[ARC5] R-4/ARR-2 schematic?

[WA5CAB at cs.com]

Clare,

I've forgotten which of the seven or eight "conversion handbooks" had the 
schematic of the R-4/ARR-2 but it wasn't very well done and might have been 
shot down onto 8-1/2X11 (a few in that series weren't but most were).  And if 
it was scanned by the usual suspects it's probably illegible anyway.  High 
quality to that bunch means that they accurately copied all of the coffee 
stains, staple marks, browned tape repairing tears and the yellowed background 
of all of the pages.  Anyway, no old saying was ever truer than "If it's 
Free, it's probably worth what you paid for it" as applied to manuals.  
Perhaps followed by "If it's worth doing at all, it's worth doing right".

Anyway, NA 08-5Q-261 is the Handbook of Operating Instructions.  I could 
sell you a decent complete reprint for $16.10 plus postage, but although it 
does have seven foldouts, they are mostly cabling diagrams for the four radio 
sets covered.  No schematics.

The Handbook Maintenance Instructions on AN/ARR-2(*) (and AFAIK the final 
revision) is AN 16-30ARR2-2 dtd 10/01/45 rev 05/01/54.  176 pages plus 52 
11X17 foldouts.  I could sell you a complete reprint of that as well for $48.70 
plus shipping but I doubt that your project has that high a priority.  :-)  
If you will confirm whether the receiver you are actually trying to save is 
an R-4/ARR-2 or an R-4A/ARR-2 (I assume that it is not an R-3/ARR-2X or 
R-3A/ARR-2X) I'll email you a decent PDF of the correct schematic.

I would suspect, although I didn't dig through the pages and pages of 
photos to confirm it,  that the square versus round tuning shaft is either 
because one receiver is an R-4 and the other an R-4A or because one receiver once 
had a C-37 remote tuner installed.

Robert

In a message dated 10/09/2012 22:42:55 PM Central Daylight Time, 
radiocompass at yahoo.com writes: 
> Clare,
> 
> If you can't find the ARR-2 manual, the schematic may be found in one of 
> these publications:
> 
> CQ Surplus Schematics Handbook
> 
> Surplus Radio Conversion Manual volume 1, 2 or 3
> 
> All the Surplus Radio Conversion Manuals are available on line for free; 
> if they aren't on BAMA (I think they may be there, probably under Military), 
> just do a Google search to turn them up.  It won't be hard.  I don't know 
> if the Surplus Schematics Handbook is on line but suspect it is, somewhere; 
> a likely place to find a link may be boatachorpix.org
> 
> I have these books but they're buried right now... if you can't find the 
> diagram, let me know and maybe I can look for them later this week.
> 
> 73
> 
> Mike
> W4DSE
> 
> --- On Sun, 10/7/12, Clare Owens <clare.owens at gmail.com> wrote:
> 
> >From: Clare Owens <clare.owens at gmail.com>
> >Subject: [ARC5] R-4/ARR-2 schematic?
> >To: "Discussion of AN/ARC-5 military radio equipment." <
> ARC5 at mailman.qth.net>
> >Date: Sunday, October 7, 2012, 7:11 PM
> >Hi All,
> >
> >I was just able to mix and match parts from two R-4/ARR-2
> >receivers to make
> >one that seems to be 99% original.  If I could find a
> >schematic I could, I
> >believe, make it 100% but there is one loose wire back in
> >the compartment
> >by the rear connector that I'd like to fasten where it
> >belongs.
> >
> >I think it's interesting thet one receiver has a square
> >cross section
> >tuning rod and the other has a round one.  The round
> >one moves more
> >smoothly but the square one is in the "keeper"
> >receiver.  The non-keeper
> >was apparently modded to be a 220MHz ham receiver and was
> >too far gone to
> >be other than a parts donor.
> >
> >Does anyone have the info from NAVAER 08-SQ-261?
> >
> >Thanks,
> >
> >Clare

Robert Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480