From cvcantwell at verizon.net  Thu Jul  2 15:58:35 2026
From: cvcantwell at verizon.net (Craig Cantwell)
Date: Thu, 2 Jul 2026 19:58:35 +0000 (UTC)
Subject: [ARC5] Radio hunting...
References: <698601471.930392.1783022315626.ref@mail.yahoo.com>
Message-ID: <698601471.930392.1783022315626@mail.yahoo.com>

I wanted to put the word out on a couple of radios that I'm hunting for a project. Quite oddball and haven't found but a couple, and they were all overseas and not available.
I'm hunting for:
Bendix TA-6A or TA-6B transmitter, A or B only differentiates between 14 or 28 VDC for power. Either will work on this project.Bendix MT-54 control head for the TA-6RCA? AVT-7 transmitter
One TA-6 popped up about 2-3 years ago in Australia and went to a private collection, and the seller no longer has any contact info on the new owner. I haven't found another anywhere in the world, even in a museum, in over a year searching.
There are two of the AVT-7's known and both are in Finland. One is in the Finnish Air Force Museum and the send was sold to a private collector in Finland, and didn't appear to be a complete unit.
Leads on locating any of these would be most helpful.
CraigKF5JOT
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From cvcantwell at verizon.net  Fri Jul  3 09:32:31 2026
From: cvcantwell at verizon.net (Craig Cantwell)
Date: Fri, 3 Jul 2026 13:32:31 +0000 (UTC)
Subject: [ARC5] Radio hunting...
In-Reply-To: <CABdVoaBJGWWG+OvT-piNgYvyMY-DbMMMpncqdSy1Q3W9tUy3yg@mail.gmail.com>
References: <698601471.930392.1783022315626.ref@mail.yahoo.com>
	<698601471.930392.1783022315626@mail.yahoo.com>
	<CABdVoaBJGWWG+OvT-piNgYvyMY-DbMMMpncqdSy1Q3W9tUy3yg@mail.gmail.com>
Message-ID: <16482821.1104268.1783085551132@mail.yahoo.com>

 Mark: It's for a potential project that's been cooking on the back burner for a number of years. Not sure if it's still going to be viable, but I've been slowly chasing all the parts that are unique to it as well, since I've found most of the AT stuff now. Radio and weapons stuff is all pre and early war items, with some being straight commercial products. The radios were essentially the same as the commercial versions, with not much more than a data plate added from what I've been able to find so far. I've managed to locate a number of Bendix drawings for the radio and it's mounts, the control head and other ancillary bits and pieces. I just need to do some letter writing and check writing to order them.
Been working on converting drawings for the AT for a bit and have done a bit over 1000 drawings. There are probably another 4500+ to do, along with probably another 2000 pages of various documents on the film. I'm starting to inventory parts that can be restored. There are boxes and boxes of parts in the warehouse and I can now identify most of them and tag them with part numbers.?
Plan is to move and inventory all the AT radio stuff this holiday weekend and start working on dynamotors first. Still have some mounts and plugs to hunt down, but still need to do a full inventory before ordering anything more. Too many boxes spread out between various locations right now!
CraigKF5JOT

    On Friday, July 3, 2026 at 07:40:53 AM CDT, Mark K3MSB <mark.k3msb at gmail.com> wrote:   

 Hi Craig
Is this for you AT-21 ?
Mark K3MSB

On Thu, Jul 2, 2026 at 3:58?PM Craig Cantwell via ARC5 <arc5 at mailman.qth.net> wrote:

I wanted to put the word out on a couple of radios that I'm hunting for a project. Quite oddball and haven't found but a couple, and they were all overseas and not available.
I'm hunting for:
Bendix TA-6A or TA-6B transmitter, A or B only differentiates between 14 or 28 VDC for power. Either will work on this project.Bendix MT-54 control head for the TA-6RCA? AVT-7 transmitter
One TA-6 popped up about 2-3 years ago in Australia and went to a private collection, and the seller no longer has any contact info on the new owner. I haven't found another anywhere in the world, even in a museum, in over a year searching.
There are two of the AVT-7's known and both are in Finland. One is in the Finnish Air Force Museum and the send was sold to a private collector in Finland, and didn't appear to be a complete unit.
Leads on locating any of these would be most helpful.
CraigKF5JOT______________________________________________________________
ARC5 mailing list
Home: http://mailman.qth.net/mailman/listinfo/arc5
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:ARC5 at mailman.qth.net

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Please help support this email list: https://www.qsl.net/donate.html
  
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From scr274 at gmail.com  Sun Jul  5 20:18:22 2026
From: scr274 at gmail.com (Ken Kinderman)
Date: Sun, 5 Jul 2026 20:18:22 -0400
Subject: [ARC5] SCR-183 Plugs
Message-ID: <CAKUjTOaYvtKZrKuWo+YZduCQMby_KC7kWnYnrmhNjusGvMe3gQ@mail.gmail.com>

Recent talk of the SCR-183 etc. reminded me that I have some plugs if
anyone needs them.

