Digging through the DTIC database, I found one of the benchmarking documents for the RAS. It's labeled "XRAS" since it was still experimental at the time and appears to fail in a lot of Navy benchmarking requirements. It's interesting to note that this is what caused the eventually approved RAS to use of the 6V6G and 6F8G tubes compared to other HROs. Enjoy reading: 

https://apps.dtic.mil/sti/trecms/pdf/AD1158726.pdf

On Mon, Oct 16, 2023 at 4:47 PM Jim Whartenby via Milsurplus <milsurplus@mailman.qth.net> wrote:
I believe coaxial cable was invented some 50 years earlier (1880) by Oliver Heaviside who also held the original patent.  His biography is worth a look, talk about being ahead of your time!
Jim

Logic: Method used to arrive at the wrong conclusion, with confidence.  Murphy


On Monday, October 16, 2023 at 03:38:17 PM CDT, howard holden <holden7471@msn.com> wrote:


Very specifically, submarines used coax cables. Don’t recall other ships using, but I can’t imagine why not. Coax was invented in 1929 I think.

 

Howie WB2AWQ

 

Sent from Mail for Windows

 

From: Hubert Miller
Sent: Monday, October 16, 2023 1:27 PM
To: milsurplus@mailman
Subject: Re: [Milsurplus] [MMRCG] Refurbed (?) U.S. Navy RAS Receiver

 

I don't think any WWII era ship used coax for HF.
Or, what am i missing?
So is there a coax - single wire conversion needed?
-Hue Miller
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