[ARC5] Schematics of ADF UHF Homer adaptor AN/ARA-25 for ARC-52 radio

[scottjohnson1 at cox.net]

Another thought-

When the ARC-164 was installed in the 1980s, the adapter rack incorporated a small DC-DC converter to provide plate voltage to the AM-608, not necessary with the solid state ECA.

 

Scott V. Johnson, President 

Sunburst Engineering LLC

5111 E. Sharon Dr.

Scottsdale , AZ 85254

(480) 550-2358

Scottjohnson1 at cox.net

 

From: arc5-bounces at mailman.qth.net <arc5-bounces at mailman.qth.net> On Behalf Of Nico van Dongen via ARC5
Sent: Monday, July 20, 2026 1:34 PM
To: ARC-5 <ARC5 at mailman.qth.net>
Subject: [ARC5] Schematics of ADF UHF Homer adaptor AN/ARA-25 for ARC-52 radio

 

Hello,

I have found all three parts of the UHF Homer adaptor AN/ARA-25 that was used on the early military UHF aircraft radios like the ARC-27, ARC-34 and ARC-52.

The system is now integrated in my ARC-52 installation but so far without proper functionality. 

I have found  a service document labeled: Electronics UHF homer adaptor AN/ARA-25 

that includes a wiring diagram of the ARA-25 in combination with the ARC-34 radio.

 

It also contains a functional description and block diagram but unfortunately no schematics of the AS-578A/ARA-25 antenna or the AM-608/ARA-25 amplifier.

 

Anyone here that has schematics available or perhaps knows more of the functionality of the ARA-25?

 

Nico - PA3ESA 

 

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