I have M-155's: 4 pins, numbers 69, 69, 70, 71

And  PL-P61's: 8 pins, numbers 45, 46,47, 53, 54, 55, 56, 57.

I wlll send any remaining to Bill Perry. If he doesn't need them for his
inventory, I'll put them on ebay  at a crazy price.

Yours for shipping.

73,

Ken
W2EWL
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From scr274 at gmail.com  Sun Jul  5 20:36:56 2026
From: scr274 at gmail.com (Ken Kinderman)
Date: Sun, 5 Jul 2026 20:36:56 -0400
Subject: [ARC5] BC-221 free for shipping
Message-ID: <CAKUjTOaxuMPxx1dzRqGbHGLOANrrZ52ANq_a1mDN9gFBUFcRsA@mail.gmail.com>

Much as I'd like to hold on this, it has to go. Nostalgic value is high,
practical value low.
Bendix BC-221M, with the calibration book. In pretty good conditon, not
mint, but really OK. It may have a home-brew p.s. in the bottom, I didn't
check before packing, but it has a line cord snaking out the back.

Comes in the BG-81-T canvas bag, with ST-19-T strap. Pouch on top of the
bag for headset (not incuded). Interestingly, the designers gave the bag no
front access to the freq. meter, so when the tech went out to the aircraft
to set up frequencies, he had to pull the whole unit out of the very snug
bag.

Comes with the manual TM11-300 and TB-300-3 (RA-133).

I'll have dimensions and weight in day or two.

73,
Ken
W2EWL
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From scr274 at gmail.com  Sun Jul  5 20:40:19 2026
From: scr274 at gmail.com (Ken Kinderman)
Date: Sun, 5 Jul 2026 20:40:19 -0400
Subject: [ARC5] BC-221 free for shipping
Message-ID: <CAKUjTOZS2vNqnvWxYDh3mA-nQyupMXjDtzpzzDhVKTOze7e_vQ@mail.gmail.com>

Here is a photo...
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From hwhall at compuserve.com  Thu Jul  9 23:17:22 2026
From: hwhall at compuserve.com (hwhall@aol.com)
Date: Fri, 10 Jul 2026 03:17:22 +0000 (UTC)
Subject: [ARC5] RBM-5 HF parts needed?
References: <436996210.73203.1783653442345.ref@mail.yahoo.com>
Message-ID: <436996210.73203.1783653442345@mail.yahoo.com>

I have a donated RBM-5 receiver, the 2-20 MHz one, that I'm thinking may be destined to be a parts unit. To help me make up my mind whether or not to attempt restoration, I'm wondering if there's a number of people who might need parts.

Inspection shows it was probably stored on a basement or garage floor & there was minor flooding. There's some corrosion on the front panel bottom. On the cabinet bottom inside, there's fine tan silt. Also some was deposited in the RF tuning boxes, but other than a small amount of oxidation spots on the box walls, the wiring & the switch parts & trimmer caps are all bright. I think the water was no more than 1/2 inch deep, from what I observe.

So, parts needed or no? (I may even need parts, myself.)

Wayne
WB4OGM

From kargo_cult at msn.com  Fri Jul 10 15:28:23 2026
From: kargo_cult at msn.com (Hubert Miller)
Date: Fri, 10 Jul 2026 19:28:23 +0000
Subject: [ARC5] RBM-5 HF parts needed?
Message-ID: <DM6PR20MB3441CCA845542D71366D8F78E4FD2@DM6PR20MB3441.namprd20.prod.outlook.com>

I have only the freq dial escutcheon from the front panel. This affixes via 3 screws to the front. Free for postage.
-Hue Miller



Sent from my Galaxy

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From scr274 at gmail.com  Fri Jul 10 17:20:46 2026
From: scr274 at gmail.com (Ken Kinderman)
Date: Fri, 10 Jul 2026 17:20:46 -0400
Subject: [ARC5] Trade for ARC-5 Window
Message-ID: <CAKUjTOaJ5k9pZAKUvJcGMHOpqPNCSQAkBXb9nh2yq9M+jgfLGw@mail.gmail.com>

Looking for an ARC-5 window. It seems these things have a way of self
immolating over time.

