Page 1 of 1

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 ...

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

by 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.


Re: Early Straight

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