[ARC5] Headphones H-43 B/U

[Kenneth G. Gordon]

On 15 Mar 2014 at 20:55, mac wrote:

> Dennis,, Ken, et-al,
> 
> 20K sounds awfully high for a magnetic headphone.  Crystal unit  
> maybe?  "Scot's Headphone Museum Gallery" lists the H-43 B/U at 3000  
> ohms see <http://oldheadphones.com/crystal/gallery/gallery2.html>

Yes. I saw that. But when I bought them off eBay the seller was certain they 
were 20K ohms AND, besides, I found this:

http://www.liberatedmanuals.com/TM-11-487M.pdf

which lists a bunch of military audio components, like loudspeakers, 
headphones, etc.

That document says the H-43-B/U is 20 K also.

I guess I'll have to test them out to see.

Ken W7EKB