I have a CD-509... extension cord for the BC-659. It goes between the R/T
and the power supply to enable operating them at a distance. More
important, it facilitates servicing the R/T  without having to manhandle
both of them. About 6 feet long.

Thanks,

Ken
W2EWL

[image: IMG_0590.jpeg]
[image: IMG_0643.jpeg]
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From mzfb at aol.com  Fri Jul 10 19:19:37 2026
From: mzfb at aol.com (Mike Christie)
Date: Fri, 10 Jul 2026 23:19:37 +0000 (UTC)
Subject: [ARC5] ARC5 Digest, Vol 270, Issue 7 BC 659
In-Reply-To: <mailman.3747.1783718476.16925.arc5@mailman.qth.net>
References: <mailman.3747.1783718476.16925.arc5@mailman.qth.net>
Message-ID: <331572855.337672.1783725577065@mail.yahoo.com>

 KenWere you looking for new home for the CD-509? If so I might be interested in it.MikeW1ZFB
    On Friday, July 10, 2026 at 05:22:20 PM EDT, arc5-request at mailman.qth.net <arc5-request at mailman.qth.net> wrote:   

 Send ARC5 mailing list submissions to
??? arc5 at mailman.qth.net

To subscribe or unsubscribe via the World Wide Web, visit
??? http://mailman.qth.net/mailman/listinfo/arc5
or, via email, send a message with subject or body 'help' to
??? arc5-request at mailman.qth.net

You can reach the person managing the list at
??? arc5-owner at mailman.qth.net

When replying, please edit your Subject line so it is more specific
than "Re: Contents of ARC5 digest..."


Today's Topics:

? 1. Trade for ARC-5 Window (Ken Kinderman)


----------------------------------------------------------------------

Message: 1
Date: Fri, 10 Jul 2026 17:20:46 -0400
From: Ken Kinderman <scr274 at gmail.com>
To: Military Surplus net List <milsurplus at mailman.qth.net>,??? ARC-5 List
??? <arc5 at mailman.qth.net>
Subject: [ARC5] Trade for ARC-5 Window
Message-ID:
??? <CAKUjTOaJ5k9pZAKUvJcGMHOpqPNCSQAkBXb9nh2yq9M+jgfLGw at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

Looking for an ARC-5 window. It seems these things have a way of self
immolating over time.

I have a CD-509... extension cord for the BC-659. It goes between the R/T
and the power supply to enable operating them at a distance. More
important, it facilitates servicing the R/T? without having to manhandle
both of them. About 6 feet long.

Thanks,

Ken
W2EWL

[image: IMG_0590.jpeg]
[image: IMG_0643.jpeg]
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------------------------------

_______________________________________________
ARC5 mailing list
ARC5 at mailman.qth.net
http://mailman.qth.net/mailman/listinfo/arc5


End of ARC5 Digest, Vol 270, Issue 7
************************************
  
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From ac2eu at yahoo.com  Fri Jul 10 19:26:49 2026
From: ac2eu at yahoo.com (ac2eu at yahoo.com)
Date: Fri, 10 Jul 2026 23:26:49 +0000 (UTC)
Subject: [ARC5] Trade for ARC-5 Window
In-Reply-To: <CAKUjTOaJ5k9pZAKUvJcGMHOpqPNCSQAkBXb9nh2yq9M+jgfLGw@mail.gmail.com>
References: <CAKUjTOaJ5k9pZAKUvJcGMHOpqPNCSQAkBXb9nh2yq9M+jgfLGw@mail.gmail.com>
Message-ID: <1150031603.225712.1783726009369@mail.yahoo.com>

 In a pinch, I've used the plastic dividers that come with part storage drawers.Not perfect, but at least it's clear.
    On Friday, July 10, 2026 at 05:22:13 PM EDT, Ken Kinderman via ARC5 <arc5 at mailman.qth.net> wrote:  
 
 Looking for an ARC-5 window. It seems these things have a way of self immolating over time.
I have a CD-509... extension cord for the BC-659. It goes between the R/T and the power supply to enable operating them at a distance. More important, it facilitates servicing the R/T? without having to manhandle both of them. About 6 feet long.
Thanks,
KenW2EWL


______________________________________________________________
ARC5 mailing list
Home: http://mailman.qth.net/mailman/listinfo/arc5
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:ARC5 at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: https://www.qsl.net/donate.html  
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From cvcantwell at verizon.net  Sat Jul 11 11:28:27 2026
From: cvcantwell at verizon.net (Craig Cantwell)
Date: Sat, 11 Jul 2026 15:28:27 +0000 (UTC)
Subject: [ARC5] Connector cross reference
References: <13260718.443859.1783783707513.ref@mail.yahoo.com>
Message-ID: <13260718.443859.1783783707513@mail.yahoo.com>

