[Milsurplus] Milsurplus Digest, Vol 172, Issue 72

Sun Aug 26 11:01:43 EDT 2018

When I was working at Hughes Aircraft in the late 70s I lived in Venice CA. I stumbled across a shop on Venice Blvd that was in the process of closing for good. They had a big pile of ARR 41s, all appeared complete but none better than fair condition. Pretty beat up cosmetically. $75 each. I passed waiting to find a better value. Sigh. 

I saw an ARR 41 installed aboard a Wille Victor WV2 Navy Super Connie at the Chanute AFB Museum (sadly now closed with many planes scrapped). As I recal, it was paired with a 618T variant not an ARC 38. 

AF6IM

> On Aug 25, 2018, at 10:52 PM, milsurplus-request at mailman.qth.net wrote:
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> Today's Topics:
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>   1. Re: R648/ARR41 serial number 573 (Meir Ben-Dror WF2U)
>   2. Re: Checking out a '51 Hoffman (Hubert Miller)
>   3. Re: R648/ARR41 serial number 573 (Mike Morrow)
> 
> 
> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Sat, 25 Aug 2018 22:45:16 -0400
> From: Meir Ben-Dror WF2U <wf2u at ws19ops.com>
> To: Robert Meadows <rpmeadow at bellsouth.net>
> Cc: Milsurplus <milsurplus at mailman.qth.net>
> Subject: Re: [Milsurplus] R648/ARR41 serial number 573
> Message-ID: <mailman.20044.1535262750.9989.milsurplus at mailman.qth.net>
> Content-Type: text/plain; charset="utf-8"
> 
> Bob, 
> 
> Sorry but the panel is from a P3A. The communications equipment related circuit breakers are labeled Antenna Reel RL-428, ICS (intercom) AIC-5B, A section is marked ?Communications RCVR-XMTR?, it includes circuit breakers marked ARR-41, ARC-38, ARC-27A, and ?VHF RCVR ? XMTR? with no other nomenclature; Teletypewriter, and another separate section ?ARC-94? with 3 AC circuits and one DC circuit. Another 2 circuit breakers for DC are labeled ARN-14. The rest of the circuit breakers are for various lights, fuel gauges, fuel pump power, and equipment outlets.
> 
> The aircraft may have been in the process of upgrading, and the equipment was a mix of old and new.
> 
> I can email you the photo of the panel if you?d like.
> 
> 73, Meir WF2U
> Landrum, SC
> 
> Sent from Mail for Windows 10
> 
> From: Robert Meadows
> Sent: Saturday, August 25, 2018 6:56 PM
> To: 'Meir Ben-Dror WF2U'
> Subject: RE: [Milsurplus] R648/ARR41 serial number 573
> 
> The P3 never never used ARC 38, the HF suite was an ARR41 and a pair of ARC 94 which is Collins 618T.
> 
> I can provide you with a pair of handles for $550, with unknown condition radio attached.
> Bob
> 
> From: milsurplus-bounces at mailman.qth.net [mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of Meir Ben-Dror WF2U
> Sent: Saturday, August 25, 2018 4:58 PM
> To: Mike Morrow
> Cc: milsurplus at mailman.qth.net
> Subject: Re: [Milsurplus] R648/ARR41 serial number 573
> 
> I have an R-648 which came to me with the panel handles broken, off (bad packaging) ?but otherwise in OK condition. The previous owner hammified it by building an AC supply inside it on the dynamotor plate. I managed to find a dynamotor, without the plate, so I?m going to get rid of the AC supply components and mount the dynamotor on the plate. I have a suspicion (haven?t measured voltages yet, but the radio is working) that the filament chains were modified from the 24 V configuration to either 12 or even 6 volts. I?ll need to restore the filament wiring. Luckily, the radio came with the power connector intact (one of the favorite hacking jobs is to remove them), just a few wires unsoldered from it, but the original wires are there tied off. The AC cable is connected via the correct plug, I guess the wires are disconnected to accommodate the AC operation without discarding the 24 V runs, which is good as far as restoration goes. I wish I could find a pair of handles ? I know
>  Fair Radio used to have R-648 carcasses but they told me that even these were stripped and they don?t have handles. I managed to find a mount, so the end product when I?m done with the restoration, will look good ? disregarding the lack of handles?
> I now also have a decent looking original ARC-38 (non-A!), with the control box, power supply on the mount, and mount for the ARC-38. The mount in fact is not original, it?s for some other ? unknown piece of avionics, but the width and the locking mechanism fit the ARC-38. A local ham friend, who has a nicely equipped machine shop in the hangar attached to his house (he built his aircraft) simply extended the mount to the ARC-38 length using aircraft grade stock, and riveted the thing together with the flat aircraft rivets, so the mount looks completely factory built. I also have the connector that plugs in to the back of the ARC-38.
