[Milsurplus] ARR-15 receiver

[Jim Whartenby]

ARR-15 rear connectors, NIB, are still available on eBay at the inflated price of $9 for three plus shipping.  <grin>   Well, shipping is inflated compared to February, 2023 when I last bought them!See item number, 234950786827Note the soldering instructions!Jim

Logic is a systematic method of coming to the wrong conclusion with confidence.  Murphy

On Wednesday, November 4, 2026 at 11:02:57 AM CST, Brenda Gentry <ka2ivy at verizon.net> wrote:

  
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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