Not related to ARC-5 stuff, but has anyone seen or know of a cross reference for older Bendix connectors? I've got the Bendix number and a British number for several connectors that I'm looking for. So far, I haven't found any mention of the Bendix or the British number in any of my web crawling.?
Here's an example:
Bendix is A30089 and the British is 110H/29
This happens to be a 16 pin and I don't have a pin configuration for the plug or the socket yet.
CraigKF5JOT
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From aaf-radio-1 at aafradio.org  Sat Jul 11 11:37:39 2026
From: aaf-radio-1 at aafradio.org (Michael Hanz)
Date: Sat, 11 Jul 2026 11:37:39 -0400
Subject: [ARC5] [spam]  Connector cross reference
In-Reply-To: <13260718.443859.1783783707513@mail.yahoo.com>
References: <13260718.443859.1783783707513.ref@mail.yahoo.com>
	<13260718.443859.1783783707513@mail.yahoo.com>
Message-ID: <bdcf38a8-29ab-4718-a9fd-20b13ce17132@aafradio.org>

You could try the document I posted on my web page - 
https://aafradio.org/docs/Aircraft_Plugs_and_Connectors.pdf

There are two short sections that might help.

Mike? KC4TOS

On 7/11/2026 11:28 AM, Craig Cantwell via ARC5 wrote:
> Not related to ARC-5 stuff, but has anyone seen or know of a cross 
> reference for older Bendix connectors? I've got the Bendix number and 
> a British number for several connectors that I'm looking for. So far, 
> I haven't found any mention of the Bendix or the British number in any 
> of my web crawling.
>
> Here's an example:
>
> Bendix is A30089 and the British is 110H/29
>
> This happens to be a 16 pin and I don't have a pin configuration for 
> the plug or the socket yet.
>
> Craig
> KF5JOT

From cvcantwell at verizon.net  Sat Jul 11 13:53:24 2026
From: cvcantwell at verizon.net (Craig Cantwell)
Date: Sat, 11 Jul 2026 17:53:24 +0000 (UTC)
Subject: [ARC5] [spam]  Connector cross reference
In-Reply-To: <bdcf38a8-29ab-4718-a9fd-20b13ce17132@aafradio.org>
References: <13260718.443859.1783783707513.ref@mail.yahoo.com>
	<13260718.443859.1783783707513@mail.yahoo.com>
	<bdcf38a8-29ab-4718-a9fd-20b13ce17132@aafradio.org>
Message-ID: <994103006.459520.1783792404709@mail.yahoo.com>

 Mike: That's a huge help.? The one I listed is in there. I need to go thru the radio manual and pull all the numbers now and cross them. I can generally find the Cannon ones when I have those numbers. Might take some digging and watching, but eventually they come available.
Thank you a ton,CraigKF5JOT
    On Saturday, July 11, 2026 at 10:37:42 AM CDT, Michael Hanz <aaf-radio-1 at aafradio.org> wrote:   

 You could try the document I posted on my web page - 
https://aafradio.org/docs/Aircraft_Plugs_and_Connectors.pdf

There are two short sections that might help.

Mike? KC4TOS

On 7/11/2026 11:28 AM, Craig Cantwell via ARC5 wrote:
> Not related to ARC-5 stuff, but has anyone seen or know of a cross 
> reference for older Bendix connectors? I've got the Bendix number and 
> a British number for several connectors that I'm looking for. So far, 
> I haven't found any mention of the Bendix or the British number in any 
> of my web crawling.
>
> Here's an example:
>
> Bendix is A30089 and the British is 110H/29
>
> This happens to be a 16 pin and I don't have a pin configuration for 
> the plug or the socket yet.
>
> Craig
> KF5JOT
  
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From r390a.urr at gmail.com  Thu Jul 16 07:23:03 2026
From: r390a.urr at gmail.com (Dave Merrill)
Date: Thu, 16 Jul 2026 06:23:03 -0500
Subject: [ARC5] SCR-274N Starter Set + T-47/ART-13
Message-ID: <CAGRTi8Wa-mOxJF_fyvtpg=sNvyJf_pD3nCJFwiJyZjh6X3bneQ@mail.gmail.com>

https://ebay.io/m/DnNzAc

Looks pretty complete, someone put a lot of time into it.