> To top all this and have a nice ARC-38/ARR-41 setup, I found a P-3A radio compartment electrical distribution/circuit breaker panel, with the ARC-38 and ARR-41 nicely marked by their circuit breakers. That?s where I?m going to feed the 28 VDC to the radios!
> 
> Anyway, it?d be nice to find the handles for the receiver, because I don?t know whether I?d be able to fabricate them to look original.
> 
> 73, Meir WF2U
> Landrum, SC
> 
> 
> Sent from Mail for Windows 10
> 
> From: Mike Morrow
> Sent: Saturday, August 25, 2018 10:18 AM
> Cc: milsurplus at mailman.qth.net
> Subject: Re: [Milsurplus] R648/ARR41 serial number 573
> 
> There likely were AN/ARC-38A and AN/ARC-94 Collins HF sets on that P-3A. ?The AN/ARR-41 was the aux receiver for the AN/ARC-38 and -38A.
> 
> I've got a couple of AN/ARR-41 sets in working condition, and one that's not. ?Twenty years ago they were pretty common, but not the mounts.
> 
> Mike / KK5F
> 
> 
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> ------------------------------
> 
> Message: 2
> Date: Sun, 26 Aug 2018 04:19:25 +0000
> From: Hubert Miller <Kargo_cult at msn.com>
> To: "milsurplus at mailman.qth.net" <milsurplus at mailman.qth.net>
> Subject: Re: [Milsurplus] Checking out a '51 Hoffman
> Message-ID:
>    <CY1PR14MB0347E16F7D3EE5501F8808A4E4340 at CY1PR14MB0347.namprd14.prod.outlook.com>
>    
> Content-Type: text/plain; charset="iso-8859-1"
> 
> Robert, you are correct about Avco cases having the sharper corners. I know this firsthand because back when Fair Radio was selling GRC-9s for $50
> ( imagine that ), I bought one and paid them an extra $5 for one with "squared off corners" as special selection. 
> Unfortunately I think this is the one I found in my storage with no grills. 
> So I am looking to buy receiver and transmitter grills for the GRC-9. 
> 
> Whether the Hoffman with the squared corners has an Avco rebuild cabinet, I don't recall; I think I would have noticed this when I looked at it, but 
> I'll take another look. Maybe I'll even shoot a photo of the antenna inductor knob and lock and the dial window. 
> Among about 12 GRC-9s I have owned, this is the only Hoffman I have seen.
> -Hue
> 
>> From: Robert Downs <wa5cab at cs.com> 
> Subject: RE: [Milsurplus] Checking out a '51 Hoffman
> 
> Sounds like you may have come across one of the Depot replacement cases and CW-109 Covers.? These were made I think in either the late 1050's or early 1960's.? The radios installed in them will retain their original nameplates.? These cases (and they may have been made by Hoffman but I was thinking it was Avco) do have sharper corners and unlike the originals are smooth on the outside instead of having reinforcing channels stamped into them like all of the BC-1306's and the original RT-77 and RT-77A cases and covers did.
> 
> Robert Downs
> 
> 
> ------------------------------
> 
> Message: 3
> Date: Sun, 26 Aug 2018 01:52:19 -0400 (EDT)
> From: Mike Morrow <kk5f at earthlink.net>
> To: Meir Ben-Dror WF2U <wf2u at ws19ops.com>,    Robert Meadows
>    <rpmeadow at bellsouth.net>
> Cc: Milsurplus <milsurplus at mailman.qth.net>
> Subject: Re: [Milsurplus] R648/ARR41 serial number 573
> Message-ID:
>    <1335433227.7496.1535262739608 at wamui-koala.atl.sa.earthlink.net>
> Content-Type: text/plain; charset=UTF-8
> 
>> The P3 never never used ARC 38
> 
> That's not at all likely to be true for ANY aircraft that had an AN/ARR-41.  I know of no case where an AN/ARR-41 would be purchased and installed with two AN/ARC-94 sets in an all-original installation.  But the AN/ARC-38 or -38A that originally accompanied the AN/ARR-41 could certainly have been later replaced by another AN/ARC-94, leaving the AN/ARR-41 in place.
> 
> Bottom line:  If an aircraft had an AN/ARR-41, it once had an AN/ARC-38 or -38A.
> 
>> ...the HF suite was an ARR41 and a pair of ARC 94 which is
>> Collins 618T.
> 
> What?  No dashes?
> 
> More precisely, the AN/ARC-94 is a 618T-2 set that requires external 400 Hz AC power plus 28 vdc.  The AN/ARC-102 (most popular with the Army) is a 618T-3 set that requires only 28 vdc power because its PP-3702/ARC-102 mounting rack has an inverter for generating the required 400 Hz AC control voltage.
> 
> BTW, a serial number on that R-648/ARR-41 is meaningless without the associated order number on the name plate.
> 
> I never paid more than $100 for any of my three R-648 receivers, but the last I bought was 15 years ago.
> 
> Mike / KK5F
> 
> 
> ------------------------------
> 
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> End of Milsurplus Digest, Vol 172, Issue 72
> *******************************************