[Milsurplus] Dynamotor curiosity

[Robert Downs]

My only comment is that looking at the photo and the rest of his ad, it’s pretty obvious that the seller doesn’t know his market.  DY-34B/ARR-15 would get if nothing else a lot more hits than DM-53.  And it is, after all, no longer usable as a DM-53 other than for parts.

 

But I have never seen a complete DY-34.  What are these rubber pads mentioned by Mike H?

 

 

 

Robert Downs

 

From: milsurplus-bounces at mailman.qth.net [mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of Michael Hanz
Sent: Wednesday, March 18, 2020 12:10
To: Jack Antonio; milsurplus at mailman.qth.net
Subject: Re: [Milsurplus] Dynamotor curiosity

 

Looking at the dyno photos, that's the way it was originally made, Jack.  See photo below on one of mine.

  

It's a pity the snap slide base with the four rubber pads is gone, but those small rubber pads are forever prone to detachment over time.  I do have a couple of spare "command set" dyno snap slide baseplates if anyone needs one for an application like this.  I'll even bore out the hole in the middle, for postage.  Rubber pads not included, but you can get the rubber on McMaster-Carr and use a razor blade to cut them out.  That will still leave the eight small metal end plates to fabricate, but that wouldn't be too hard on a lathe.

- Mike  KC4TOS

On 3/18/2020 10:05 AM, Jack Antonio wrote:

eBay item number 114152560578 is listed 
as a DM-53 dynamotor, the nameplate for which 
is clearly shown in the photos. The DM-53 is the 
dynamotor for the BC-733 ILS receiver, which 
doesn't have much collector interest(except 
for weirdos like myself). 

However, it also carries the nameplate 
showing it as a DY-34B/ARR-15. And it has 
the base and brush holder for the 
AN/ARR-15 dynamotor. The unit in the 
photo will not fit on a BC-733. 

Both nameplates look riveted on, so I 
don't think this is a ham hack. 

Just wondering if this was maybe a 
postwar overhaul of a DY-34 that used 
the machine from a DM-53 as a replacement. 

Just think it was unusual that it would 
carry the original nomenclature plate. 

So if anyone needs a dynamotor for their 
AN/ARR-15, here you go. 

 

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