[ARC5] My mil phones - more yet

[Mike Hanz]

On 1/2/2015 2:21 PM, Kenneth G. Gordon wrote:
> OK. So they are HS-23s with a 4K impedance.

Then you're in luck.  The ones in the ebay offering appear to be 
NAF-48490-1, which do fit USAAF HS-23 or HS-33 headsets with ANB-H1 or 
H1A elements.  The notches allow headbands that engage either pair out 
of the four pivot points on the element.  They also work fine for Navy 
aircraft headphones (duh...NAF = Naval Air Facility)

> According to what I have found so far, I don't understand why they have a
> PL-354 on them though...

Nor do I.  The red PL-354 was used to identify a low impedance HS-33 
headset during the period when both HS-23 and HS-33 headsets were in use.

73,
Mike  KC4TOS