[Milsurplus] ARR-15 receiver

[Brenda Gentry]

If anyone has a scrapper ARR-15, I need the rear connector  and filter 
assembly. It also has the dynamotor connector.  It was neatly removed 
from the receiver and I  would like to find a replacement so I can get 
the receiver  working.

       B. Gentry, KA2IVY

On 11/2/26 6:13 PM, Jim Whartenby via Milsurplus wrote:
> Enclosed is the IF mod that I did also included is the 73 magazine mod 
> which I did not do.  The audio filter has a relay built into the 
> housing.  IIRC, 28 volts energizes the relay to make the filter do low 
> pass audio duty.
> I have several ARR-15s, a few are pristine but most have some degree 
> of ham mods.  I might have the antenna connector stripped from an 
> organ donor.  I can check the parts box if you need another project! 
> <grin>
> Still a nice radio which appears to be the foundation for all Collins 
> receivers designed post WW2.
> Jim
>
> *Logic is a systematic method of coming to the wrong conclusion with 
> confidence.* *Murphy*
>
>
> On Monday, November 2, 2026 at 04:30:18 PM CST, Hubert Miller 
> <kargo_cult at msn.com> wrote:
>
>
>     I had in the mid 1970s A.D. an ARR-15 i bought from a vet. It was
>     MARS - acquired and still in some kind of large cardboard barrel.
>     I bought from Fair a 24 DC supply and ran it that way. Yes, there
>     is a definite "noise floor" running on dyno, altho i did hear some
>     interesting SWL type things, such as a game show over BBC, just
>     above 5Hz, Kuching Malaysia. My barber, who is from Malaysia, was
>     surprised at this story.
>     I have 2 of ARR-15 now, one with dyno. The odd thing abt the one
>     with dyno is, the pushee antenna connector has been changed to
>     BNC. I don't get that. If it's a ham mod, why run it on 24 DC
>     still ? When i did run it on 24 DC, i had an excuse: i didn't know
>     better.
>     There used to be on the net some article abt tightening up the IFs
>     by decreasing the low pF coupling caps. Article is gone now. I
>     wonder if anyone here has done that. I think the tuning rate is
>     too fast for CW and certainly SSB, so i'm thinking the +- 50 kHz
>     'calibrate' feature can use improved selectivity. In other words,
>     to be clear, can one improve the selectivity and use the +- IF
>     feature for fine tuning ? In those olden days, for SWL BC, AM mode
>     only, the main tuning knob was good enough.
>     Another thing i want to figure out is that audio filter. The
>     manual doesn't really explain its working or innards.
>     Lastly, let me mention that i never noticed any audio distortion
>     from the always - on noise limiter. That circuit actually does
>     have its own unique name, after the designer, but i cannot
>     remember it at this moment.
>     -Hue Miller
>
>
>     Sent from my Galaxy
>
>
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