--... ...-- Dave N9ZC
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From Nico at nvandongen.nl  Mon Jul 20 16:33:37 2026
From: Nico at nvandongen.nl (Nico van Dongen)
Date: Mon, 20 Jul 2026 22:33:37 +0200
Subject: [ARC5] Schematics of ADF UHF Homer adaptor AN/ARA-25 for ARC-52
	radio
Message-ID: <CACh5J2BLCAP=pwn3QrODzN6QNk5OCeBy6_Af44LNSWtAooB0Vg@mail.gmail.com>

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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From k5urg at yahoo.com  Mon Jul 20 17:16:31 2026
From: k5urg at yahoo.com (k5urg at yahoo.com)
Date: Mon, 20 Jul 2026 16:16:31 -0500
Subject: [ARC5] Schematics of ADF UHF Homer adaptor AN/ARA-25 for
	ARC-52	radio
In-Reply-To: <CACh5J2BLCAP=pwn3QrODzN6QNk5OCeBy6_Af44LNSWtAooB0Vg@mail.gmail.com>
References: <CACh5J2BLCAP=pwn3QrODzN6QNk5OCeBy6_Af44LNSWtAooB0Vg@mail.gmail.com>
Message-ID: <013f01dd188d$09f35420$1dd9fc60$@yahoo.com>

Here it is!

 

It is a fun thing to play with!  Good luck!

 

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 3:34 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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From scottjohnson1 at cox.net  Mon Jul 20 17:29:33 2026
From: scottjohnson1 at cox.net (scottjohnson1 at cox.net)
Date: Mon, 20 Jul 2026 14:29:33 -0700
Subject: [ARC5] Schematics of ADF UHF Homer adaptor AN/ARA-25 for
	ARC-52	radio
In-Reply-To: <CACh5J2BLCAP=pwn3QrODzN6QNk5OCeBy6_Af44LNSWtAooB0Vg@mail.gmail.com>
References: <CACh5J2BLCAP=pwn3QrODzN6QNk5OCeBy6_Af44LNSWtAooB0Vg@mail.gmail.com>
Message-ID: <02e401dd188e$dc7d6150$957823f0$@cox.net>

The ARA-25 was retained in many platforms and is still working with ARC-164 and even ARC-210 in legacy platforms such as KC-135, C-130, and B-52.

 

Scott W7SVJ

 

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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From scottjohnson1 at cox.net  Mon Jul 20 17:39:39 2026
From: scottjohnson1 at cox.net (scottjohnson1 at cox.net)
Date: Mon, 20 Jul 2026 14:39:39 -0700
Subject: [ARC5] Schematics of ADF UHF Homer adaptor AN/ARA-25
	for	ARC-52	radio
In-Reply-To: <013f01dd188d$09f35420$1dd9fc60$@yahoo.com>
References: <CACh5J2BLCAP=pwn3QrODzN6QNk5OCeBy6_Af44LNSWtAooB0Vg@mail.gmail.com>
	<013f01dd188d$09f35420$1dd9fc60$@yahoo.com>
Message-ID: <030101dd1890$45b0e100$d112a300$@cox.net>

There is a solid-state version of the ECA, don?t remember the designation, might be an AM-608A?

 

Scott W7SVJ

 

From: arc5-bounces at mailman.qth.net <arc5-bounces at mailman.qth.net> On Behalf Of FRANCESCO LEDDA via ARC5
Sent: Monday, July 20, 2026 2:17 PM
To: 'Nico van Dongen' <Nico at nvandongen.nl>; 'ARC-5' <ARC5 at mailman.qth.net>
Subject: Re: [ARC5] Schematics of ADF UHF Homer adaptor AN/ARA-25 for ARC-52 radio

 

Here it is!

 

It is a fun thing to play with!  Good luck!

 

From: arc5-bounces at mailman.qth.net <mailto:arc5-bounces at mailman.qth.net>  <arc5-bounces at mailman.qth.net <mailto:arc5-bounces at mailman.qth.net> > On Behalf Of Nico van Dongen via ARC5
Sent: Monday, July 20, 2026 3:34 PM
To: ARC-5 <ARC5 at mailman.qth.net <mailto: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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From scottjohnson1 at cox.net  Mon Jul 20 17:43:44 2026
From: scottjohnson1 at cox.net (scottjohnson1 at cox.net)
Date: Mon, 20 Jul 2026 14:43:44 -0700
Subject: [ARC5] Schematics of ADF UHF Homer adaptor AN/ARA-25 for
	ARC-52	radio
In-Reply-To: <CACh5J2BLCAP=pwn3QrODzN6QNk5OCeBy6_Af44LNSWtAooB0Vg@mail.gmail.com>
References: <CACh5J2BLCAP=pwn3QrODzN6QNk5OCeBy6_Af44LNSWtAooB0Vg@mail.gmail.com>
Message-ID: <031701dd1890$d78f1a60$86ad4f20$@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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