICCONE <kg2bz at comcast.net>
To: Ray Fantini <RAFANTINI at salisbury.edu>, Peter Gottlieb
	<kb2vtl at gmail.com>, 	mrca at mailman.qth.net
Subject: Re: [MRCA] Todays M&S Net AAR
Message-ID: <530056707.417747.1490580105416 at connect.xfinity.com>
Content-Type: text/plain; charset=UTF-8

ray
the military 2hn batteries were only about 45 amphrs.  somewhere in the -10
manual i believe the vehicle had to be running .  ideally if you could get
one of the 3kw 100a 28v generators that would be ideal. colemans used to
have a lot of them.

jeff


------------------------------

Message: 3
Date: Sun, 26 Mar 2017 22:44:35 -0400
From: "Radio Station KW1I" <kw1i at earthlink.net>
To: "JEFF CICCONE" <kg2bz at comcast.net>,	"Ray Fantini"
	<RAFANTINI at salisbury.edu>,	"Peter Gottlieb" <kb2vtl at gmail.com>,
	<mrca at mailman.qth.net>
Subject: Re: [MRCA] Todays M&S Net AAR
Message-ID: <B3BE5C78FF5C49D69996B972D02FE1B7 at HomeOffice>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
	reply-type=original

Ray,

I replaced the 25 A generator in my M38A1 with a 50 A alternator and I still
have to keep the revs up to transmit on the GRC-19.

Dale

-----Original Message-----
From: JEFF CICCONE
Sent: Sunday, March 26, 2017 10:01 PM
To: Ray Fantini ; Peter Gottlieb ; mrca at mailman.qth.net
Subject: Re: [MRCA] Todays M&S Net AAR

ray
the military 2hn batteries were only about 45 amphrs.  somewhere in the -10
manual i believe the vehicle had to be running .  ideally if you could get
one of the 3kw 100a 28v generators that would be ideal. colemans used to
have a lot of them.

jeff
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------------------------------

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