[ARC5] 1155

[Geoff]

----- Original Message ----- 
From: "Mike Morrow" <kk5f at earthlink.net>
To: <arc5 at mailman.qth.net>
Sent: Saturday, July 07, 2012 11:38 PM
Subject: Re: [ARC5] 1155


>
>> Neither was the US involved then except to ferry food, etc. The 
>> BC-375/ARC-5
>> TX/BC-348 was aboard when our bombers arrived in mid to late 1942..
>
> There were never *any* AN/ARC-5 sets aboard those bombers.  There were
> SCR-274-N sets, and those are rather different from the USN AN/ARC-5.
> This is NOT a minor point.

I consider it a very minor point and lump the black wrinkle and plain 
aluminum boxes into one ARC-5 basket for the sake of discussion of command 
or long range applications.

>
>> The ATC was available before that and the ART-13 in 1943 in later B-17's
>> when we got serious about production after working the bugs out.
>
> I'd be interested in your source that documents the presence of the
> USN's ATC anywhere in 1942.  I've never seen any manuals dated before
> 1944.  The design was out, but has anyone any dated pictures that
> show an ATC installation in 1943 or earlier?

All Ive been able to find is that the ATC contract was let in 1940 and  by 
1942 Collins was also building the T-47/ART-13 for the Navy.
Mine is a Collins built ATC designated COL-52286 (the actual transmitter 
part # as part of the ATC system) with a Nobsr 73238 contract.

Since it predates the JAN designation I will assume it was also in service 
before then.

The first USAAF version was later (late 1942 according to several sources) 
and designated the T-47A/ART-13 which later was changed in the paperwork and 
equipment tags to the ART-13A.

As with lots of miltary and civilian gear the early manuals are particularly 
hard to find since later ones superceded them and the old ones were tossed 
as they received depot or tender level service.
I have several communications receivers built in 1945 to very early 46 that 
are quite different from the manuals Ive been able to locate.

The same for the first run RBB and RBC which are quite different in some 
areas.


>
> Regardless, the ATC/ATC-1 was not used by the USAAF.


Nobody said it was...officially.


 I've never seen
> any documentation for the USAAF's AN/ART-13A in any B-17, -24, etc.  It
> doesn't seem to show up until the B-29 shows up in the PTO, late in WWII.


All the real or realistic B-17 photos and other docs Ive seen show a BC-348 
and BC-375 for liasion and a pair of SCR-247 transmitters and 3 transmitters 
used for Command. There was also a radio compass receiver, marker-beacon 
receiver and frequency meter. The BC-375 was also used in early B-29's, Was 
the ART-13 retrofitted into some B-17's....I dont know but what was done on 
the ground is often not in books and manuals.

Instructions on how to substitute various pieces due to failure are also 
given......such as using a liason TX in a command function.

The SCR-522 was a later addition with a range of 80 miles at 5000' down to 
30 miles at 1000' so it was rather useless for those conditions in a single 
plane well away from its squadron.

>
> Mike / KK5F
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