Does anyone have any info on the dynamic mic that was used with the -522? 

Oxygen mask mic? T-44? Impedance? Output level? I have the adapter (I forget the nomenclature…gotta dig it out) that allowed the use of a carbon mic. But I’d like to try a dynamic mic with it (T-47 as well).


Ken Kinderman
W2EWL

On Tue, Apr 22, 2025 at 5:05 PM Brenda Gentry via Milsurplus <milsurplus@mailman.qth.net> wrote:

The ARC-1 and 4 were based upon a prewar project by Western Electric. In their company journal "The Oscillator", they had an article "Aviation clears it's Voice", I am fairly certain in 1939 or 40. SCR-522s were often adapted for AC power and used at small airfields on 122.8 Unicom. ARC-3s definitely made their way into larger private  and surplus military planes through the 1960s. Technically,  it was'nt really kosher, but along with URC-4s recrystalled and used in Piper Cubs, Taylorcrafts, and Aeroncas at small airfields, it went on a lot and very few objected. The BC-639 receiver reminds me a lot of the SCR-522 receiver even though it is tunable instead of rockbound.

     B. Gentry, KA2IVY

On 4/22/25 10:55 AM, kgordon2006 wrote:
Well, IMHO, it is a typically British design: not particularly ergonomically arranged and too spread out.

It is just plain ugly.

However, as you say, it was very important.

The ARC-3 and its later developments were better rigs, but, again, IMHO, the 522 started the process.

Ken W7EKB



Sent via the Samsung Galaxy S21 5G, an AT&T 5G smartphone


-------- Original message --------
From: David Stinson <arc5@ix.netcom.com>
Date: 4/22/25 04:37 (GMT-08:00)
Subject: Re: [Milsurplus] [ARC5] SCR-522 Playing.

I once described it as "an ugly, black lump of a radio," but I've
warmed to it over the years.  Besides- it's arguably the most
important aircraft radio deployed in WWII.
73 DE Dave AB5S

On 4/21/2025 7:48 PM, hwhall@aol.com wrote:
I have to say, though, the 522 doesn't look very sexy, like ART-13s or even Command Sets.... LOL

Wayne
WB4OGM




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