[Milsurplus] [MMRCG] Refurbed (?) U.S. Navy RAS Receiver

Sun Oct 15 15:01:32 EDT 2023

RAB was one of the first super-heterodyne out there and a great example of what the newer technology as compared to TRF had to offer, but when the HRO, not as much the RAS but the regular HRO rolled out look what it had to offer, not only a super het but also crystal filter in the IF and a working AVC system that used tubes built around the idea of applied AVC.

The RAS was somewhat like a HRO jr. without filter or S meter but there was the very mysterious Noise Limiter modification kit where you removed the detector AVC tube and stuffed that small assembly in the radio and it eliminated all the problems that the radio had with lightning burst and other high impulse noise. The mysterious thing is that no one can adequately explain how it works!

Ray F/KA3EKH
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From: MMRCG at groups.io <MMRCG at groups.io> on behalf of Jim Whartenby via groups.io <old_radio=aol.com at groups.io>
Sent: Sunday, October 15, 2023 2:42 PM
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Cc: milsurplus at mailman <milsurplus at mailman.qth.net>
Subject: Re: [Milsurplus] [MMRCG] Refurbed (?) U.S. Navy RAS Receiver

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I'm sure that the RAS is a find receiver but what about the 1931 RAB?  See: https://skywaves.ar88.net/commrx/RCA/RAB/RAB.html
455 pounds puts it in a class of it's own!  <grin>
Regards,
Jim

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

On Sunday, October 15, 2023 at 12:43:31 PM CDT, Ray Fantini <rafantini at salisbury.edu> wrote:

Don’t intend to start any trouble, if you’re happy with that paint scheme cool. But all the old prewar and everything up to the HRO-5T were black from the factory.  My power supply (CAN-20090) came with a AC power switch in the same location although it’s sideways and has a small brass plate for ON and OFF, also I have never seen a HRO without knob skirts, the later series National radios came without skirts. My CAN-49105 speaker panel has the square magnet and the National plate to coil transformer mounted to the back.

It’s a great radio for its age; remember reading about how several were used at the Navy radio intercept station in the Philippines before it fell in the first months of the war. Several were also in use on the Lexington that was lost at the battle of the Coral Sea .

It’s a revolutionary radio for when it was introduced in 1935 that exceeded anything on the market but ten or fifteen years later would think it would not be in high enough demand for a retrofit. Not to take away from the fact that in 1940 it was in high demand for British Y-Service stations intercept work, the HR0-5M and so appreciated by the Nazis that they produced an almost identical copy, the KST.

But then again, the government, Navy included, has done lots of other questionable things.

So, I cannot confirm my speculations.

Ray F/KA3EKH

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From: MMRCG at groups.io <MMRCG at groups.io> on behalf of Nick K4NYW via groups.io <navy.radio=gmail.com at groups.io>

Sent: Sunday, October 15, 2023 1:15 PM
To: David Stinson <arc5 at ix.netcom.com>
Cc: MMRCG <MMRCG at groups.io>; milsurplus at mailman <milsurplus at mailman.qth.net>
Subject: Re: [MMRCG] Refurbed (?) U.S. Navy RAS Receiver

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Well I was just taking another look at Dave's photos before adding them to my "puzzlers" page, when I noticed the non-navy serial number on the RAS-5 tag. I'll bet two inflated dollars vs a non-inflated donut that Bob Peters K1JNN (SK) and Glen Zook K9STH (SK) are responsible for this particular RAS-5

https://puck.nether.net/pipermail/boatanchors/2001-July/009440.html
https://puck.nether.net/pipermail/boatanchors/2001-September/009782.html

https://obituaries.bangordailynews.com/obituary/robert-peters-804492711
https://www.forevermissed.com/glen-earl-zook/about

Nick England K4NYW
www.navy-radio.com<http://www.navy-radio.com/>

On Sat, Oct 14, 2023 at 1:17 AM David Stinson <arc5 at ix.netcom.com<mailto:arc5 at ix.netcom.com>> wrote:
Recently acquired this complete RAS receiver rack.
I've seen and have WWII-era U.S. Navy receivers
which were originally black wrinkle with the old
paint stripped, repainted with gray-to-blue-gray
untextured paint and with (if they are in
good condition) their nomenclature plates remounted.
This one has been stripped and professionally repainted,
but all the tags have been replaced with laminated paper.
Photos:

https://photos.app.goo.gl/EaaKdEHbp8TjbB6q6
https://photos.app.goo.gl/FqvN2dHAGfp3RtUG6
https://photos.app.goo.gl/tVGmeKfBXzo7v8Nc8
https://photos.app.goo.gl/LQnWky5njWgtvKtE7

Anyone seen this before?  What do you think?

TNX OM ES 73 DE Dave AB5S

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