[MRCA] My COL-52286 (T-47/ART-13) For Sale.

[Nick England]

The MIL-S-901 heavyweight test, also known as the barge test, is perhaps
the most well-known test in MIL-S-901, mainly because it involves setting
off explosive charges near a standard or large floating shock platform
(FSP) that houses the item or equipment being tested.

According to the MIL-S-901 heavyweight test schedule, a 60-pound explosive
charge is detonated at a depth of 24 feet below the water’s surface for the
standard FSP test, while a 300-lb charge is detonated at 20 feet below the
water's surface for the large FSP test.

Video
https://m.youtube.com/watch?v=kE3k2yerjos&feature=emb_logo



On Tue, Aug 30, 2022 at 4:42 PM Michael Hanz <aaf-radio-1 at aafradio.org>
wrote:

> I'm no expert on anything, but I'm under the impression that the radio
> equipment I've seen installed in naval combatants has some pretty hefty
> shock mounts to improve survival through torpedo and enemy naval cannon
> hits on a ship, not to mention firing of the ship's own large weapons.  I
> seem to recall that even the 5" guns hit you like a plank on board.  The
> ringing pulse of a hit throughout the steel structure is apparently pretty
> big, and those ATC and ART-13 transmitters have some fairly sensitive inner
> parts.
>
> There are some folks on MRCA who can interject some better facts than my
> meager impressions.
> KC4TOS
>
> On 8/30/2022 3:23 PM, Jeep Platt wrote:
>
> Mike is, of course correct.  The TCZ nomenclature is strictly Navy.  I can
> only imagine that they may have been shipboard, or maybe shore stations at
> NAS facilities.  Yet, the only place I've seen them were at 3 different
> MARS stations.  All gleaned from DOD R&M and such, I assume.  I tried to
> use a TCZ mount kit on a shoeless ART-13 but guess I was missing
> something....  Ted, W3PWW had all the poop on the TCZ... but....
> K3HVG
>
> ------------------------------
> *From:* Michael Hanz <aaf-radio-1 at aafradio.org> <aaf-radio-1 at aafradio.org>
> *Sent:* Tuesday, August 30, 2022 1:01:54 PM
> *To:* Jeep Platt <jeepcomms at outlook.com> <jeepcomms at outlook.com>;
> wildbillk0ikp (null) <wildbillk0ikp at aol.com> <wildbillk0ikp at aol.com>;
> Doran Platt <jeepp at comcast.net> <jeepp at comcast.net>
> *Cc:* William W. Busch via MRCA <mrca at mailman.qth.net>
> <mrca at mailman.qth.net>
> *Subject:* Re: [MRCA] My COL-52286 (T-47/ART-13) For Sale.
>
> In addition to Jeep's description, I don't know of anywhere in the Signal
> Corps inventory that the TCZ was used.  It had that salt water Navy aroma,
> don'cha know. (running and ducking...)
>
> In order for it to be used in an aircraft or ground vehicle it would have
> needed another pair of support plates underneath with appropriate rubber
> shock absorbers.  You can see the two ART-13 transmitters in the Enola Gay
> (one connected to the "liaison" antenna, the other to the "command"
> antenna) at
> https://aafradio.org/NASM/Enola_Avionics_Descriptions_-_Radio_Op.htm
> (showing that both have the standard MT-284/ART-13 shock mount with
> rubber pads separating the three levels of the mount.)  A better closeup of
> the MT-284 mount construction is at the top of
> https://aafradio.org/garajmahal/ART-13_mounts.html
>
> - Mike  KC4TOS
>
> On 8/30/2022 10:25 AM, Jeep Platt wrote:
>
> The TCZ was simply a ground mounted T-47. It sat on a 44" (nom) cabinet
> with an a.c. power supply. The mount was designed to support the
> transmitter in a fixed environment.  I saw several in USAF MARS
> stations...back when....
> K3HVG
>
> ------------------------------
> *From:* mrca-bounces at mailman.qth.net <mrca-bounces at mailman.qth.net>
> <mrca-bounces at mailman.qth.net> on behalf of wildbillk0ikp (null) via MRCA
> <mrca at mailman.qth.net> <mrca at mailman.qth.net>
> *Sent:* Tuesday, August 30, 2022 9:48:01 AM
> *To:* Doran Platt <jeepp at comcast.net> <jeepp at comcast.net>
>
> Hi Jeep,  educate me.  What was a TCZ mount for?  We know the army used it
> in the Enola Gay.  Did they use it in vehicles installations?
> Thanks, 73 Wild Bill, K0IKP
>
> On Aug 30, 2022, at 06:08, Doran Platt <jeepp at comcast.net>
> <jeepp at comcast.net> wrote:
>
> Looks like the TCZ mount vice the aircraft shockmount version. Very nice
> unit!!
> K3HVG
>
>
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-- 
Nick England K4NYW
www.navy-radio.com
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