[ARC5] Type 12 In WWII

[Mike Morrow]

The 24v dynamotor for the AN/ARC-5 receivers is the DY-2A/ARR-2.  Its nomenclature was first assigned for use with the R-4*/ARR-2 "ZB" homing receiver that was used in most AN/ARC-5 receiver installations.

There is a 12v version of AN/ARR-2 using the R-3/ARR-2X.  Its dynamotor is the DY-1/ARR-2X.

Thus, there is a proper military dynamotor that is an exact 12v equivalent of the 24v "command set" dynamotors.

There are also mechanically and electrically equivent 12v dynamotors from some USN interphone systems that would work well with no modification.

For the A.R.C. Type 12 (and 11A and 17) there is the D-10(14v) equivalent to the D-10(28v) that fits earlier military receivers.

Mike / KK5F

-----Original Message-----
From: Robert Eleazer <releazer at earthlink.net>
Sent: Jul 31, 2021 5:52 PM
To: <arc5 at mailman.qth.net>
Subject: [ARC5] Type 12 In WWII

I did NOT say that Type 12 Radios were used in WWII.  I did say that I have Type 12 radios where the DM-32 dynamotor bases were used with the WWII tank radio 12VDC SCR-528/628 dynamotors so that the system could operate on 12VDC.  If they did that in the late 40's then they could have done it with SCR-274-N equipment in WWII.   By the way, I think the tank receivers used 220VDC, but that would have made no difference.

Wayne
WB5WSV
 

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