[ARC5] Re: [Milsurplus] Dynamotors...

[David Stinson]

Mike Morrow wrote:

> Also usable are the equivalent ARA dynamotors, and the post-war A.R.C.
> commercial type 12 D-10 and D-10A dynamotors, or the military nomenclatured
> version of the D-10A, the DY-86/ARN-30.  The D-10A and the DY-86/ARN-30 had
> a little higher HV current rating (80 vs. 65 mA) than others mentioned.

One difference between a DM-32 and a D-10 / DY-86: 
The D-10 is often missing the hash suppresser cap across
the dyno brushes.  Don't remember if it's both ends or
just the low-voltage end that's missing it.

> Of course, in service I'm sure things got swapped.  I have a USAF R-11 that
> has a DM-32-A still lockwired in place.  That works OK in place of a D-10A
> on the R-10 and -11, but I don't think that substitution would have been OK
> on the VHF receiver R-15 or -19 that has nine tubes needing HV, and that was
> often paired with a VHF transmitter or UHF converter which got HV from the
> receiver dynamotor.

Lots of swapping did take place.  I have a couple of D-10s 
that are obviously re-nomenclatured.  In fact, I have one
that has a double-stamped plate; one side says "D-10"
and the other says "DM-32." 

> It's a real pleaser to me when the dynamotor contract number matches
> the receiver's, but I guess that's getting a little too obsessive.
Don't feel alone; I'm absolutely picky 
about the nomen plates being "right," 
to the point that I won't acquire a set that doesn't have one.
After all: An ultimately-rare RAV set is exactly like a first run ARA, 
save for the nomen plate.  
Without that plate, it's just another ARA in my book.

73 OM DE Dave AB5S