Well,

Having been engaged to rework a set of “ARC 5” receivers, covering from 190Kc through 9..Mc, and getting into the work, noticed that a few of the radios were actually ARA, so, another set of manuals located and printed.  If memory is correct, the USN ARC-5 and ARA were interchangeable at the RACK, but, internally a bit different.  USN, again with memory didn’t “Standardize” the ARC-5 until late 50’s early 60’s.

At least that is what the manuals show.

As for transmitters, the BC and ARC series are a bit different, and then there are other differences mostly concerning the Modulators.

 

As for issue quantities, that seems a supply issue, not an installation issue.

Robert

W4RRD

 

 

From: [email protected] <[email protected]> On Behalf Of Mike Morrow
Sent: Friday, November 17, 2023 12:11 AM
To: [email protected]
Subject: Re: [ARC5] T18 - in eBay

 

The AN/ARC-5 was a USN command set that appeared in 1943 to replace in new aircraft the original 1940 ARA/ATA command set.  It was not used in USAAF aircraft such as a B-24, but could be found naturally in the USN's PB4Y.  The AN/ARC-5 Maintenance handbook suggests that the T-18/ARC-5 was issued one for every five of most aircraft, while the T-19 through T-23/ARC-5 were issued one for every aircraft.

 

The USAAF had little use for a command transmitter operating from 2.1 to 3.0 MHz so its SCR-274-N never included a transmitter for that range, just as it never adopted an associated receiver for 1.5 to 3.0 MHz.  Only the USN used on a limited basis that range of command set frequencies.

 

The ebay T-18 is rough and missing cover screws.  It likely was in NOS condition when the ham hacker got hands on it.  Not as many T-18s were installed for naval service as were the other transmitters. (I ignore the rare T-15 to T-17 units.)

 

Mike / KK5F

-----Original Message-----
From: J Mcvey <[email protected]>
Sent: Nov 16, 2023 8:09 PM

 

Two big problems with that T18

1) Condition

2) desirability

 

If you are restoring a B-24 and want that transmitter, I suppose it might be worth $50 USD

Otherwise , you can't put it on the air and it doesn't even look good on the shelf.

 

On Thursday, November 16, 2023 at 08:27:25 PM EST, Bill Blodgett <[email protected]> wrote:

 

Approx. how much should one bring in that condition today ?

 

On Nov 16, 2023, at 6:54 PM, J Mcvey via ARC5 <[email protected]> wrote:

 

That's way too much money .

 

On Thu, Nov 16, 2023 at 7:13 PM, Leslie Smith

 

I know nothing about this item.

Except s-nr in photo is 1763.

Hope someone can 'rescue' it.

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