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Early Straight

PostPosted: February 7th, 2018, 10:59 pm
by Surveyor
From a purist standpoint, what date or time frame would all of the original straights been finally taken out of service? Trying to confirm that an an/vrc-53 would have been a reasonable possibility. I see a vrc-12 in Nam on one in Doyle's book so I would assume a 53 would not be a stretch.

If a 53 is feasible, what would be the correct antenna and mount be for early?

Re: Early Straight

PostPosted: February 8th, 2018, 10:25 am
by rickf
Well this is where purist and realist may vary. In a wartime scenario like Vietnam you used the vehicle till it was used up and then you used it some more until it stopped moving. It was possible that a straight could have been in service all the way through the conflict if it was real lucky. That is not likely but I would bet there were a fair number of them still running around in the late 60's. That radio fit in the 1029 mount so it could go into any available vehicle with a mount. Probably not the answer you are looking for but yes, I would say it was entirely possible.

Re: Early Straight

PostPosted: February 8th, 2018, 1:45 pm
by Surveyor
Thanks Rick. Curious though as to antenna and mount. I could be wrong but the picture in Doyle's does not appear to be sugar scoop setup. Was there an earlier mount and antenna used for the vrc-12 series?

NM - I think I found my answer here ... http://g503.com/forums/viewtopic.php?f=14&t=35460

Anybody have a good picture of this type of setup they could share? Thanks.

Post
by muttguru@aol.com ยป Tue Jan 04, 2005 8:01 am
Dear Listers,

Here's some information that you may find useful if you plan to add a radio to your early mutt and want to ensure that the antenna setup is configured to a correct age-related spec.

From 1960 through to mid-1966, the AN/VRC-12 series of radios used the much-discussed "Box-Base" antenna. You've seen the photos, now hear the components (-:

The box-base antenna setup was designated as the AT-912, NSN 5820-897-6357 and the appropriate tech manual covering the components was TM11-5820-402-20P

The setup consisted of :-

Matching Unit MX-2799/VRC (the actual box-base), NSN 5820-897-6356
Antenna Support Base AB-719/VRC, NSN 5820-856-2729 (this is the springy bit)
Antenna Whip (Lower) AT-1096/VRC, NSN 5820-856-2730
Antenna Whip (Upper) AT-1095/VRC, NSN 5820-856-2728
Reflector Plate SC-C-48637, NSN 5820-00-875-0905 (seldom used).

The upper part of the whip is the same as that used on the MX-6707/VRC unit (the most recent type of spring-base, also known as the AS-1729/VRC-series antenna), however, the lower whip is NOT interchangeable with the one used on the MX-6707/VRC because the threads are different. Needless to say, if you have the AT-1096 lower whip, you have an increasingly hard-to-find item.

If you haven't nodded off by now, you may also like to know that the first mention of the pending introduction of the MX-6707/VRC type antenna (and the phasing out of the box-base setup) was in August 1966.

Yet another service provided by Ken's Insomnia Cures

Re: Early Straight

PostPosted: February 8th, 2018, 3:18 pm
by rickf
there was an early antennae matching unit and it was a rectangular box. I doubt they would still be using that later on though. They would be using the 1729 antennae and the 6707 matching unit. Then again, I am not a radio guy.

Re: Early Straight

PostPosted: February 21st, 2018, 3:56 pm
by Surveyor
Make that a an/vrc-64. Doubt anyone will care about 53/64 round here. Here is the latest acquisition - working for less than $300 but of course the shipping was a *&^%&. Adding Tech license to the other 1000 things I need to do to/acquire for this m151.

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Re: Early Straight

PostPosted: February 22nd, 2018, 1:02 am
by m75
Great find for the price.

Re: Early Straight

PostPosted: April 5th, 2018, 11:12 pm
by Surveyor
Update - passed the Tech exam tonight with no problem. :D

Didn't study at all for the General but they talked me into trying anyway. Took an edjumicated guess on half the general questions but missed passing it by one. sigh. :(

Re: Early Straight

PostPosted: April 6th, 2018, 9:30 am
by rickf
Since they talked you into taking the test and the fact that there are fewer and fewer HAM's out there they should have let you slide on the one missed!

Re: Early Straight

PostPosted: April 6th, 2018, 1:20 pm
by Surveyor
No worries. The tech covers what I plan on doing for now.

Re: Early Straight

PostPosted: June 11th, 2018, 11:55 am
by Surveyor
One step closer to running a dual antenna setup. Picked up an angry5 yesterday. Makeshift coax antenna and I could only pick up a couple channels in the morning but it really opened up last night. Radio Havana Cuba, tons of Spanish language stations, oldies playing out of Florida, Japanese language station, and I'm pretty sure a Vietnamese station. Asian language interspersed with French throughout the broadcast.

I had found US Army picture of one mounted on a back fender of an early m151 months back but I'll be danged if I can find it now. Edi t -found it, third pic down appears to be one mounted on driver side with early corner bracket on driver on i think an a1. Can't tell what bracket is on pass side.

https://translate.google.com/translate? ... 3Ft%3D4749

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