[Milsurplus] AVIOMETER CORP. NEW YORK TYPE 9044 NAF NO. 213264-61

[WA5CAB at cs.com]

Roger & Mike,

First, all of the RS-38-A's I've seen that had coiled cords are post-war 
Japanese made.  Fair had a bunch of them years ago NOSB and I bought a couple of 
dozen.  I bought them mainly because at the time I had a lot of TCS sets and 
some TBX and several people who bought the radios also wanted mics.  But after 
selling a couple and then having to eat the sales, I opened up a few and found 
the internal workmanship in both the mic and the PJ-068 to be very poor.  So I 
stuck them on a shelf somewhere, where they remain to this day.

The round black hock-puck shaped Navy mic with the PTT button on top is, as 
Mike says, most commonly known as the RS-38-A.  However, there are actually 
three non-interchangable variants of the basic design.  The one normally found 
with straight cord and Navy version of the PL-68 may be marked RS-38, RS-38-A, 
NAF 213264-6, Cxx-51004, Cxx-51004-A or Cxx-51004-C.  Unless someone has 
swapped parts around, all should be functionally interchangable.  The PTT switch 
switches the carbon element (sleeve) and the key line (tip) to ground (sleeve).  
Although the carbon element can go open, the most common problem (as with the 
T-17) is the switch contacts, which is easily fixable with a burnishing tool.

The second variant is also marked either RS-38 or RS-38-A (my notes aren't 
clear on this) but marked Cxx-51042 (instead of 51004).  Does not have the Navy 
PL-68.  This is the one used on the MAB.

The third variant is used with the TBY.  It differs from the other two in 
having a different PTT switch, a larger front cover with two rings of large holes 
(I keep forgetting to count them) instead of the three very small ones, and a 
different cord.  It is marked RS-38-B and/or Cxx-51004-B.  It should have a 
hanger clip attached to the back of the case.

Cxx is the Navy Contractor Code, perhaps the most common being CTE 
(Telephonics).  Less common is CMX (Magnavox).

In a message dated 3/22/2007 9:46:37 AM Central Standard Time, 
roger at new-gate.co.uk writes: 
> Hi Mike,
> 
> Many thanks for that info. I would expect to see a small resistance across 
> the mic element but there is nothing, so I guess the PTT switch is duff. It 
> looks very similar to the mic on my TBY-8, so I'll run a check against that.
> 
> 73,
> 
> Roger/G3VKM
> 
> 
> 
> 
> ----- Original Message ----- 
> From: "Mike Morrow" <kk5f at earthlink.net>
> To: "Roger Basford" <roger at new-gate.co.uk>; <milsurplus at mailman.qth.net>
> Sent: Thursday, March 22, 2007 3:34 PM
> Subject: Re: [Milsurplus] AVIOMETER CORP. NEW YORK TYPE 9044 NAF NO. 
> 213264-61
> 
> 
> >Roger wrote:
> >
> >>Can anyone tell me the type, i.e. carbon, moving coil, etc. of a 
> >>microphone
> >>marked AVIOMETER CORP. NEW YORK, TYPE 9044  NAF NO. 213264-6, and what it 
> >>is
> >>likely to have been used on?
> >
> >NAF 213264-6 is the very common US Navy WWII-era standard *carbon* mic 
> >that is usually known as and marked "RS 38-A."  Some have coiled cords, 
> >some do not.
> >
> >It is the USN's equivalent to the US Army Signal Corps T-17-*, and it is 
> >mostly interchangable with a T-17, except that the T-17 has a handle to 
> >hold, while the RS 38-A does not...it's just a circular puck-shape.  It 
> >would perfectly and appropriately accompany *any* WWII-era US Navy phone 
> >transmitting system.
> 

Robert & Susan Downs - Houston
<http://www.wa5cab.com> (Web Store)
MVPA 9480
<wa5cab at cs.com> (Primary email)
<wa5cab at houston.rr.com> (Backup email)
   
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